As filed with the Securities and Exchange Commission on May 1, 2018

Registration No. 333-                    

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Mid-Con Energy Partners, LP

(Exact name of registrant as specified in its charter)

2431 East 61st Street, Suite 850, Tulsa, Oklahoma 74136

(918) 743-757

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Charles L. McLawhorn, III

Mid-Con Energy GP, LLC

2431 East 61st Street, Suite 850

Tulsa, Oklahoma 74136

(918) 743-7575

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

William J. Cooper

Sidley Austin LLP

1501 K Street, N.W. #600

Washington, D.C. 20005

(202) 736-8000

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.  ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.  ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.  ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act:

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

CALCULATION OF REGISTRATION FEE

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. The securities may not be sold pursuant to this prospectus until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

SUBJECT TO COMPLETION DATED May 1, 2018

PROSPECTUS

Mid-Con Energy Partners, LP

13,852,687

Common Units Representing Limited Partner Interests

This prospectus relates to 13,852,687 common units representing limited partner interests (the “Common Units”) in Mid-Con Energy Partners, LP (the “Partnership”) issuable to the selling unitholders named in this prospectus or in any supplement to this prospectus or any transferee, assignee or other successor-in-interest to any such selling unitholder (collectively, the “Selling Unitholders”) upon conversion of 9,803,921 Class B Preferred Units representing limited partner interests in the Partnership (the “Class B Preferred Units”), and 4,048,766 Common Units issuable upon conversion of 4,048,766 Class B Preferred Units that the Partnership may issue from time to time in the future as payment in kind to the Selling Unitholders. The Class B Preferred Units are initially convertible into Common Units on a one-for-one basis; however, the conversion ratio is subject to adjustment. See “Description of the Class B Preferred Units.”

We will not receive any proceeds from the sale of Common Units owned by the Selling Unitholders. For a more detailed discussion of the Selling Unitholders, please read “Selling Unitholders.”

The Common Units may be offered and sold by the Selling Unitholders for their own account from time to time in accordance with the provisions set forth under “Plan of Distribution.” The Selling Unitholders may offer and sell these securities to or through one or more underwriters, dealers and agents, who may receive compensation in the form of discounts, concessions or commissions, or directly to purchasers, on a continuous or delayed basis. The Selling Unitholders may offer and sell these securities at various times in amounts, at prices and on terms to be determined by market conditions and other factors at the time of such offerings. This prospectus describes the general terms of these securities and the general manner in which the Common Units may be offered and sold by the Selling Unitholders. The specific manner in which the Selling Unitholders will offer and sell the Common Units will be described in a supplement to this prospectus, which may also add to, update or change the information contained or incorporated by reference in this prospectus.

You should carefully read this prospectus, any applicable prospectus supplement and the documents we refer to under the heading “Where You Can Find More Information” of this prospectus before you purchase any of our Common Units.

Our Common Units are traded on the National Association of Securities Dealers Automated Quotation System Global Select Market (the “NASDAQ”) under the symbol “MCEP.” The last reported sales price of our Common Units on the NASDAQ on April 24, 2018 was $1.90 per Common Unit.

Investing in our Common Units involves risks. You should carefully read and consider the risks related to an investment in our Common Units and each of the other risk factors described under “Risk Factors” on page 1 of this prospectus, in any applicable prospectus supplement and in our periodic reports filed with the Securities and Exchange Commission before you make an investment in our Common Units.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities, or determined if this prospectus or any prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is                     , 2018.

TABLE OF CONTENTS

In making your investment decision, you should rely only on the information contained or incorporated by reference in this prospectus and any prospectus supplement. Neither we nor any Selling Unitholder has authorized anyone to provide you with any other information. If anyone provides you with different or inconsistent information, you should not rely on it.

You should not assume that the information contained in this prospectus or in any prospectus supplement is accurate as of any date other than the date on the front cover of those documents. You should not assume that the information contained in the documents incorporated by reference in this prospectus or in any prospectus supplement is accurate as of any date other than the respective dates of those documents. Our business, financial condition, results of operations and prospects may have changed since those dates.

This prospectus and any prospectus supplement is not an offer to sell, nor a solicitation of an offer to buy, Common Units in any jurisdiction where the offer or sale is not permitted.

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we have filed with the Securities and Exchange Commission (the “SEC”) under the Securities Act of 1933, as amended (the “Securities Act”), utilizing a “shelf” registration process. Under this shelf registration process, the Selling Unitholders may, from time to time, sell up to 9,803,921 Common Units issuable to the Selling Unitholders upon conversion of 9,803,921 Class B Preferred Units, and 4,048,766 Common Units issuable upon conversion of 4,048,766 Class B Preferred Units that the Partnership may issue from time to time in the future as payment in kind to the Selling Unitholders. The Class B Preferred Units are initially convertible into Common Units on a one-for-one basis; however, the conversion ratio is subject to adjustment. See “Description of the Class B Preferred Units.”

This prospectus provides you with a general description of Mid-Con Energy Partners, LP and the Common Units that are registered hereunder that may be offered by the Selling Unitholders. Each time the Selling Unitholders sell any Common Units offered by this prospectus, the Selling Unitholders are required to provide you with this prospectus and the related prospectus supplement containing specific information about the Selling Unitholders and the terms of the Common Units being offered in the manner required by the Securities Act.

If necessary, the specific manner in which the Common Units may be offered and sold will be described in a supplement to this prospectus or a free writing prospectus. Any prospectus supplement or free writing prospectus may add to, update or change the information contained or incorporated by reference in this prospectus. Any statement made or incorporated by reference in this prospectus will be modified or superseded by any inconsistent statement made in a prospectus supplement or a free writing prospectus. Therefore, you should read this prospectus (including any documents incorporated by reference) and any prospectus supplement or free writing prospectus before you invest in our Common Units.

This prospectus does not contain all of the information set forth in the registration statement, or the exhibits that are a part of the registration statement, parts of which are omitted as permitted by the rules and regulations of the SEC. Additional information, including our financial statements and the notes thereto, is incorporated in this prospectus by reference to our reports filed with the SEC. Please read “Where You Can Find More Information.” You are urged to read carefully this prospectus and any attached prospectus supplements relating to the securities offered to you, together with the additional information described under the heading “Where You Can Find More Information,” before investing in our securities.

As used in this prospectus, “Mid-Con Energy Partners,” “the Partnership,” “we,” “our,” “us” or like terms mean Mid-Con Energy Partners, LP, a Delaware limited partnership, and its subsidiaries. References to our “general partner” refer to Mid-Con Energy GP, LLC, the general partner of the Partnership, which effectively manages the business and affairs of the Partnership. References to “Yorktown” collectively refers to Yorktown Partners LLC, Yorktown Energy Partners VI, L.P., Yorktown Energy Partners VII, L.P., Yorktown Energy Partners IX, L.P. and/or Yorktown Energy Partners X, L.P. References to our “predecessor” collectively refers to Mid-Con Energy Corporation, prior to June 30, 2009, and to Mid-Con Energy I, LLC and Mid-Con Energy II, LLC, on a combined basis, thereafter, our respective predecessors for accounting purposes. References to Mid-Con III refer to Mid-Con Energy III, LLC, a Delaware limited liability company and an affiliate of our general partner. References to our partnership agreement refer to the First Amended and Restated Agreement of Limited Partnership of the Partnership, as amended by the Second Amendment thereto.

WHERE YOU CAN FIND MORE INFORMATION

We have filed a registration statement with the SEC under the Securities Act that registers the Common Units offered by this prospectus. The registration statement, including the attached exhibits, contains additional relevant information about us. The rules and regulations of the SEC allow us to omit some information included in the registration statement from this prospectus.

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In addition, we file annual, quarterly and current reports and other information with the SEC. You may read and copy any document we file at the SEC’s public reference room at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-732-0330 for further information on the operation of the SEC’s public reference room. Our SEC filings are available on the SEC’s website at http://www.sec.gov. We also make available free of charge on our website at http://www.midconenergypartners.com, all materials that we file electronically with the SEC, including our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, Section 16 reports and amendments to these reports, as soon as reasonably practicable after such materials are electronically filed with, or furnished to, the SEC.

The SEC allows us to “incorporate by reference” the information we have filed with the SEC. This means that we can disclose important information to you without actually including the specific information in this prospectus by referring you to other documents filed separately with the SEC. These other documents contain important information about us, our financial condition and our results of operations. The information incorporated by reference is an important part of this prospectus. Any statement contained or incorporated by reference in this prospectus shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein, or in any subsequently filed document which also is incorporated by reference herein, modifies or supersedes such earlier statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

Unless otherwise specified, information contained on, or available by hyperlink from, our website or contained on the SEC’s website is not incorporated into this prospectus.

We incorporate by reference the documents listed below and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), (excluding any information in those documents that is deemed by the rules of the SEC to be furnished and not filed with the SEC) until all offerings under the registration statement of which this prospectus forms a part are completed or terminated, or after the date on which such registration statement was initially filed with the SEC and before the effectiveness of such registration statement:

You may obtain copies of any of the documents incorporated by reference in this prospectus from the SEC through the SEC’s website at the address provided above. You also may request a copy of any document incorporated by reference in this prospectus (including exhibits to those documents specifically incorporated by reference in this prospectus), at no cost, by visiting our website at http://www.midconenergypartners.com, or by writing or calling us at the following address:

Mid-Con Energy Partners, LP

2431 East 61st Street, Suite 850

Tulsa, Oklahoma 74136

(918) 743-7575

Attn: Investor Relations

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FORWARD-LOOKING STATEMENTS

Some of the information included in this prospectus, any prospectus supplement and the documents we incorporate by reference contain “forward-looking statements” that are subject to a number of risks and uncertainties, many of which are beyond our control, which may include statements about our:

All of these types of statements, other than statements of historical fact included in this prospectus, are forward-looking statements. These forward-looking statements may be found in “Risk Factors” and other sections of this prospectus, in the “Financial Statements,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Business,” “Properties” and other items within our most recent annual report on Form 10-K, which is incorporated by reference herein. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “could,” “should,” “expect,” “plan,” “project,” “intend,”

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“anticipate,” “believe,” “estimate,” “predict,” “potential,” “pursue,” “target,” “continue,” “goal,” “forecast,” “guidance,” “might,” “scheduled” and the negative of such terms or other comparable terminology.

The forward-looking statements contained in this prospectus, any prospectus supplement and the documents we incorporate by reference are largely based on our expectations, which reflect estimates and assumptions made by our management. These estimates and assumptions reflect our best judgment based on currently known market conditions and other factors. Although we believe such estimates and assumptions to be reasonable, they are inherently uncertain and involve a number of risks and uncertainties that are beyond our control. In addition, management’s assumptions about future events may prove to be inaccurate. All readers are cautioned that the forward-looking statements contained in this prospectus, any prospectus supplement and the documents we incorporate by reference are not guarantees of future performance, and we cannot assure any reader that such statements will be realized or that the forward-looking events will occur. Actual results may differ materially from those anticipated or implied in the forward-looking statements due to factors described in the “Risk Factors” section and elsewhere in this prospectus, any prospectus supplement and the documents we incorporate by reference. All forward-looking statements speak only as of the date made, and other than as required by law, we do not intend to update or revise any forward-looking statements as a result of new information, future events or otherwise. These cautionary statements qualify all forward-looking statements attributable to us or persons acting on our behalf.

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ABOUT MID-CON ENERGY PARTNERS, LP

We are a publicly held Delaware limited partnership formed in July 2011 that engages in the ownership, acquisition, exploitation and development of producing oil and natural gas properties in North America, with a focus on enhanced oil recovery (“EOR”). Our properties are located in Oklahoma, Texas and Wyoming. Our properties primarily consist of mature, legacy onshore oil reservoirs with long-lived, relatively predictable production profiles and low production decline rates.

Our general partner, Mid-Con Energy GP, LLC, is a Delaware limited liability company. Neither we, our general partner, nor our subsidiaries have any employees. We and our general partner are parties to a services agreement with Mid-Con Energy Operating, LLC, a Delaware limited liability (“Mid-Con Energy Operating”), pursuant to which Mid-Con Energy Operating provides management, administrative and operational services to us.

Our Common Units are traded on the NASDAQ under the symbol “MCEP.”

Our principal executive office is located at 2431 East 61st Street, Suite 850, Tulsa, Oklahoma 74136, and our telephone number is (918) 743-7575.

RISK FACTORS

An investment in our securities involves risks. Before you invest in our securities, you should consider carefully the risk factors included herein and in our most recent annual report on Form 10-K, subsequent quarterly reports on Form 10-Q, and our other reports filed from time to time with the SEC, which are incorporated by reference into this prospectus, as the same may be amended, supplemented or superseded from time to time by our filings under the Exchange Act, as well as those that may be included in any applicable prospectus supplement. Before making an investment decision, you should carefully consider these risks as well as all of the other information included or incorporated by reference in this prospectus, any applicable prospectus supplement and the documents we incorporate by reference.

If any of these risks were to materialize, our business, results of operations, cash flows and financial condition could be materially adversely affected. In that case, our ability to make distributions to our unitholders or pay interest on, or the principal of, any debt securities, may be reduced, the trading price of our securities could decline and you could lose all or part of your investment.

Risk Related to the Offering

Sales by the Selling Unitholders of the Common Units covered by this prospectus could adversely affect the trading price of our Common Units.

We are registering for resale 9,803,921 Common Units issuable to the Selling Unitholders upon conversion of 9,803,921 Class B Preferred Units, which represent approximately 32.4% of our currently outstanding Common Units. We are also registering an additional 4,048,766 Common Units issuable upon conversion of 4,048,766 Class B Preferred Units that we may issue from time to time in the future as payment in kind to the Selling Unitholders, which, together with the Common Units issuable upon conversion of the 9,803,921 Class B Preferred Units, represent approximately 45.7% of our currently outstanding Common Units. Subject to certain exceptions, we are obligated to keep this prospectus current so that, once issued, the Common Units can be sold in the public market at any time. The resale of all or a substantial portion of the Common Units in the public market, or the perception that these sales might occur, could cause the market price of our Common Units to decrease and may make it more difficult for us to sell our equity securities in the future at a time and upon terms that we deem appropriate.

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USE OF PROCEEDS

We will not receive any proceeds from the sale of Common Units by the Selling Unitholders.

DESCRIPTION OF THE COMMON UNITS

The Common Units

Our Common Units are traded on the NASDAQ under the symbol “MCEP.” At the close of business on April 24, 2018, based upon information received from our transfer agent and brokers and nominees, we had approximately 37 unrestricted common unitholders of record. This number does not include owners for whom Common Units may be held in “street” name or whose Common Units are restricted. The holders of Common Units are entitled to participate in partnership distributions and exercise the rights or privileges available to limited partners under our partnership agreement. For a description of the rights of holders of Common Units in and to partnership distributions, please read this section and “Provisions of Our Partnership Agreement Relating to Cash Distributions.” For a description of other rights and privileges of limited partners under our partnership agreement, including voting rights, please read “The Partnership Agreement.” As of April 24, 2018, 30,305,628 Common Units were outstanding.

Transfer Agent and Registrar

Duties

EQ Shareowner Services serves as registrar and transfer agent for the Common Units. We pay all fees charged by the transfer agent for transfers of Common Units, except the following, which must be paid by our unitholders:

There is no charge to our unitholders for disbursements of our cash distributions. We will indemnify the transfer agent, its agents and each of their respective stockholders, directors, officers and employees against all claims and losses that may arise out of their actions for their activities in that capacity, except for any liability due to any gross negligence or willful misconduct of the indemnitee.

Resignation or Removal

The transfer agent may resign, by notice to us, or be removed by us. The resignation or removal of the transfer agent will become effective upon our appointment of a successor transfer agent and registrar and its acceptance of the appointment. If no successor is appointed, our general partner may act as the transfer agent and registrar until a successor is appointed.

Transfer of Common Units

By transfer of Common Units in accordance with our partnership agreement, each transferee of Common Units shall be admitted as a limited partner with respect to the Common Units transferred when such transfer and admission are reflected in our books and records. Each transferee:

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Our general partner may request that a transferee of common units certify that such transferee is an Eligible Holder. As of the date of this prospectus, an Eligible Holder means:

For the avoidance of doubt, onshore mineral leases or any direct or indirect interest therein may be acquired and held by aliens only through stock ownership, holding or control in a corporation organized under the laws of the United States or of any state thereof.

In addition to other rights acquired upon transfer, the transferor gives the transferee the right to be admitted to our partnership as a limited partner with respect to the transferred common units. A transferee will become a limited partner of our partnership for the transferred common units automatically upon the recording of the transfer on our books and records. Our general partner will cause any transfers to be recorded on our books and records no less frequently than quarterly.

Until a Common Unit has been transferred on our books, we and the transfer agent may treat the record holder of the unit as the absolute owner for all purposes, except as otherwise required by law or stock exchange regulations.

We may, at our discretion, treat the nominee holder of a Common Unit as the absolute owner. In that case, the beneficial holder’s rights are limited solely to those that it has against the nominee holder as a result of any agreement between the beneficial owner and the nominee holder.

Common Units are securities and any transfers are subject to the laws governing transfers of securities.

DESCRIPTION OF THE CLASS B PREFERRED UNITS

General

On January 31, 2018 (the “Closing Date”), we completed a private placement of $15 million aggregate principal amount of Class B Preferred Units pursuant to a purchase agreement (the “Purchase Agreement”), by and among the Partnership and each of the purchasers named therein (collectively, the “Purchasers”). Pursuant to the Purchase Agreement, the Purchasers acquired the Class B Preferred Units at a price of $1.53 per Class B Preferred Unit (the “Class B Unit Purchase Price”). The Class B Preferred Units represent a separate class of our limited partnership interests. As of April 24, 2018, there were 9,803,921 Class B Preferred Units issued and outstanding.

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The following description of the Class B Preferred Units is subject to and qualified in its entirety by reference to our partnership agreement. We suggest that you read the complete text of our partnership agreement, which we have incorporated by reference as an exhibit to the registration statement of which this prospectus is a part.

Distributions

The Class B Preferred Units are entitled to a cumulative distribution (the “Class B Preferred Distribution”) of $0.0306 per quarter (the “Class B Preferred Distribution Amount”), subject to certain adjustments described in the partnership agreement. Each Class B Preferred Distribution shall be paid in cash at the Class B Preferred Distribution Amount; provided, however, that if our credit agreement prohibits us from paying the Class B Preferred Distribution in cash in respect of any quarter, then the Class B Preferred Distribution for such quarter shall be paid in additional Class B Preferred Units (“PIK Units”) and the Class B Preferred Distribution Amount for such quarter shall be $0.03825, subject to certain adjustments. If we fail to pay the Class B Preferred Distribution in full for any quarter, then until such time as all accrued and unpaid Class B Preferred Distributions are paid in full in cash, we will not be permitted to declare or make any distributions in respect of (a) any Junior Securities (as such term is defined in the partnership agreement), including the Common Units, or (b) any Class B Parity Securities (as such term is defined in the partnership agreement), other than the Class B Preferred Units; provided, however, that distributions may be declared and paid in respect of the Class B Preferred Units and any Class B Parity Securities, as long as such distributions are declared and paid pro rata such that the amounts of distributions declared per Class B Preferred Unit and per unit of such Class B Parity Security shall in all cases bear to each other the same ratio that accrued but unpaid and accumulated distributions per Class B Preferred Unit and per unit of such Class B Parity Security bear to each other.

Conversion

At any time during the period beginning on the six month anniversary of the Closing Date and ending on the business day immediately prior to the fifth anniversary of the Class A Closing Date (as defined in the partnership agreement), each holder of Class B Preferred Units shall have the right, at its sole election, to convert all or any portion of the Class B Preferred Units held by such holder, in an aggregate amount equaling or exceeding the Class B Minimum Conversion Amount (as defined in the partnership agreement), into Common Units on a one-for-one basis (subject to adjustment for splits, reverse splits, subdivisions, combinations and reclassifications). Upon any such conversion of Class B Preferred Units, the Partnership shall pay any accrued but unpaid and accumulated distributions on such Class B Preferred Units in cash.

Rights upon a Change of Control

Upon a Class B Change of Control (as defined in the partnership agreement), each holder of Class B Preferred Units shall have the right, at its election, to (i) if the Partnership is the surviving entity following such Class B Change of Control, continue to hold Class B Preferred Units; or (ii) convert all or any portion of the Class B Preferred Units held by such holder into Common Units on a one-for-one basis (subject to adjustment for splits, reverse splits, subdivisions, combinations and reclassifications). If any Class B Preferred Units remain outstanding following a Class B Change of Control in which the Partnership is not the surviving entity, then immediately following effectiveness of such Class B Change of Control, the Partnership shall redeem in cash all, but not less than all, of the outstanding Class B Preferred Units at a price per Class B Preferred Unit equal to the Class B Unit Purchase Price multiplied by the change of control redemption multiple then in effect. Upon any such conversion or redemption of Class B Preferred Units, the Partnership shall pay any accrued but unpaid and accumulated distributions on such Class B Preferred Units in cash.

Redemption

On the fifth anniversary of the Class A Closing Date, each holder of Class B Preferred Units shall have the right to cause the Partnership to redeem all or any portion of such holder’s outstanding Class B Preferred Units

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for cash at the Class B Unit Purchase Price, subject to the payment of any accrued but unpaid distributions to the date of such redemption. Any Class B Preferred Units that are outstanding immediately following such redemption will automatically be converted to Common Units on a one-for-one basis (subject to adjustment for splits, reverse splits, subdivisions, combinations and reclassifications). Upon any such redemption or conversion of Class B Preferred Units, the Partnership shall pay any accrued but unpaid and accumulated distributions on such Class B Preferred Units in cash.

Voting

The Class B Preferred Units vote together with the Common Units as a single class, with each Class B Preferred Unit having such voting rights as such Class B Preferred Unit would have if it were converted into Common Units, at the conversion rate then in effect, except that the Class B Preferred Units shall be entitled to vote as a separate class on any matter on which all unitholders are entitled to vote that adversely affects the rights, powers, privileges or preferences of the Class B Preferred Units in relation to the Partnership’s other classes or series of equity interests. The consent of a majority of the then-outstanding Class B Preferred Units, with one vote per Class B Preferred Unit, shall be required to approve any matter for which the Class B Preferred Unit holders are entitled to vote as a separate class.

Liquidation

The Class B Preferred Units rank senior to the Junior Securities (as defined in the partnership agreement), including the Common Units, and pari passu with the Partnership’s Class A Preferred Units (the “Class A Preferred Units,” and together with the Class B Preferred Units, the “Preferred Units”) in respect of liquidation. Upon liquidation, each holder of Class B Preferred Units shall be entitled to receive, in respect of each Class B Preferred Unit then owned, a liquidation preference equal to the sum of the Class B Unit Purchase Price (subject to adjustments for any splits, combinations or recapitalization with respect to the Class B Preferred Units), plus all accrued but unpaid and accumulated distributions, if any, on such Class B Preferred Unit to, but not including, the liquidation date.

Transfer Agent and Registrar

EQ Shareowner Services serves as transfer agent and registrar for the Class B Preferred Units. The transfer agent may resign, by notice to us, or be removed by us. The resignation or removal of the transfer agent will become effective upon our appointment of a successor transfer agent and registrar and its acceptance of the appointment. If no successor is appointed, our general partner may act as the transfer agent and registrar until a successor is appointed.

Registration Rights

On January 31, 2018, we entered into a registration rights agreement with the Purchasers, pursuant to which we agreed to register the Common Units issuable upon conversion of the Class B Preferred Units, including Common Units issuable upon conversion of any PIK Units, and granted piggyback registration rights, in each case as described in the registration rights agreement.

THE PARTNERSHIP AGREEMENT

The following is a summary of the material provisions of our partnership agreement. We will provide prospective investors with a copy of our partnership agreement upon request at no charge.

We summarize the following provisions of our partnership agreement elsewhere in this prospectus:

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Organization and Duration

Our partnership was organized in July 2011 and will have a perpetual existence unless terminated pursuant to the terms of our partnership agreement.

Purpose

Our purpose under our partnership agreement is to engage directly in, or enter into or form, hold and dispose of any corporation, partnership, joint venture, limited liability company or other arrangement to engage directly in, any business activity that is approved by our general partner and that lawfully may be conducted by a limited partnership organized under Delaware law and, in connection therewith, to exercise all of the rights and powers conferred upon us pursuant to the agreements relating to such business activity and do anything necessary or appropriate to the foregoing. However, our general partner may not cause us to engage in any business activity that it determines would be reasonably likely to cause us to be treated as an association taxable as a corporation or otherwise taxable as an entity for federal income tax purposes.

Although our general partner has the ability to cause us and our subsidiary to engage in activities other than the ownership, acquisition and development of oil and natural gas properties and the ownership, acquisition and operation of related assets, our general partner has no current plans to do so and may decline to do so free of any fiduciary duty or obligation whatsoever to us or our limited partners, including any duty to act in good faith or in the best interests of us or our limited partners. Our general partner is generally authorized to perform all acts it determines to be necessary or appropriate to carry out our purposes and to conduct our business.

Cash Distributions

Our partnership agreement specifies the manner in which we will make cash distributions to the holders of our Common Units, Preferred Units and other partnership interests as well as to our general partner in respect of its general partner interest. For a description of these cash distribution provisions, please read “Provisions of Our Partnership Agreement Relating to Cash Distributions.”

In October 2015, cash distributions to the holders of our Common Units were indefinitely suspended. Our credit agreement stipulates written consent from our lenders is required in order to reinstate distributions.

Capital Contributions

Unitholders are not obligated to make additional capital contributions, except as described under “—Limited Liability.”

For a discussion of our general partner’s right to contribute capital to maintain the level of its general partner interest if we issue additional units, please read “—Issuance of Additional Interests.”

Limited Voting Rights

The following is a summary of the unitholder vote required for each of the matters specified below.

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The Preferred Units vote together with the Common Units as a single class. Various matters require the approval of a “unit majority,” which means the approval of a majority of the outstanding Common Units and Preferred Units voting as a single class, with each Preferred Unit having such voting rights as such Preferred Unit would have if it were converted into Common Units, at the conversion rate then in effect.

The Class A Preferred Units shall be entitled to vote as a separate class on any matter on which all unitholders are entitled to vote that adversely affects the rights, powers, privileges or preferences of the Class A Preferred Units in relation to the Partnership’s other classes or series of equity interests. The consent of the majority of the then-outstanding Class A Preferred Units, voting as a separate class with one vote per Class A Preferred Unit, shall be required to approve any matter requiring the approval of a “Class A Preferred Unit majority.”

The Class B Preferred Units shall be entitled to vote as a separate class on any matter on which all unitholders are entitled to vote that adversely affects the rights, powers, privileges or preferences of the Class B Preferred Units in relation to the Partnership’s other classes or series of equity interests. The consent of the majority of the then-outstanding Class B Preferred Units, voting as a separate class with one vote per Class B Preferred Unit, shall be required to approve any matter requiring the approval of a “Class B Preferred Unit majority.”

In voting their Common Units and Preferred Units, as applicable, our general partner, and our general partner’s affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III) will have no fiduciary duty or obligation whatsoever to us or the limited partners, including any duty to act in good faith or in the best interests of us or our limited partners.

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Applicable Law; Forum, Venue and Jurisdiction

Our partnership agreement is governed by Delaware law. Our partnership agreement requires that any claims, suits, actions or proceedings:

shall be exclusively brought in the Court of Chancery of the State of Delaware (or, if such court does not have subject matter jurisdiction thereof, any other court in the State of Delaware with subject matter jurisdiction), in each case, regardless of whether such claims, suits, actions or proceedings sound in contract, tort, fraud or otherwise, are based on common law, statutory, equitable, legal or other grounds, or are derivative or direct claims. By purchasing a Common Unit, a limited partner (i) irrevocably submits to the exclusive jurisdiction of such courts in connection with any such claim, suit, action or proceedings; (ii) irrevocably agrees not to, and waives any right to, assert in any such claim, suit, action or proceeding that (A) it is not personally subject to the jurisdiction of such courts or of any other court to which proceedings in such courts may be appealed, (B) such claim, suit, action or proceeding is brought in an inconvenient forum, or (C) the venue of such claim, suit, action or proceeding is improper; (iii) expressly waives any requirement for the posting of a bond by a party bringing such claim, suit, action or proceeding; (iv) consents to process being served in any such claim, suit, action or

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proceeding by (X) mailing, certified mail, return receipt requested, a copy thereof to such party at the address in effect for notices under our partnership agreement or (Y) any other manner permitted by law; and (v) irrevocably waives any and all right to trial by jury in any such claim, suit, action or proceeding.

Limited Liability

Assuming that a limited partner does not participate in the control of our business within the meaning of the Delaware Act and that he otherwise acts in conformity with the provisions of our partnership agreement, his liability under the Delaware Act will be limited, subject to possible exceptions, to the amount of capital he is obligated to contribute to us for his units plus his share of any undistributed profits and assets. If it were determined, however, that the right or exercise of the right by our limited partners as a group:

constituted “participation in the control” of our business for the purposes of the Delaware Act, then our limited partners could be held personally liable for our obligations under Delaware law, to the same extent as our general partner. This liability would extend to persons who transact business with us and reasonably believe that the limited partner is a general partner. Neither our partnership agreement nor the Delaware Act specifically provides for legal recourse against our general partner if a limited partner were to lose limited liability through any fault of our general partner. While this does not mean that a limited partner could not seek legal recourse, we know of no precedent for this type of a claim in Delaware case law.

Under the Delaware Act, a limited partnership may not make a distribution to a partner if, after the distribution, all liabilities of the limited partnership, other than liabilities to partners on account of their partnership interests and liabilities for which the recourse of creditors is limited to specific property of the partnership, would exceed the fair value of the assets of the limited partnership. For the purpose of determining the fair value of the assets of a limited partnership, the Delaware Act provides that the fair value of property subject to liability for which recourse of creditors is limited shall be included in the assets of the limited partnership only to the extent that the fair value of that property exceeds the nonrecourse liability. The Delaware Act provides that a limited partner who receives a distribution and knew at the time of the distribution that the distribution was in violation of the Delaware Act shall be liable to the limited partnership for the amount of the distribution for three years. Under the Delaware Act, a substituted limited partner of a limited partnership is liable for the obligations of his assignor to make contributions to the partnership, except that such person is not obligated for liabilities unknown to him at the time he became a limited partner and that could not be ascertained from the partnership agreement.

Our subsidiaries conduct business in Oklahoma, Louisiana, Wyoming and Texas, and we may have operating subsidiaries that conduct business in other states in the future. Maintenance of our limited liability as an owner of our operating subsidiary may require compliance with legal requirements in the jurisdictions in which our operating subsidiary conducts business, including qualifying our operating subsidiary to do business there.

Limitations on the liability of members or limited partners for the obligations of a limited liability company or limited partnership have not been clearly established in many jurisdictions. If, by virtue of our ownership in our subsidiary or otherwise, it were determined that we were conducting business in any state without compliance with the applicable limited partnership or limited liability company statute, or that the right or exercise of the right by our limited partners as a group to remove or replace our general partner, to approve some amendments to our partnership agreement, or to take other action under our partnership agreement constituted “participation in the control” of our business for purposes of the statutes of any relevant jurisdiction, then our

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limited partners could be held personally liable for our obligations under the law of that jurisdiction to the same extent as our general partner under the circumstances. We will operate in a manner that our general partner considers reasonable and necessary or appropriate to preserve the limited liability of our limited partners.

Issuance of Additional Interests

Our partnership agreement authorizes us to issue an unlimited number of additional partnership interests and options, rights, warrants, restricted units, appreciation rights, phantom or tracking interests or other economic interests in us or in our securities for the consideration and on the terms and conditions determined by our general partner without the approval of our unitholders. However, the creation and issuance of any class of Senior Securities (as such term is defined in our partnership agreement) requires approval of a majority of the Class A Preferred Units and a majority of the Class B Preferred Units, and the creation and issuance of any class of Class A Parity Securities or Class B Parity Securities (as such terms are defined in our partnership agreement) requires approval of a majority of the Class A Preferred Units or Class B Preferred Units, as applicable, voting as a separate class.

It is possible that we will fund acquisitions through the issuance of additional Common Units or other partnership interests. Holders of any additional Common Units we issue will be entitled to share equally with the then-existing holders of Common Units in our distributions of available cash. In addition, the issuance of additional Common Units or other partnership interests may dilute the value of the interests of the then-existing holders of Common Units in our net assets.

In accordance with Delaware law and the provisions of our partnership agreement, we may also issue additional partnership interests that, as determined by our general partner, may have special voting rights to which the Common Units are not entitled. In addition, our partnership agreement does not prohibit the issuance by our subsidiary of equity interests, which may effectively rank senior to our Common Units.

If we issue additional partnership interests (other than the issuance of partnership interests upon conversion of any outstanding partnership interests that may be converted into Common Units), our general partner is entitled, but not required, to make additional capital contributions to the extent necessary to maintain the level of its general partner interest in us. Our general partner’s approximate 1.2% general partner interest in us will be reduced if we complete any such issuance of partnership interests in the future and our general partner does not contribute a proportionate amount of capital to us to maintain its general partner interest in us. Moreover, our general partner will have the right, which it may from time to time assign in whole or in part to any of its affiliates, to purchase Common Units or other partnership interests whenever, and on the same terms that, we issue those interests to persons other than our general partner and its affiliates, to the extent necessary to maintain the aggregate percentage interest in us of our general partner and its affiliates, including such interest represented by Common Units or other partnership interests, that existed immediately prior to each issuance. The holders of Common Units will not have preemptive rights to acquire additional Common Units or other partnership interests.

Amendment of the Partnership Agreement

General

Amendments to our partnership agreement may be proposed only by our general partner. However, our general partner will have no duty or obligation to propose any amendment and may decline to do so free of any fiduciary duty or obligation whatsoever to us or our limited partners, including any duty to act in good faith and in the best interests of us or our limited partners. To adopt a proposed amendment, other than the amendments discussed below under “—No Unitholder Approval,” our general partner is required to seek written approval of the holders of the number of units required to approve the amendment or call a meeting of our limited partners to consider and vote upon the proposed amendment. Except as described below, an amendment must be approved

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by a unit majority. In addition, the affirmative vote of a majority of the applicable class of Preferred Units is required prior to amending the partnership agreement:

Prohibited Amendments

No amendment may:

The provision of our partnership agreement preventing the amendments having the effects described in any of the clauses above can be amended upon the approval of the holders of at least 90% of the outstanding units (including units owned by our general partner, our general partner’s affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III)) or upon receipt of a written opinion of counsel acceptable to our general partner to the effect that such amendment will not affect the limited liability of any limited partner under the Delaware Act.

No Unitholder Approval

Our general partner may generally make amendments to our partnership agreement without the approval of any limited partner to reflect:

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In addition, our general partner may make amendments to our partnership agreement without the approval of any limited partner if our general partner determines that those amendments:

Opinion of Counsel and Unitholder Approval

Our general partner will not be required to obtain an opinion of counsel that an amendment will not result in a loss of limited liability to our limited partners or result in our being treated as an association taxable as a corporation or otherwise taxable as an entity for federal income tax purposes in connection with any of the amendments described above under “—No Unitholder Approval.” No other amendments to our partnership agreement will become effective without the approval of holders of at least 90% of the outstanding units unless we first obtain an opinion of counsel to the effect that the amendment will not affect the limited liability under Delaware law of any of our limited partners.

In addition to the above restrictions, any amendment that would have a material adverse effect on the rights or preferences of any type or class of outstanding units in relation to other classes of units will require the approval of at least a majority of the type or class of units so affected, but no vote will be required by any class or classes or type or types of limited partners that our general partner determines are not adversely affected in any material respect. Any amendment that reduces the voting percentage required to take any action other than to remove the general partner or call a meeting of unitholders must be approved by the affirmative vote of partners

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holding aggregate partnership interests constituting not less than the voting requirement sought to be reduced. Any amendment that would increase the percentage of units required to remove the general partner or call a meeting of unitholders must be approved by the affirmative vote of limited partners whose aggregate outstanding units constitute not less than the percentage sought to be increased.

Merger, Consolidation, Sale or Other Disposition of Assets

A merger or consolidation of us requires the prior consent of our general partner. However, our general partner will have no duty or obligation to consent to any merger or consolidation and may decline to do so free of any duty (including any fiduciary duty) or obligation whatsoever to us or our limited partners, including any duty to act in good faith and in the best interest of us or our limited partners.

In addition, our partnership agreement generally prohibits our general partner, without the prior approval of the holders of a unit majority, from causing us, among other things, to sell, exchange or otherwise dispose of all or substantially all of our and our subsidiary’s assets (taken as a whole) in a single transaction or a series of related transactions, including by way of merger, consolidation or other combination or sale of ownership interests of our subsidiary. Our general partner may, however, mortgage, pledge, hypothecate or grant a security interest in all or substantially all of our assets without such approval. Our general partner may also sell all or substantially all of our assets under a foreclosure or other realization upon those encumbrances without such approval. Finally, our general partner may consummate any merger or consolidation without the prior approval of our unitholders if we are the surviving entity in the transaction, our general partner has received an opinion of counsel regarding limited liability and tax matters, the merger or consolidation will not result in a material amendment to our partnership agreement (other than an amendment that the general partner could adopt without the consent of other partners), each of our partnership interests outstanding immediately prior to the merger or consolidation will be an identical partnership interest of our partnership following the transaction, and the number partnership interests to be issued in such merger or consolidation does not exceed 20% of our outstanding partnership interests immediately prior to the effective date of such merger or consolidation.

If the conditions specified in our partnership agreement are satisfied, our general partner may convert us or our subsidiary into a new limited liability entity or merge us or our subsidiary into, or convey all of our assets to, a newly formed entity that has no assets, liabilities or operations at the time of such conversion, merger or conveyance, if the sole purpose of that conversion, merger or conveyance is to effect a mere change in our legal form into another limited liability entity, our general partner has received an opinion of counsel regarding limited liability and tax matters, and the governing instruments of the new entity provide our limited partners and our general partner with substantially the same rights and obligations as contained in our partnership agreement. The unitholders are not entitled to dissenters’ rights of appraisal under our partnership agreement or applicable Delaware law in the event of a conversion, merger or consolidation, a sale of substantially all of our assets or any other similar transaction or event.

Dissolution

We will continue as a limited partnership until dissolved under our partnership agreement. We will dissolve upon:

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Upon a dissolution under the last clause above, the holders of a unit majority may also elect, within specific time limitations, to continue our business on the same terms and conditions described in our partnership agreement by appointing as a successor general partner an entity approved by the holders of a unit majority, subject to our receipt of an opinion of counsel to the effect that:

Liquidation and Distribution of Proceeds

Upon our dissolution, unless our business is continued, the liquidator authorized to wind up our affairs will, acting with all of the powers of our general partner that are necessary or appropriate, liquidate our assets and apply the proceeds of the liquidation as described in “Provisions of Our Partnership Agreement Relating to Cash Distributions—Distributions of Cash Upon Liquidation.” The liquidator may defer liquidation or distribution of our assets for a reasonable period of time or distribute assets to partners in kind if it determines that a sale would be impractical or would cause undue loss to our partners.

Withdrawal or Removal of Our General Partner

Except as described below, our general partner has agreed not to withdraw voluntarily as our general partner prior to December 31, 2021 without obtaining the approval of the holders of at least a majority of our outstanding Common Units, excluding Common Units held by our general partner and its affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III), and furnishing an opinion of counsel regarding limited liability and tax matters. On or after December 31, 2021, our general partner may withdraw as our general partner without first obtaining approval of any unitholder by giving at least 90 days’ written notice, and that withdrawal will not constitute a violation of our partnership agreement. Notwithstanding the information above, our general partner may withdraw as our general partner without unitholder approval upon 90 days’ notice to our limited partners if at least 50% of the outstanding Common Units are held or controlled by one person and its affiliates other than our general partner and its affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III). In addition, subject to the restrictions set forth in our partnership agreement, on or after December 31, 2021, our general partner may sell or otherwise transfer all of its general partner interest in us without the approval of the unitholders. Please read “—Transfer of General Partner Interest.”

Upon withdrawal of our general partner under any circumstances, other than as a result of a transfer by our general partner of all or a part of its general partner interest in us, the holders of a unit majority may, prior to the effective date of such withdrawal, elect a successor to the withdrawing general partner. If a successor is not elected, or is elected but an opinion of counsel regarding limited liability and tax matters is not obtained, we will be dissolved, wound up and liquidated, unless within a specified period of time after that withdrawal, the holders of a unit majority agree in writing to continue our business and to appoint a successor general partner. Please read “—Dissolution.”

Our general partner may not be removed unless that removal is approved by the vote of the holders of not less than 66% of our outstanding units, including units held by our general partner, our general partner’s affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III), and we receive an opinion of counsel regarding limited liability and tax matters. Any removal of our general partner is also subject to the approval of a successor general partner by the vote of the holders of a majority of our outstanding Common Units, voting as a separate class. The ownership of more than 33% of our outstanding units by our general partner, our general partner’s affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III) would give them the practical ability to prevent our general partner’s removal.

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Our partnership agreement also provides that if our general partner is removed as our general partner under circumstances where cause does not exist our general partner will have the right to convert its general partner interest into Common Units or to receive cash in exchange for those interests based on the fair market value of the interests at the time.

In the event of removal of our general partner under circumstances where cause exists or withdrawal of our general partner where that withdrawal violates our partnership agreement, a successor general partner will have the option to purchase the departing general partner’s general partner interest for a cash payment equal to the fair market value of those interests. Under all other circumstances where our general partner withdraws or is removed by the limited partners, the departing general partner will have the option to require the successor general partner to purchase the general partner interest of the departing general partner for fair market value. In each case, this fair market value will be determined by agreement between the departing general partner and the successor general partner. If no agreement is reached within the period provided under our partnership agreement, an independent investment banking firm or other independent expert selected by the departing general partner and the successor general partner will determine the fair market value. If the departing general partner and the successor general partner cannot agree upon one independent investment banking firm or other independent expert, then an independent investment banking firm or other independent expert chosen by agreement of the independent investment banking firm or other independent expert selected by each of them will determine the fair market value.

If the option described above is not exercised by either the departing general partner or the successor general partner, the departing general partner will become a limited partner and such general partner interest will automatically convert into Common Units equal to the fair market value of those interests as determined by an investment banking firm or other independent expert selected in the manner described in the preceding paragraph.

In addition, we will be required to reimburse the departing general partner for all amounts due the departing general partner, including, without limitation, all employee-related liabilities, including severance liabilities, incurred for the termination of any employees employed by the departing general partner or its affiliates for our benefit.

Transfer of General Partner Interest

Except for the transfer by our general partner of all, but not less than all, of its general partner interest to:

our general partner may not transfer all or any part of its general partner interest to another person prior to December 31, 2021, without the approval of the holders of at least a majority of our outstanding Common Units, excluding Common Units held by our general partner and its affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III). As a condition of this transfer, the transferee must agree to purchase all (or the appropriate portion thereof, if applicable) of the partnership or membership interests held by our general partner as the general partner or managing member, if any, of us or our subsidiary and must assume, among other things, the rights and duties of our general partner, agree to be bound by the provisions of our partnership agreement, and furnish an opinion of counsel regarding limited liability and tax matters.

Our general partner, our general partner’s affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III) may at any time transfer Common Units to one or more persons without unitholder approval.

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Transfer of Ownership Interests in Our General Partner

At any time, the members of our general partner may sell or transfer all or part of their membership interests in our general partner to an affiliate or a third party without the approval of our unitholders.

Change of Management Provisions

Our partnership agreement contains specific provisions that are intended to discourage a person or group from attempting to remove our general partner or otherwise change the management of our general partner. If any person or group (other than (i) Charles R. Olmstead, Jeffrey R. Olmstead and Yorktown and their respective affiliates, (ii) a direct transferee of the general partner or its affiliates (except the partnership) or (iii) any direct or indirect transferee of the foregoing or any other person or group who the general partner has notified otherwise, including a transferee of the partnership) acquires beneficial ownership of 20% or more of any class of units, that person or group loses voting rights with respect to all of such partnership interests. This loss of voting rights does not apply to any person or group that acquires partnership interests directly from our general partner or its affiliates and any transferees of that person or group approved by our general partner or to any person or group who acquires partnership interests with the prior approval of the board of directors of our general partner.

If our general partner is removed without cause, our partnership agreement provides that, among other things, our general partner will have the right to convert its general partner interest into Common Units or receive cash in exchange for those interests.

Limited Call Right

If at any time our general partner and its affiliates (including Charles R. Olmstead, Jeffrey R. Olmstead and Mid-Con III) own more than 80% of our then-issued and outstanding limited partner interests of any class, our general partner will have the right, which it may assign and transfer in whole or in part to any of its affiliates or to us, to purchase all, but not less than all, of the limited partner interests of the class held by unaffiliated persons as of a record date to be selected by our general partner, on at least 10 but not more than 60 days’ notice. The purchase price in the event of this purchase is the greater of:

As a result of our general partner’s right to purchase outstanding limited partner interests, a holder of limited partner interests may have his limited partner interests purchased at an undesirable time or price. The federal income tax consequences to a unitholder of the exercise of this call right are the same as a sale by that unitholder of his Common Units in the market. Please read “Material Tax Considerations — Disposition of Units.”

Meetings; Voting

Except as described below regarding a person or group owning 20% or more of any class of partnership interests then outstanding, record holders of limited partner interests on the record date will be entitled to notice of, and to vote at, meetings of our limited partners and to act upon matters for which approvals may be solicited. Units that are owned by non-citizens or other ineligible holders will be voted by our general partner and our general partner will cast the votes on those units in the same ratios as the votes of limited partners on other units are cast. Please read “—Non-Citizen Unitholders; Redemption” for additional information concerning the citizenship, nationality, and related status requirements for owning our Common Units.

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Our general partner does not anticipate that any meeting of unitholders will be called in the foreseeable future. If authorized by our general partner, any action that is required or permitted to be taken by the unitholders may be taken either at a meeting of the unitholders or without a meeting if an approval in writing or by electronic transmission is signed or transmitted by holders of not less than the number of units necessary to authorize or take that action at a meeting. Meetings of the unitholders may be called by our general partner or by unitholders owning at least 20% of the outstanding units of the class for which a meeting is proposed. Unitholders may vote either in person or by proxy at meetings. The holders of a majority of the outstanding units of the class or classes for which a meeting has been called, represented in person or by proxy, will constitute a quorum unless any action by the unitholders requires approval by holders of a greater percentage of the units, in which case the quorum will be the greater percentage.

Each record holder of a unit has a vote according to his percentage interest in us, although additional limited partner interests having special voting rights could be issued. Please read “—Issuance of Additional Interests.” However, if at any time any person or group (other than (i) Charles R. Olmstead, Jeffrey R. Olmstead and Yorktown and their respective affiliates, (ii) a direct transferee of the general partner or its affiliates (except the partnership) or (iii) any direct or indirect transferee of the foregoing or any other person or group who the general partner has notified otherwise, including a transferee of the partnership) acquires, in the aggregate, beneficial ownership of 20% or more of any class of partnership interests then outstanding, that person or group will lose voting rights with respect to all of such partnership interests and the units may not be voted on any matter and will not be considered to be outstanding when sending notices of a meeting of unitholders, calculating required votes or, determining the presence of a quorum or for other similar purposes. Common Units held in nominee or street name account will be voted by the broker or other nominee in accordance with the instruction of the beneficial owner unless the arrangement between the beneficial owner and his nominee provides otherwise.

Any notice, demand, request, report or proxy material required or permitted to be given or made to record holders of Common Units under our partnership agreement will be delivered to the record holder by us or by the transfer agent.

Status as Limited Partner

Upon a transfer of any class of units in accordance with our partnership agreement, each transferee of units shall be admitted as a limited partner with respect to the units transferred when such transfer and admission is reflected in our books and records and such limited partner becomes the record holder of the units so transferred. Except as described under “—Limited Liability,” the Common Units and Preferred Units will be fully paid, and unitholders will not be required to make additional contributions.

Non-Citizen Unitholders; Redemption

We have interests in oil and natural gas leases on United States federal lands. To comply with certain U.S. laws relating to the ownership of interests in oil and natural gas leases on federal lands, our general partner, acting on our behalf, may request any unitholder to furnish to the general partner within 30 days of the request a properly completed certificate certifying as to the unitholder’s nationality, citizenship or other related status. If, following a request by our general partner, a unitholder fails to furnish such certification within the 30-day period or if the general partner determines, with the advice of counsel, that the unitholder’s nationality, citizenship or other related status would create a substantial risk of cancellation or forfeiture of property in which the we have an interest, we will have the right to redeem the units held by such unitholder. Further, the units held by such unitholder will not be entitled to any voting rights. The redemption price will be paid in cash or delivery of a promissory note, as determined by our general partner. If our general partner chooses to redeem the units in cash, the redemption price will be the average of the daily closing prices per unit for the 20 consecutive trading days immediately prior to the date set for redemption. If our general partner chooses to redeem the units with a promissory note, the promissory note will bear interest at the rate of 5% annually and be payable in three equal annual installments of principal and accrued interest, commencing one year after the redemption date.

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For the avoidance of doubt, onshore mineral leases or any direct or indirect interest therein may be acquired and held by aliens only through stock ownership, holding or control in a corporation organized under the laws of the United States or of any state thereof.

Indemnification

Under our partnership agreement, in most circumstances, we will indemnify the following persons, to the fullest extent permitted by law, from and against all losses, claims, damages or similar events whether civil, criminal, administrative or investigative, and whether formal or informal and including appeals:

Any indemnification under these provisions will only be out of our assets. Unless it otherwise agrees, our general partner will not be personally liable for, or have any obligation to contribute or lend funds or assets to us to enable us to effectuate, indemnification. We may purchase insurance covering liabilities asserted against and expenses incurred by persons for our activities, regardless of whether we would have the power to indemnify the person against liabilities under our partnership agreement.

Reimbursement of Expenses

Our partnership agreement requires us to reimburse our general partner for all direct and indirect expenses it incurs or payments it makes on behalf of us or our subsidiary and all other expenses allocable to us or otherwise incurred by our general partner in connection with operating our business. Our partnership agreement does not set a limit on the amount of expenses for which our general partner and our other affiliates, including Mid-Con Energy Operating, LLC, may be reimbursed. These expenses include salary, bonus, incentive compensation, employment benefits, and other amounts paid to persons who perform services for us or on our behalf, and expenses allocated to our general partner by its affiliates. Our general partner is entitled to determine in good faith the expenses that are allocable to us.

Books and Reports

Our general partner is required to keep appropriate books and records of our business at our principal offices. The books will be maintained for both tax and financial reporting purposes on an accrual basis in accordance with GAAP. For financial reporting and tax purposes, our fiscal year end is December 31.

We will furnish or make available to record holders of Common Units, within 100 days after the close of each fiscal year, an annual report containing audited financial statements, including a balance sheet and statements of operations, partnership equity and cash flows and a report on those financial statements by our independent registered public accounting firm. Except for our fourth quarter, we will also furnish or make available within 50 days after the close of each quarter, a report containing unaudited financial statements and such other information as may be received by applicable law, regulation or NASDAQ rule, or as our general partner determines to be necessary or appropriate.

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Our general partner will be deemed to have made a report available if it has either filed such report with the SEC and such report is publicly available or made such report available on any publicly available website maintained by us.

The tax information reasonably required for federal, state and local income tax reporting purposes will be furnished within 90 days of the close of the calendar year in which our taxable period ends.

Right to Inspect Our Books and Records

Our partnership agreement provides that a limited partner can, for a purpose reasonably related to his interest as a limited partner, upon reasonable written demand stating the purpose of such demand and at his own expense, obtain:

Our general partner may, and intends to, keep confidential from the limited partners trade secrets or other information the disclosure of which our general partner believes in good faith is not in our best interests or that we are required by law or by agreements with third parties to keep confidential.

Registration Rights

Under our partnership agreement, our general partner and its affiliates as of the date of our initial public offering (including Charles R. Olmstead, Jeffrey R. Olmstead, Mid-Con III and Yorktown) have the right to cause us to register for resale under the Securities Act and applicable state securities laws any Common Units or other partnership interests proposed to be sold by our general partner or any of its affiliates or their assignees if an exemption from the registration requirements is not otherwise available. In addition, our general partner and its affiliates as of the date of our initial public offering (including Charles R. Olmstead, Jeffrey R. Olmstead, Mid-Con III and Yorktown) have the right to include such securities in a registration by us or any other unitholder, subject to customary exceptions. These registration rights continue for two years following the withdrawal or removal of our general partner and for so long as is required for the holder to sell all of the partnership interests with respect to which it has requested registration during such two-year period. In addition, we are restricted from granting any superior piggyback registration rights during this two-year period. We will pay all expenses incidental to the registration, excluding underwriting fees and discounts. In connection with any registration of this kind, we will indemnify the unitholders participating in the registration and their officers, directors and controlling persons from and against specified liabilities, including under the Securities Act or any applicable state securities laws.

PROVISIONS OF OUR PARTNERSHIP AGREEMENT RELATING TO CASH DISTRIBUTIONS

Set forth below is a summary of the significant provisions of our partnership agreement that relate to cash distributions. The information presented in this section assumes that our general partner will continue to make capital contributions to us in order to maintain its general partner interest, which for purposes of this section we have assumed is approximately 1.2%.

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Distributions to Class A Preferred Units

The Class A Preferred Units are entitled to the Class A Preferred Distribution of $0.043 per quarter, subject to certain adjustments described in the partnership agreement. Each Class A Preferred Distribution shall be paid in cash at the Class A Preferred Distribution Amount; provided, however, that if our credit agreement prohibits us from paying the Class A Preferred Distribution in cash in respect of any quarter, then the Class A Preferred Distribution for such quarter shall be paid in Class A PIK Units and the Class A Preferred Distribution Amount for such quarter shall be $0.05375, subject to certain adjustments. If we fail to pay the Class A Preferred Distribution in full for any quarter, then until such time as all accrued and unpaid Class A Preferred Distributions are paid in full in cash, we will not be permitted to declare or make any distributions in respect of (a) any Junior Securities (as such term is defined in the partnership agreement), including the Common Units, or (b) any Class A Parity Securities (as such term is defined in the partnership agreement), other than the Class A Preferred Units; provided, however, that distributions may be declared and paid in respect of the Class A Preferred Units and any Class A Parity Securities, as long as such distributions are declared and paid pro rata such that the amounts of distributions declared per Class A Preferred Unit and per unit of such Class A Parity Security shall in all cases bear to each other the same ratio that accrued but unpaid and accumulated distributions per Class A Preferred Unit and per unit of such Class A Parity Security bear to each other.

Distributions to Class B Preferred Units

The Class B Preferred Units are entitled to the Class B Preferred Distribution of $0.0306 per quarter, subject to certain adjustments described in the partnership agreement. Each Class B Preferred Distribution shall be paid in cash at the Class B Preferred Distribution Amount; provided, however, that if our credit agreement prohibits us from paying the Class B Preferred Distribution in cash in respect of any quarter, then the Class B Preferred Distribution for such quarter shall be paid in Class B PIK Units and the Class B Preferred Distribution Amount for such quarter shall be $0.03825, subject to certain adjustments. If we fail to pay the Class B Preferred Distribution in full for any quarter, then until such time as all accrued and unpaid Class B Preferred Distributions are paid in full in cash, we will not be permitted to declare or make any distributions in respect of (a) any Junior Securities (as such term is defined in the partnership agreement), including the Common Units, or (b) any Class B Parity Securities (as such term is defined in the partnership agreement), other than the Class B Preferred Units; provided, however, that distributions may be declared and paid in respect of the Class B Preferred Units and any Class B Parity Securities, as long as such distributions are declared and paid pro rata such that the amounts of distributions declared per Class B Preferred Unit and per unit of such Class B Parity Security shall in all cases bear to each other the same ratio that accrued but unpaid and accumulated distributions per Class B Preferred Unit and per unit of such Class B Parity Security bear to each other.

Distributions of Available Cash

General

Subject to the payment of the Class A Preferred Distributions and Class B Preferred Distributions described above, our partnership agreement requires that, within 45 days after the end of each quarter, we will distribute all of our available cash to unitholders of record on the applicable record date. We will distribute our available cash to our common unitholders and general partner, pro rata. Unlike many publicly traded limited partnerships, our general partner is not entitled to any incentive distributions, and we do not have any subordinated units.

In October 2015, cash distributions to the holders of our Common Units were indefinitely suspended. Our credit agreement stipulates written consent from our lenders is required in order to reinstate distributions.

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Definition of Available Cash

Available cash, for any quarter, consists of all cash and cash equivalents on hand at the end of that quarter:

Distributions of Cash Upon Liquidation

General

If we dissolve in accordance with the partnership agreement, we will sell or otherwise dispose of our assets in a process called liquidation. We will first apply the proceeds of liquidation to the payment of our creditors and the liquidator in the order of priority provided in our partnership agreement and by law. Thereafter, we will distribute any remaining proceeds to our unitholders and our general partner, in accordance with their capital account balances, as adjusted to reflect any gain or loss upon the sale or other disposition of our assets in liquidation.

Manner of Adjustments for Gain

The manner of the adjustment for gain is set forth in the partnership agreement. Upon our liquidation, we will allocate any net gain (or unrealized gain attributable to assets distributed in kind to our partners) in the following manner:

Manner of Adjustments for Losses

Upon our liquidation, we will generally allocate any loss to our partners in the following manner:

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Adjustments to Capital Accounts

Our partnership agreement requires that we make adjustments to capital accounts upon the issuance of additional units. In this regard, our partnership agreement specifies that we allocate any unrealized and, for U.S. federal income tax purposes, unrecognized gain or loss resulting from the adjustments to the unitholders and our general partner in the same manner as we allocate gain or loss upon liquidation.

MATERIAL TAX CONSIDERATIONS

This section is a summary of the material U.S. federal income tax consequences that may be relevant to prospective common unitholders who are individual citizens or residents of the U.S. and, unless otherwise noted in the following discussion, is the opinion of Sidley Austin LLP, counsel to us, insofar as it relates to legal conclusions with respect to matters of U.S. federal income tax law. This section is based upon current provisions of the Internal Revenue Code of 1986, as amended, or the Internal Revenue Code, existing Treasury regulations promulgated under the Internal Revenue Code, or the Treasury Regulations, and current administrative rulings and court decisions, all of which are subject to change. Later changes in these authorities may cause the tax consequences to vary substantially from the consequences described below. Unless the context otherwise requires, references in this section to “us” or “we” are references to Mid-Con Energy Partners, LP and our operating subsidiary, and references to “unitholders” are references to holders of our common units.

The following discussion does not comment on all U.S. federal income tax matters affecting us or our unitholders and does not describe the application of the alternative minimum tax that may be applicable to certain unitholders. Moreover, the discussion focuses on unitholders who are individual citizens or residents of the U.S. and has only limited application to corporations, estates, entities treated as partnerships for U.S. federal income tax purposes, trusts, nonresident aliens, U.S. expatriates and former citizens or long-term residents of the United States or other unitholders subject to specialized tax treatment, such as banks, insurance companies and other financial institutions, tax-exempt institutions, foreign persons (including, without limitation, controlled foreign corporations, passive foreign investment companies and non-U.S. persons eligible for the benefits of an applicable income tax treaty with the United States), individual retirement accounts (IRAs), real estate investment trusts (REITs) or mutual funds, dealers in securities or currencies, traders in securities, U.S. persons whose “functional currency” is not the U.S. dollar, persons holding their units as part of a “straddle,” “hedge,” “conversion transaction” or other risk reduction transaction, persons subject to special tax accounting rules as a result of any item of gross income with respect to our common units being taken into account in an applicable financial statement and persons deemed to sell their units under the constructive sale provisions of the Internal Revenue Code. In addition, the discussion only comments, to a limited extent, on state, local and foreign tax consequences. Accordingly, we encourage each prospective unitholder to consult his own tax advisor in analyzing the U.S. federal, state, local and foreign tax consequences particular to him of the ownership or disposition of common units and potential changes in applicable tax laws, including the impact of the recently enacted U.S. tax reform legislation.

We are relying on the opinion of Sidley Austin LLP regarding our characterization as a partnership for tax purposes. An opinion of counsel represents only that counsel’s best legal judgment and does not bind the IRS or the courts. Accordingly, the opinions and statements made herein may not be sustained by a court if contested by the IRS. Any contest of this sort with the IRS may materially and adversely impact the market for common units and the prices at which common units trade. In addition, the costs of any contest with the IRS, principally legal, accounting and related fees, will result in a reduction in cash available for distribution to our unitholders and our

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general partner and thus will be borne indirectly by our unitholders and our general partner. Furthermore, the tax treatment of us, or of an investment in our common units, may be significantly modified by future legislative or administrative changes or court decisions. Any modifications may or may not be retroactively applied.

All statements as to matters of U.S. federal income tax law and legal conclusions with respect thereto, but not as to factual matters, contained in this section, unless otherwise noted, are the opinion of Sidley Austin LLP and are based on the accuracy of the representations made by us, as discussed below.

Notwithstanding the above and for the reasons described below, Sidley Austin LLP has not rendered an opinion with respect to the following specific U.S. federal income tax issues: (1) the treatment of a unitholder whose common units are the subject of a securities loan (e.g., a loan to a short seller to cover a short sale of common units) (please read “—Tax Consequences of Unit Ownership—Treatment of Securities Loans”); (2) whether our monthly convention for allocating taxable income and losses is permitted by existing Treasury Regulations (please read “—Disposition of Units—Allocations Between Transferors and Transferees”); (3) whether our method for taking into account Section 743 adjustments is sustainable in certain cases (please read “—Tax Consequences of Unit Ownership—Section 754 Election” and “—Uniformity of Units”); and (4) whether percentage depletion will be available to a unitholder or the extent of the percentage depletion deduction (please read “—Tax Treatment of Operations—Depletion Deductions”).

Partnership Status

We are treated as a partnership for U.S. federal income tax purposes and, therefore, subject to the discussion below under “—Administrative Matters—Information Returns and Audit Procedures”, generally will not be liable for entity-level U.S. federal income taxes. Instead, each partner of a partnership is required to take into account the partner’s share of items of income, gain, loss and deduction of the partnership in computing the partner’s U.S. federal income tax liability, regardless of whether cash distributions are made to the partner by the partnership. Distributions by a partnership to a partner are generally not taxable to the partnership or the partner unless the amount of cash distributed to the partner is in excess of the partner’s adjusted basis in the partner’s partnership interest. Please read “—Tax Consequences of Unit Ownership—Treatment of Distributions” and “—Disposition of Units”).

Section 7704 of the Internal Revenue Code provides that publicly traded partnerships will, as a general rule, be taxed as corporations. However, an exception, referred to as the “Qualifying Income Exception,” exists with respect to publicly traded partnerships of which 90% or more of the gross income for every taxable year consists of “qualifying income.” Qualifying income includes income and gains derived from exploration and production of certain natural resources, including oil, natural gas, and products thereof. Other types of qualifying income include interest (other than from a financial business), dividends, gains from the sale of real property and gains from the sale or other disposition of capital assets held for the production of income that otherwise constitutes qualifying income. We estimate that less than 5% of our current gross income is not qualifying income; however, this estimate could change from time to time. Based upon and subject to this estimate, the factual representations made by us and our general partner, and a review of the applicable legal authorities, Sidley Austin LLP is of the opinion that at least 90% of our current gross income constitutes qualifying income. The portion of our income that is qualifying income may change from time to time.

No ruling has been or will be sought from the IRS, and the IRS has made no determination as to our status as a partnership or the status of our operating subsidiary as a disregarded entity for U.S. federal income tax purposes or whether our operations generate “qualifying income” under Section 7704 of the Internal Revenue Code. Instead, we will rely on the opinion of Sidley Austin LLP on such matters. It is the opinion of Sidley Austin LLP that, based upon the Internal Revenue Code, existing Treasury Regulations, published revenue rulings and court decisions and the representations described below, we will be classified as a partnership and our operating subsidiary will be disregarded as an entity separate from us for U.S. federal income tax purposes.

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In rendering its opinion, Sidley Austin LLP has relied on factual representations made by us and our general partner, including, without limitation:

(a) neither we nor our operating subsidiary has elected or will elect to be treated as a corporation; and

(b) for each taxable year, including short taxable years occurring as a result of a constructive termination, more than 90% of our gross income has been and will be income of the type that Sidley Austin LLP has opined or will opine is “qualifying income” within the meaning of Section 7704(d) of the Internal Revenue Code.

We believe that these representations are true and expect that these representations will continue to be true in the future.

If we fail to meet the Qualifying Income Exception, unless such failure is determined by the IRS to be inadvertent and is cured within a reasonable time after discovery (in which case the IRS may also require us to make adjustments with respect to our unitholders or pay other amounts), we will be treated as if we had transferred all of our assets, subject to liabilities, to a newly formed corporation, on the first day of the year in which we failed to meet the Qualifying Income Exception, in return for stock in that corporation and then distributed that stock to our unitholders in liquidation of their interests in us. This deemed contribution and liquidation should be tax-free to our unitholders and us so long as we, at that time, do not have liabilities in excess of the tax basis of our assets. Thereafter, we would be treated as an association taxable as a corporation for U.S. federal income tax purposes.

If we were treated as an association taxable as a corporation for U.S. federal income tax purposes in any taxable year, either as a result of a failure to meet the Qualifying Income Exception or otherwise, our items of income, gain, loss and deduction would be reflected only on our tax return rather than being passed through to our unitholders, and our net income would be taxed to us at corporate rates. In addition, any distribution made to a unitholder would be treated as taxable dividend income, to the extent of our current and accumulated earnings and profits, or, in the absence of earnings and profits, a nontaxable return of capital, to the extent of the unitholder’s tax basis in our common units, or taxable capital gain, after the unitholder’s tax basis in his common units is reduced to zero. Accordingly, taxation as a corporation would result in a material reduction in a unitholder’s cash flow and after-tax return and thus would likely result in a substantial reduction of the value of our common units.

The remainder of this discussion is based on Sidley Austin LLP’s opinion that we will be classified as a partnership for U.S. federal income tax purposes.

Tax Consequences of Unit Ownership

Limited Partner Status

Unitholders of Mid-Con Energy Partners, LP will be treated as partners of Mid-Con Energy Partners, LP for U.S. federal income tax purposes. Also, unitholders whose common units are held in street name or by a nominee and who have the right to direct the nominee in the exercise of all substantive rights attendant to the ownership of their common units will be treated as partners of Mid-Con Energy Partners, LP for U.S. federal income tax purposes.

A beneficial owner of common units whose units have been transferred to a short seller to complete a short sale would appear to lose his status as a partner with respect to those units for U.S. federal income tax purposes. Please read “—Treatment of Securities Loans.”

Items of our income, gain, loss or deduction would not appear to be reportable by a unitholder who is not a partner for U.S. federal income tax purposes, and any cash distributions received by a unitholder who is not a partner for U.S. federal income tax purposes would therefore appear to be fully taxable as ordinary income.

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These holders are urged to consult their own tax advisors with respect to the tax consequences applicable to them of holding common units in Mid-Con Energy Partners, LP. The references to “unitholders” in the discussion that follows are to persons who are treated as partners in Mid-Con Energy Partners, LP for U.S. federal income tax purposes.

Flow-Through of Taxable Income

Subject to the discussion below under “—Entity-Level Collections of Unitholder Taxes,” neither we nor our subsidiary will pay any U.S. federal income tax. For U.S. federal income tax purposes, each unitholder will be required to report on his income tax return his share of our income, gains, losses and deductions without regard to whether we make cash distributions to such unitholder. As of the date of this prospectus, cash distributions to the holders of our common units continue to be indefinitely suspended. Consequently, we will allocate income to a unitholder even if that unitholder has not received a cash distribution. Each unitholder will be required to include in income his allocable share of our income, gains, losses and deductions for our taxable year or years ending with or within his taxable year. Our taxable year ends on December 31.

Treatment of Distributions

Distributions made by us to a unitholder generally will not be taxable to the unitholder for federal income tax purposes, except to the extent the amount of any such cash distribution exceeds his tax basis in his common units immediately before the distribution. Cash distributions made by us to a unitholder in an amount in excess of the unitholder’s tax basis in his common units generally will be considered to be gain from the sale or exchange of those common units, taxable in accordance with the rules described under “—Disposition of Units” below. Any reduction in a unitholder’s share of our liabilities, including as a result of future issuances of additional common units, will be treated as a distribution of cash to that unitholder. To the extent that cash distributions made by us cause a unitholder’s “at risk” amount to be less than zero at the end of any taxable year, that unitholder must recapture any losses deducted in previous years. Please read “—Limitations on Deductibility of Losses.”

A decrease in a unitholder’s percentage interest in us because of our issuance of additional common units will decrease his share of our nonrecourse liabilities, and thus will result in a corresponding deemed distribution of cash. This deemed distribution may constitute a non-pro rata distribution. A non-pro rata distribution of money or property, including a deemed distribution, may result in ordinary income to a unitholder, regardless of that unitholder’s tax basis in its common units, if the distribution reduces the unitholder’s share of our “unrealized receivables,” including depreciation recapture, depletion recapture and/or substantially appreciated “inventory items,” each as defined in Section 751 of the Internal Revenue Code, and collectively, “Section 751 Assets.” To the extent of such reduction, a unitholder will be treated as having been distributed his proportionate share of the Section 751 Assets and then having exchanged those assets with us in return for an allocable portion of the non-pro rata distribution made to such unitholder. This latter deemed exchange generally will result in the unitholder’s realization of ordinary income, which will equal the excess of the non-pro rata portion of that distribution over the unitholder’s tax basis (generally zero) in the Section 751 Assets deemed relinquished in the exchange.

Basis of Units

A unitholder’s initial tax basis for his common units will be the amount he paid for those common units plus his share of our nonrecourse liabilities. That basis will be increased by the unitholder’s share of our income and by any increases in such unitholder’s share of our nonrecourse liabilities and, on the disposition of a common unit, by his share of certain items related to business interest not yet deductible by him due to applicable limitations. Please read “”—Limitations on Interest Deductions.” That basis will be decreased, but not below zero, by distributions from us, by the unitholder’s share of our losses, by depletion deductions taken by him to

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the extent such deductions do not exceed his proportionate share of the adjusted tax basis of the underlying properties, by any decreases in his share of our nonrecourse liabilities, by his share of our excess business interest (generally, the excess of our business interest over the amount that is deductible) and by his share of our expenditures that are not deductible in computing taxable income and are not required to be capitalized. A unitholder will have no share of our debt that is recourse to our general partner, but will have a share, generally, based on his share of our profits, of our nonrecourse liabilities. Please read “—Disposition of Units—Recognition of Gain or Loss.”

Limitations on Deductibility of Losses

The deduction by a unitholder of that unitholder’s share of our losses will be limited to the tax basis the unitholder has in the unitholder’s common units and, in the case of an individual unitholder, estate, trust or corporate unitholder (if more than 50% of the value of the corporate unitholder’s stock is owned directly or indirectly by or for five or fewer individuals or some tax-exempt organizations), to the amount for which the unitholder is considered to be “at risk” with respect to our activities, if that amount is less than the unitholder’s tax basis. A unitholder subject to these limitations must recapture losses deducted in previous years to the extent that distributions cause the unitholder’s at risk amount to be less than zero at the end of any taxable year. Losses disallowed to a unitholder or recaptured as a result of these limitations will carry forward and will be allowable as a deduction in a later year to the extent that the unitholder’s tax basis or at risk amount, whichever is the limiting factor, is subsequently increased. Upon the taxable disposition of a unit, any gain recognized by a unitholder can be offset by losses that were previously suspended by the at risk limitation but may not be offset by losses suspended by the basis limitation. Any loss previously suspended by the at risk limitation in excess of that gain would no longer be utilizable.

In general, a unitholder will be at risk to the extent of the tax basis of the unitholder’s common units, excluding any portion of that basis attributable to the unitholder’s share of our nonrecourse liabilities, reduced by (1) any portion of that basis representing amounts otherwise protected against loss because of a guarantee, stop loss agreement or other similar arrangement and (2) any amount of money the unitholder borrows to acquire or hold his common units, if the lender of those borrowed funds owns an interest in us, is related to another unitholder or can look only to the common units for repayment. A unitholder’s at risk amount will increase or decrease as the tax basis of the unitholder’s common units increases or decreases, other than tax basis increases or decreases attributable to increases or decreases in the unitholder’s share of our liabilities.

The at risk limitation applies on an activity-by-activity basis, and in the case of oil and natural gas properties, each property is treated as a separate activity. Thus, a taxpayer’s interest in each oil or natural gas property is generally required to be treated separately so that a loss from any one property would be limited to the at risk amount for that property and not the at risk amount for all the taxpayer’s oil and natural gas properties. It is uncertain how this rule is implemented in the case of multiple oil and natural gas properties owned by a single entity treated as a partnership for federal income tax purposes. However, for taxable years ending on or before the date on which further guidance is published, the IRS will permit aggregation of oil or natural gas properties we own in computing a unitholder’s at risk limitation with respect to us. If a unitholder were required to compute his at risk amount separately with respect to each oil or natural gas property we own, he might not be allowed to utilize his share of losses or deductions attributable to a particular property even though he has a positive at risk amount with respect to his common units as a whole.

In addition to the basis and at risk limitations on the deductibility of losses, the passive loss limitations generally provide that individuals, estates, trusts and some closely-held corporations and personal service corporations may deduct losses from passive activities, which are generally defined as trade or business activities in which the taxpayer does not materially participate, only to the extent of the taxpayer’s income from those passive activities. The passive loss limitations are applied separately with respect to each publicly-traded partnership. Consequently, any passive losses we generate will only be available to offset our passive income generated in the future and will not be available to offset income from other passive activities or investments,

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including our investments or a unitholder’s investments in other publicly-traded partnerships, or a unitholder’s salary or active business income. Passive losses that are not deductible because they exceed a unitholder’s share of income we generate may be deducted in full when he disposes of his entire investment in us in a fully taxable transaction with an unrelated party. The passive loss limitations are applied after other applicable limitations on deductions, including the at risk rules and the basis limitation.

A unitholder’s share of our net income may be offset by any of our suspended passive losses, but it may not be offset by any other current or carryover losses from other passive activities, including those attributable to other publicly traded partnerships.

An additional loss limitation may apply to certain of our unitholders for taxable years beginning after December 31, 2017, and before January 1, 2026. A non-corporate unitholder will not be allowed to take a deduction for certain excess business losses in such taxable years. An excess business loss is the excess (if any) of a taxpayer’s aggregate deductions for the taxable year that are attributable to the trades or businesses of such taxpayer (determined without regard to the excess business loss limitation) over the aggregate gross income or gain of such taxpayer for the taxable year that is attributable to such trades or businesses plus a threshold amount. The threshold amount is equal to $250,000, or $500,000 for taxpayers filing a joint return. Any losses disallowed in a taxable year due to the excess business loss limitation may be used by the applicable unitholder in the following taxable year if certain conditions are met. Unitholders to which this excess business loss limitation applies will take their allocable share of our items of income, gain, loss and deduction into account in determining this limitation. This excess business loss limitation will be applied to a non-corporate unitholder after the passive loss limitations and may limit such unitholders’ ability to utilize any losses we generate allocable to such unitholder that are not otherwise limited by the basis, at-risk and passive loss limitations described above.

Limitations on Interest Deductions

Our ability to deduct interest paid or accrued on indebtedness properly allocable to a trade or business, “business interest,” may be limited in certain circumstances. Should our ability to deduct business interest be limited, the amount of taxable income allocated to our unitholders in the taxable year in which the limitation is in effect may increase. However, in certain circumstances, a unitholder may be able to utilize a portion of a business interest deduction subject to this limitation in future taxable years. Prospective unitholders should consult their tax advisors regarding the impact of this business interest deduction limitation on an investment in our common units.

In addition, the deductibility of a non-corporate taxpayer’s “investment interest expense” is generally limited to the amount of that taxpayer’s “net investment income.” Investment interest expense includes:

The computation of a unitholder’s investment interest expense will take into account interest on any margin account borrowing or other loan incurred to purchase or carry a unit. Net investment income includes gross income from property held for investment and amounts treated as portfolio income under the passive loss rules, less deductible expenses, other than interest, directly connected with the production of investment income, but generally does not include gains attributable to the disposition of property held for investment or qualified dividend income (if applicable). A unitholder’s share of a publicly traded partnership’s portfolio income and, according to the IRS, net passive income will be treated as investment income for purposes of the investment interest expense limitation.

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Entity-Level Collections of Unitholder Taxes

If we are required or elect under applicable law to pay any U.S. federal, state, local or non-U.S. tax on behalf of any unitholder or our general partner or any former unitholder, we are authorized to pay those taxes from our funds. That payment, if made, will be treated as a distribution of cash to the unitholder on whose behalf the payment was made. If the payment is made on behalf of a unitholder whose identity cannot be determined, we are authorized to treat the payment as a distribution to all current unitholders. We are authorized to amend our partnership agreement in the manner necessary to maintain uniformity of intrinsic tax characteristics of common units and to adjust later distributions, so that after giving effect to these distributions, the priority and characterization of distributions otherwise applicable under our partnership agreement is maintained as nearly as is practicable. Payments by us as described above could give rise to an overpayment of tax on behalf of an individual unitholder in which event the unitholder may be entitled to claim a refund of the overpayment amount. Please read “—Administrative Matters—Information Returns and Audit Procedures”. Unitholders are urged to consult their tax advisors to determine the consequences to them of ay tax payment we make on their behalf.

Allocation of Income, Gain, Loss and Deduction

In general, our items of income, gain, loss and deduction will be allocated among our general partner and the unitholders in accordance with their percentage interests in us. If we have a net loss for an entire taxable year, the loss will be allocated first to our general partner and the unitholders in accordance with their percentage interests in us to the extent of the unitholders’ positive capital accounts as adjusted to take into account the unitholders’ share of nonrecourse debt, and thereafter to our general partner.

Specified items of our income, gain, loss and deduction will be allocated to account for the difference between the tax basis and fair market value of our assets, a “Book Tax Disparity,” at the time such assets are contributed to us and at the time of any subsequent offering of our common units. As a result, the federal income tax burden associated with any Book-Tax Disparity immediately prior to an offering generally will be borne by the partners holding interests in us prior to such offering. In addition, items of recapture income will be allocated to the extent possible to the unitholder who was allocated the deduction giving rise to the treatment of that gain as recapture income in order to minimize the recognition of ordinary income by other unitholders.

An allocation of items of our income, gain, loss or deduction, other than an allocation required by the Internal Revenue Code to eliminate a Book-Tax Disparity, will generally be given effect for U.S. federal income tax purposes in determining a unitholder’s share of an item of income, gain, loss or deduction only if the allocation has substantial economic effect. In any other case, a unitholder’s share of an item will be determined on the basis of his interest in us, which will be determined by taking into account all the facts and circumstances, including:

Sidley Austin LLP is of the opinion that, with the exception of the issues described in “—Section 754 Election” and “—Disposition of Units—Allocations Between Transferors and Transferees,” allocations under our partnership agreement will be given effect for federal income tax purposes in determining a partner’s share of an item of income, gain, loss or deduction.

Treatment of Securities Loans

A unitholder whose common units are the subject of a securities loan (for example, a loan to a “short seller” to cover a short sale of common units) may be treated as having disposed of those common units. If so, such

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unitholder would no longer be treated for tax purposes as a partner with respect to those common units during the period of the loan and may recognize gain or loss from the disposition. As a result, during this period:

Due to lack of controlling authority, Sidley Austin LLP has not rendered an opinion regarding the tax treatment of a unitholder that enters into a securities loan with respect to his common units. Unitholders desiring to assure their status as partners and avoid the risk of gain recognition from a loan of their common units are urged to consult with their tax advisor about modifying any applicable brokerage account agreements to prohibit their brokers from borrowing and lending their common units. The IRS has previously announced that it is studying issues relating to the tax treatment of short sales of partnership interests. Please also read “—Disposition of Units—Recognition of Gain or Loss.”

Tax Rates

Under current law, the highest marginal U.S. federal income tax rate applicable to ordinary income of individuals is 37% and the highest marginal U.S. federal income tax rate applicable to long-term capital gains (generally, gains from the sale or exchange of certain investment assets held for more than one year) of individuals is 20%. These rates are subject to change by new legislation at any time.

In addition, a 3.8% net investment income tax, or NIIT, is imposed on certain net investment income earned by individuals, estates, and trusts. For these purposes, investment income generally includes a unitholder’s allocable share of our income and gain realized by a unitholder from a sale of common units. In the case of an individual, the tax will be imposed on the lesser of (i) the unitholder’s net investment income from all investments, and (ii) the amount by which the unitholder’s modified adjusted gross income exceeds specified threshold levels depending on a unitholder’s federal income tax filing status. In the case of an estate or trust, the tax will be imposed on the lesser of (i) undistributed net investment income, and (ii) the excess adjusted gross income over the dollar amount at which the highest income tax bracket applicable to an estate or trust begins. Unitholders are urged to consult with their tax advisors as to the impact of the NIIT on an investment in our common units.

For taxable years beginning after December 31, 2017, and before January 1, 2026, a non-corporate unitholder is entitled to a deduction equal to 20% of his “qualified business income” attributable to us, subject to certain limitations. For purposes of this deduction, a unitholder’s “qualified business income” attributable to us is equal to the sum of:

Prospective unitholders should consult their tax advisors regarding the application of this deduction and its interaction with the overall deduction for qualified business income.

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Section 754 Election

We have made the election permitted by Section 754 of the Internal Revenue Code. That election is irrevocable without the consent of the IRS. That election generally permits us to adjust a unit purchaser’s tax basis in our assets (“inside basis”) under Section 743(b) of the Internal Revenue Code to reflect the unitholder’s purchase price. The Section 743(b) adjustment separately applies to any transferee of a unitholder who purchases outstanding common units from another unitholder based upon the values and bases of our assets at the time of the transfer to the transferee. The Section 743(b) adjustment does not apply to a person who purchases common units directly from us, and belongs only to the purchaser and not to other unitholders. Please read, however, “—Allocation of Income, Gain, Loss and Deduction.” For purposes of this discussion, a unitholder’s inside basis in our assets will be considered to have two components: (i) the unitholder’s share of our tax basis in our assets (“common basis”) and (ii) the unitholder’s Section 743(b) adjustment to that basis.

The timing and calculation of deductions attributable to Section 743(b) adjustments to our common basis will depend upon a number of factors, including the nature of the assets to which the adjustment is allocable, the extent to which the adjustment offsets any Internal Revenue Code Section 704(c) type gain or loss with respect to an asset and certain elections we make as to the manner in which we apply Internal Revenue Code Section 704(c) principles with respect to an asset to which the adjustment is applicable. Please read “—Allocation of Income, Gain, Loss and Deduction.”

The timing of these deductions may affect the uniformity of our common units. Under our partnership agreement, our general partner is authorized to take a position to preserve the uniformity of common units even if that position is not consistent with these and any other Treasury Regulations or if the position would result in lower annual depreciation or amortization deductions than would otherwise be allowable to some unitholders. Please read “—Uniformity of Units.” Sidley Austin LLP is unable to opine as to the validity of any such alternate tax positions because there is no clear applicable authority. A unitholder’s basis in a unit is reduced by his share of our deductions (whether or not such deductions were claimed on an individual income tax return) so that any position that we take that understates deductions will overstate the unitholder’s basis in his common units and may cause the unitholder to understate gain or overstate loss on any sale of such common units. Please read “—Uniformity of Units.”

A Section 754 election is advantageous if the transferee’s tax basis in his common units is higher than the common units’ share of the aggregate tax basis of our assets immediately prior to the transfer. In that case, as a result of the election, the transferee would have, among other items, a greater amount of depreciation and depletion deductions and the transferee’s share of any gain or loss on a sale of assets by us would be less. Conversely, a Section 754 election is disadvantageous if the transferee’s tax basis in his common units is lower than those common units’ share of the aggregate tax basis of our assets immediately prior to the transfer. Thus, the fair market value of the common units may be affected either favorably or unfavorably by the election. A basis adjustment is required regardless of whether a Section 754 election is made in the case of a transfer of an interest in us if we have a substantial built-in loss immediately after the transfer, or if we distribute property and have a substantial basis reduction. Generally a built-in loss or a basis reduction is substantial if it exceeds $250,000.

The calculations involved in the Section 754 election are complex and will be made on the basis of assumptions as to the fair market value of our assets and other matters. For example, the allocation of the Section 743(b) adjustment among our assets must be made in accordance with the Internal Revenue Code. The IRS could seek to reallocate some or all of any Section 743(b) adjustment we allocated to our tangible assets to goodwill instead. Goodwill, as an intangible asset, is generally either non-amortizable or amortizable over a longer period of time or under a less accelerated method than our tangible assets. We cannot assure our unitholders that the determinations we make will not be successfully challenged by the IRS or that the resulting deductions will not be reduced or disallowed altogether. Should the IRS require a different basis adjustment to be made, and should our general partner determine the expense of compliance exceeds the benefit of the election,

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we may seek permission from the IRS to revoke our Section 754 election. If permission is granted, a subsequent purchaser of common units may be allocated more income than such purchaser would have been allocated had the election not been revoked.

Tax Treatment of Operations

Accounting Method and Taxable Year

We use the year ending December 31 as our taxable year and the accrual method of accounting for federal income tax purposes. Each unitholder will be required to include in income his share of our income, gain, loss and deduction for our taxable year ending within or with his taxable year. In addition, a unitholder who has a taxable year ending on a date other than December 31 and who disposes of all of his common units following the close of our taxable year but before the close of his taxable year must include his share of our income, gain, loss and deduction in income for his taxable year, with the result that he will be required to include in income for his taxable year his share of more than twelve months of our income, gain, loss and deduction. Please read “—Disposition of Units—Allocations Between Transferors and Transferees.”

Depletion Deductions

Subject to the limitations on deductibility of losses discussed above (please read “—Tax Consequences of Unit Ownership—Limitations on Deductibility of Losses”), unitholders will be entitled to deductions for the greater of either cost depletion or (if otherwise allowable) percentage depletion with respect to our oil and natural gas interests. Although the Internal Revenue Code requires each unitholder to compute his own depletion allowance and maintain records of his share of the adjusted tax basis of the underlying property for depletion and other purposes, we intend to furnish each of our unitholders with information relating to this computation for federal income tax purposes. Each unitholder, however, remains responsible for calculating his own depletion allowance and maintaining records of his share of the adjusted tax basis of the underlying property for depletion and other purposes.

Percentage depletion is generally available with respect to unitholders who qualify under the independent producer exemption contained in Section 613A(c) of the Internal Revenue Code. For this purpose, an independent producer includes any person that is not directly or indirectly involved in the retail sale of oil, natural gas, or derivative products or the operation of a major refinery. Percentage depletion is calculated as an amount generally equal to 15% (and, in the case of marginal production, potentially a higher percentage) of the unitholder’s gross income from the depletable property for the taxable year. The percentage depletion deduction with respect to any property is limited to 100% of the taxable income of the unitholder from the property for each taxable year, computed without the depletion allowance. A unitholder that qualifies as an independent producer may deduct percentage depletion only to the extent the unitholder’s average net daily production of domestic oil, or the natural gas equivalent, does not exceed 1,000 barrels. This depletable amount may be allocated between oil and natural gas production, with 6,000 cubic feet of domestic natural gas production regarded as equivalent to one barrel of crude oil. The 1,000-barrel limitation must be allocated among the independent producer and controlled or related persons and family members in proportion to the respective production by such persons during the period in question.

In addition to the foregoing limitations, the percentage depletion deduction otherwise available is limited to 65% of a unitholder’s total taxable income from all sources for the year, computed without the depletion allowance, net operating loss carrybacks, or capital loss carrybacks. Any percentage depletion deduction disallowed because of the 65% limitation may be deducted in the following taxable year if the percentage depletion deduction for such year plus the deduction carryover does not exceed 65% of the unitholder’s total taxable income for that year. The carryover period resulting from the 65% net income limitation is unlimited.

Unitholders that do not qualify under the independent producer exemption are generally restricted to depletion deductions based on cost depletion. Cost depletion deductions are calculated by (i) dividing the

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unitholder’s share of the adjusted tax basis in the underlying mineral property by the number of mineral units (barrels of oil and thousand cubic feet, or Mcf, of natural gas) remaining as of the beginning of the taxable year and (ii) multiplying the result by the number of mineral units sold within the taxable year. The total amount of deductions based on cost depletion cannot exceed the unitholder’s share of the total adjusted tax basis in the property.

All or a portion of any gain recognized by a unitholder as a result of either the disposition by us of some or all of our oil and natural gas interests or the disposition by the unitholder of some or all of his common units may be taxed as ordinary income to the extent of recapture of depletion deductions, except for percentage depletion deductions in excess of the tax basis of the property. The amount of the recapture is generally limited to the amount of gain recognized on the disposition.

The foregoing discussion of depletion deductions does not purport to be a complete analysis of the complex legislation and Treasury Regulations relating to the availability and calculation of depletion deductions by the unitholders. Further, because depletion is required to be computed separately by each unitholder and not by our partnership, no assurance can be given, and counsel is unable to express any opinion, with respect to the availability or extent of percentage depletion deductions to the unitholders for any taxable year. We encourage each prospective unitholder to consult his tax advisor to determine whether percentage depletion would be available to him.

Deductions for Intangible Drilling and Development Costs

We have elected to currently deduct intangible drilling and development costs, or IDCs. IDCs generally include our expenses for wages, fuel, repairs, hauling, supplies and other items that are incidental to, and necessary for, the drilling and preparation of wells for the production of oil, natural gas, or geothermal energy. The option to currently deduct IDCs applies only to those items that do not have a salvage value.

Although we have elected to currently deduct IDCs, each unitholder will have the option of either currently deducting IDCs or capitalizing all or part of the IDCs and amortizing them on a straight-line basis over a 60-month period, beginning with the taxable month in which the expenditure is made. If a unitholder makes the election to amortize the IDCs over a 60-month period, no IDC preference amount in respect of those IDCs will result for alternative minimum tax purposes.

Integrated oil companies must capitalize 30% of all their IDCs (other than IDCs paid or incurred with respect to oil and natural gas wells located outside of the United States) and amortize these IDCs over 60 months beginning in the month in which those costs are paid or incurred. If the taxpayer ceases to be an integrated oil company, it must continue to amortize those costs as long as it continues to own the property to which the IDCs relate. An “integrated oil company” is a taxpayer that has economic interests in oil or natural gas properties and also carries on substantial retailing or refining operations. An oil or natural gas producer is deemed to be a substantial retailer or refiner if it is does not qualify as an independent producer under the rules disqualifying retailers and refiners from taking percentage depletion. Please read “—Depletion Deductions.”

IDCs previously deducted that are allocable to property (directly or through ownership of an interest in a partnership) and that would have been included in the adjusted tax basis of the property had the IDC deduction not been taken are recaptured to the extent of any gain realized upon the disposition of the property or upon the disposition by a unitholder of interests in us. Recapture is generally determined at the unitholder level. Where only a portion of the recapture property is sold, any IDCs related to the entire property are recaptured to the extent of the gain realized on the portion of the property sold. In the case of a disposition of an undivided interest in a property, a proportionate amount of the IDCs with respect to the property is treated as allocable to the transferred undivided interest to the extent of any gain recognized. Please read “—Disposition of Units—Recognition of Gain or Loss.”

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Lease Acquisition Costs

The cost of acquiring oil and natural gas lease or similar property interests is a capital expenditure that must be recovered through depletion deductions if the lease is productive. If a lease is proved worthless and abandoned, the cost of acquisition less any depletion claimed may be deducted as an ordinary loss in the year the lease becomes worthless. Please read “—Tax Treatment of Operations—Depletion Deductions.”

Geophysical Costs

The cost of geophysical exploration incurred in connection with the exploration and development of oil and natural gas properties in the United States are deducted ratably over a 24-month period beginning on the date that such expense is paid or incurred.

Operating and Administrative Costs

Amounts paid for operating a producing well are deductible as ordinary business expenses, as are administrative costs, to the extent they constitute ordinary and necessary business expenses that are reasonable in amount.

Tax Basis, Depreciation and Amortization

The tax basis of our assets will be used for purposes of computing depreciation and cost recovery deductions and, ultimately, gain or loss on the disposition of these assets. The federal income tax burden associated with the difference between the fair market value of our assets and their tax basis immediately prior to an offering will be borne by our partners holding interests in us prior to such offering. Please read “—Tax Consequences of Unit Ownership—Allocation of Income, Gain, Loss and Deduction.”

To the extent allowable, we may elect to use the depreciation and cost recovery methods, including bonus depreciation to the extent applicable, that will result in the largest deductions being taken in the early years after assets subject to these allowances are placed in service. We may not be entitled to any amortization deductions with respect to certain goodwill properties conveyed to us or held by us at the time of any future offering. Please read “—Uniformity of Units.” Property we subsequently acquire or construct may be depreciated using accelerated methods permitted by the Internal Revenue Code.

If we dispose of depreciable or depletable property by sale, foreclosure or otherwise, all or a portion of any gain, determined by reference to the amount of depreciation and depletion deductions previously taken, may be subject to the recapture rules and taxed as ordinary income rather than capital gain. Similarly, a unitholder who has taken cost recovery or depreciation deductions with respect to property we own will likely be required to recapture some or all of those deductions as ordinary income upon a sale of his interest in us. Please read “—Tax Consequences of Unit Ownership—Allocation of Income, Gain, Loss and Deduction” and “—Disposition of Units—Recognition of Gain or Loss.”

The costs we incur in offering and selling our common units (called “syndication expenses”) must be capitalized and cannot be deducted currently, ratably or upon our termination. While there are uncertainties regarding the classification of costs as organization expenses, which may be amortized by us, and as syndication expenses, which may not be amortized by us, the underwriting discount we incur will be treated as syndication expenses.

Valuation and Tax Basis of Our Properties

The federal income tax consequences of the ownership and disposition of common units will depend in part on our estimates of the relative fair market values and the tax bases of our assets. Although we may from time to time consult with professional appraisers regarding valuation matters, we will make many of the relative fair

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market value estimates ourselves. These estimates and determinations of basis are subject to challenge and will not be binding on the IRS or the courts. If the estimates of fair market value or basis are later found to be incorrect, the character and amount of items of income, gain, loss or deduction previously reported by unitholders might change, and unitholders might be required to adjust their tax liability for prior years and incur interest and penalties with respect to those adjustments.

Disposition of Units

Recognition of Gain or Loss

A unitholder will be required to recognize gain or loss on a sale of common units equal to the difference between the unitholder’s amount realized and the unitholder’s tax basis for the common units sold. A unitholder’s amount realized will equal the sum of the cash or the fair market value of other property he receives plus his share of our liabilities. Because the amount realized includes a unitholder’s share of our liabilities, the gain recognized on the sale of common units could result in a tax liability in excess of any cash received from the sale.

Prior distributions from us that in the aggregate were in excess of the cumulative net taxable income allocated for a unit that decreased a unitholder’s tax basis in that unit will, in effect, become taxable income if the unit is sold at a price greater than the unitholder’s tax basis in the unit, even if the price received is less than his original cost.

Except as noted below, gain or loss recognized by a unitholder, other than a “dealer” in units, on the sale or exchange of a unit held for more than one year will generally be taxable as long-term capital gain or loss. However, a portion of this gain or loss, which will likely be substantial, will be separately computed and taxed as ordinary income or loss under Section 751 of the Internal Revenue Code to the extent attributable to assets giving rise to depreciation recapture or other “unrealized receivables” or “inventory items” that we own. The term “unrealized receivables” includes potential recapture items, including depreciation, depletion, amortization or IDC recapture. Ordinary income attributable to unrealized receivables, inventory items and depreciation recapture may exceed net taxable gain realized on the sale of a unit and may be recognized even if there is a net taxable loss realized on the sale of a unit. Thus, a unitholder may recognize both ordinary income and a capital loss upon a sale of common units. Capital losses may offset capital gains and no more than $3,000 of ordinary income each year, in the case of individuals, and may only be used to offset capital gain in the case of corporations. Ordinary income recognized by a unitholder on disposition of our common units may be reduced by such unitholder’s deduction for qualified business income. Both ordinary income (prior to any reduction for qualified business income) and capital gain recognized on a sale of common units may be subject to the NIIT in certain circumstances. Please read “—Tax Consequences of Unit Ownership—Tax Rates.”

For the purposes of calculating gain or loss on the sale of common units, the unitholder’s adjusted tax basis will be adjusted by his allocable share of our income or loss in respect of his units for the year of the sale. Furthermore, the IRS has ruled that a partner who acquires interests in a partnership in separate transactions must combine those interests and maintain a single adjusted tax basis for all those interests. Upon a sale or other disposition of less than all of those interests, a portion of that tax basis must be allocated to the interests sold using an “equitable apportionment” method, which generally means that the tax basis allocated to the interest sold equals an amount that bears the same relation to the partner’s tax basis in his entire interest in the partnership as the value of the interest sold bears to the value of the partner’s entire interest in the partnership. Treasury Regulations under Section 1223 of the Internal Revenue Code allow a selling unitholder who can identify common units transferred with an ascertainable holding period to elect to use the actual holding period of the common units transferred. Thus, according to the ruling discussed above, a unitholder will be unable to select high or low basis common units to sell as would be the case with corporate stock, but, according to the Treasury Regulations, he may designate specific common units sold for purposes of determining the holding period of common units transferred. A unitholder electing to use the actual holding period of common units

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transferred must consistently use that identification method for all subsequent sales or exchanges of our common units. A unitholder considering the purchase of additional common units or a sale of common units purchased in separate transactions is urged to consult his tax advisor as to the possible consequences of this ruling and application of the Treasury Regulations.

Specific provisions of the Internal Revenue Code affect the taxation of some financial products and securities, including partnership interests, by treating a taxpayer as having sold an “appreciated” partnership interest, one in which gain would be recognized if it were sold, assigned or terminated at its fair market value, if the taxpayer or related persons enter(s) into:

in each case, with respect to the partnership interest or substantially identical property.

Moreover, if a taxpayer has previously entered into a short sale, an offsetting notional principal contract or a futures or forward contract with respect to the partnership interest, the taxpayer will be treated as having sold that position if the taxpayer or a related person then acquires the partnership interest or substantially identical property. The Secretary of the Treasury is also authorized to issue regulations that treat a taxpayer that enters into transactions or positions that have substantially the same effect as the preceding transactions as having constructively sold the financial position.

Allocations Between Transferors and Transferees

In general, our taxable income or loss will be determined annually, will be prorated on a monthly basis and will be subsequently apportioned among the unitholders in proportion to the number of common units owned by each of them as of the opening of the applicable exchange on the first business day of the month (the “Allocation Date”). However, gain or loss realized on a sale or other disposition of our assets other than in the ordinary course of business will be allocated among the unitholders on the Allocation Date in the month in which that gain or loss is recognized. As a result, a unitholder transferring common units may be allocated income, gain, loss and deduction realized after the date of transfer.

The U.S. Department of Treasury and the IRS have issued Treasury Regulations that permit publicly traded partnerships to use a monthly simplifying convention that is similar to ours, but these regulations do not specifically authorize all aspects of the proration method we have adopted. Accordingly, Sidley Austin LLP is unable to opine on the validity of our method of allocating income, gain, loss and deductions among transferor and transferee unitholders. If the IRS were to successfully challenge our proration method, we may be required to change the allocation of items of income, gain, loss and deduction among our unitholders. We are authorized to revise our method of allocation between transferor and transferee unitholders, as well as unitholders whose interests vary during a taxable year.

A unitholder who owns common units at any time during a quarter and who disposes of them prior to the record date set for a cash distribution for that quarter will be allocated items of our income, gain, loss and deductions attributable to that quarter through the month of disposition but will not be entitled to receive that cash distribution.

Notification Requirements

A unitholder who sells any of his common units is generally required to notify us in writing of that sale within 30 days after the sale (or, if earlier, January 15 of the year following the sale). A purchaser of common

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units who purchases common units from another unitholder is also generally required to notify us in writing of that purchase within 30 days after the purchase. Upon receiving such notifications, we are required to notify the IRS of that transaction and to furnish specified information to the transferor and transferee. Failure to notify us of a transfer of common units may, in some cases, lead to the imposition of penalties. However, these reporting requirements do not apply to a sale by an individual who is a citizen of the United States and who effects the sale or exchange through a broker who will satisfy such requirements.

Uniformity of Units

Because we cannot match transferors and transferees of common units and because of other reasons, we must maintain uniformity of the economic and tax characteristics of the common units to a purchaser of these common units. In the absence of uniformity, we may be unable to completely comply with a number of federal income tax requirements, both statutory and regulatory. A lack of uniformity could result from a literal application of Treasury Regulation Section 1.167(c)-1(a)(6), which is not expected to apply to a material portion of our assets. Any non-uniformity could have a negative impact on the value of the common units. Please read “—Tax Consequences of Unit Ownership—Section 754 Election.”

Our partnership agreement permits our general partner to take positions in filing our tax returns that preserve the uniformity of our common units even under circumstances like those described above. These positions may include reducing for some unitholders the depreciation, amortization or loss deductions to which they would otherwise be entitled or reporting a slower amortization of Section 743(b) adjustments for some unitholders than that to which they would otherwise be entitled. Sidley Austin LLP is unable to opine as to validity of such filing positions. A unitholder’s basis in common units is reduced by his share of our deductions (whether or not such deductions were claimed on an individual income tax return) so that any position that we take that understates deductions will overstate the unitholder’s basis in his common units, and may cause the unitholder to understate gain or overstate loss on any sale of such common units. Please read “—Disposition of Units—Recognition of Gain or Loss” and “—Tax Consequences of Unit Ownership—Section 754 Election.” The IRS may challenge one or more of any positions we take to preserve the uniformity of common units. If such a challenge were sustained, the uniformity of common units might be affected, and, under some circumstances, the gain from the sale of common units might be increased without the benefit of additional deductions.

Tax-Exempt Organizations and Other Investors

Ownership of common units by employee benefit plans, other tax-exempt organizations, non-resident aliens, non-U.S. corporations and other non-U.S. persons raises issues unique to those investors and, as described below, may have substantially adverse tax consequences to them. Prospective unitholders who are tax-exempt entities or non-U.S. persons should consult their tax advisor before investing in our common units.

Employee benefit plans and most other organizations exempt from U.S. federal income tax, including individual retirement accounts and other retirement plans, are subject to U.S. federal income tax on unrelated business taxable income. Virtually all of our income allocated to a unitholder that is a tax-exempt organization will be unrelated business taxable income and will be taxable to it.

Non-resident aliens and non-U.S. corporations, trusts or estates that own common units will be considered to be engaged in business in the United States because of the ownership of common units. As a consequence, they will be required to file U.S. federal tax returns to report their share of our income, gain, loss or deduction and pay federal income tax at regular rates on their share of our net income or gain. Moreover, under rules applicable to publicly traded partnerships, distributions to non-U.S. unitholders are subject to withholding at the highest applicable effective tax rate. Each non-U.S. unitholder must obtain a taxpayer identification number from the IRS and submit that number to our transfer agent on a Form W-8BEN, W-8BEN-E or applicable substitute form in order to obtain credit for these withholding taxes. A change in applicable law may require us to change these procedures.

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In addition, because a non-U.S. corporation that owns common units will be treated as engaged in a United States trade or business, that corporation may be subject to the United States branch profits tax at a rate of 30%, in addition to regular U.S. federal income tax, on its share of our income and gain, as adjusted for changes in the foreign corporation’s “U.S. net equity,” that is effectively connected with the conduct of a United States trade or business. That tax may be reduced or eliminated by an income tax treaty between the United States and the country in which the foreign corporate unitholder is a “qualified resident.” In addition, this type of unitholder is subject to special information reporting requirements under Section 6038C of the Internal Revenue Code.

A non-U.S. unitholder who sells or otherwise disposes of a unit will be subject to U.S. federal income tax on gain realized from the sale or disposition of that unit to the extent the gain is effectively connected with a U.S. trade or business of the non-U.S. unitholder. Gain realized by a foreign unitholder from the sale of its interest in a partnership that is engaged in a trade or business in the U.S. will be considered to be effectively connected with a U.S. trade or business to the extent that gain that would be recognized upon a sale by the partnership of all of its assets would be effectively connected with a U.S. trade or business. Thus, all of a non-U.S. unitholder’s gain from the sale or disposition of common units would be treated as effectively connected with a unitholder’s indirect U.S. trade or business constituted by his investment in us and would be subject to U.S. federal income tax. As a result of the effectively connected income rules described above, the exclusion from U.S. taxation under the Foreign Investment in Real Property Tax Act for certain unitholders upon the sale of partnership units regularly traded on an established securities market will not prevent a non-U.S. unitholder from being subject to U.S. federal income tax on gain from the sale or disposition of common units.

Upon the sale, exchange or other disposition of a common unit by a non-U.S. unitholder, the transferee is generally required to withhold 10% of the amount realized on such sale, exchange or other disposition if any portion of the gain on such sale, exchange or other disposition would be treated as effectively connected with a U.S. trade or business. If the transferee fails to satisfy this withholding requirement, we will be required to deduct and withhold such amount (plus interest) from future distributions to the transferee. Because the “amount realized” would include a unitholder’s share of our nonrecourse liabilities, 10% of the amount realized could exceed the total cash purchase price for such disposed units. Due to this fact, our inability to match transferors and transferees of units, and other uncertainty surrounding the application of these withholding rules, the U.S. Department of the Treasury and the IRS have currently suspended these rules for transfers of certain publicly traded partnership interests, including transfers of our common units, until regulations or other guidance has been issued. It is unclear when such regulations or other guidance will be issued. Additional withholding requirements may also affect certain non-U.S. unitholders. Please read “—Administrative Matters—Additional Withholding Requirements.”

Administrative Matters

Information Returns and Audit Procedures

We intend to furnish to each unitholder, within 90 days after the close of each taxable year, specific tax information, including a Schedule K-1, which describes his share of our income, gain, loss and deduction for our preceding taxable year. In preparing this information, which will not be reviewed by counsel, we will take various accounting and reporting positions, some of which have been mentioned earlier, to determine each unitholder’s share of income, gain, loss and deduction. We cannot assure our unitholders that those positions will yield a result that conforms to the requirements of the Internal Revenue Code, Treasury Regulations or administrative interpretations of the IRS. Neither we, nor Sidley Austin LLP can assure prospective unitholders that the IRS will not successfully contend in court that those positions are impermissible. Any challenge by the IRS could negatively affect the value of the common units.

The IRS may audit our federal income tax information returns. Adjustments resulting from an IRS audit may require each unitholder to adjust a prior year’s tax liability, and possibly may result in an audit of his return. Any audit of a unitholder’s return could result in adjustments not related to our returns as well as those related to our returns.

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Partnerships generally are treated as separate entities for purposes of U.S. federal income tax audits, judicial review of administrative adjustments by the IRS and tax settlement proceedings. The tax treatment of partnership items of income, gain, loss and deduction are determined in a partnership proceeding rather than in separate proceedings with the partners. For taxable years beginning on or before December 31, 2017, the Internal Revenue Code requires that one partner be designated as the “Tax Matters Partner” for these purposes. Our partnership agreement designates our general partner as our Tax Matters Partner.

The Tax Matters Partner can extend the statute of limitations for assessment of tax deficiencies against unitholders for items in our returns. The Tax Matters Partner may bind a unitholder with less than a 1% profits interest in us to a settlement with the IRS unless that unitholder elects, by filing a statement with the IRS, not to give that authority to the Tax Matters Partner. The Tax Matters Partner may seek judicial review, by which all the unitholders are bound, of a final partnership administrative adjustment and, if the Tax Matters Partner fails to seek judicial review, judicial review may be sought by any unitholder having at least a 1% interest in profits or by any group of unitholders having in the aggregate at least a 5% interest in profits. However, only one action for judicial review will go forward, and each unitholder with an interest in the outcome may participate in that action.

A unitholder must file a statement with the IRS identifying the treatment of any item on his federal income tax return that is not consistent with the treatment of the item on our return. Intentional or negligent disregard of this consistency requirement may subject a unitholder to substantial penalties.

Pursuant to the Bipartisan Budget Act of 2015, for taxable years beginning after December 31, 2017, if the IRS makes audit adjustments to our income tax returns, it may assess and collect any taxes (including any applicable penalties and interest) resulting from such audit adjustment directly from us. Similarly, for such taxable years, if the IRS makes audit adjustments to income tax returns filed by an entity in which we are a member or partner, it may assess and collect any taxes (including penalties and interest) resulting from such audit adjustment directly from such entity. Generally, we expect to elect to have our general partner and its unitholders take any such audit adjustment into account in accordance with their interests in us during the taxable year under audit, but there can be no assurance that such election will be made, or if made, will be effective in all circumstances. If, as a result of any such audit adjustment, we are required to make payments of taxes, penalties and interest, our cash available for distribution to our common unitholders might be substantially reduced. Additionally, pursuant to the Bipartisan Budget Act of 2015, the Internal Revenue Code will no longer require that we designate a Tax Matters Partner. Instead, for taxable years beginning after December 31, 2017, we will be required to designate a partner, or other person, with a substantial presence in the United States as the partnership representative (“Partnership Representative”). The Partnership Representative will have the sole authority to act on our behalf for purposes of, among other things, U.S. federal income tax audits and judicial review of administrative adjustments by the IRS. If we do not make such a designation, the IRS can select any person as the Partnership Representative. Our partnership agreement designates our general partner as our Partnership Representative. Further, any actions taken by us or by the Partnership Representative on our behalf with respect to, among other things, U.S. federal income tax audits and judicial review of administrative adjustments by the IRS, will be binding on us and all of our unitholders.

Nominee Reporting

Persons who hold an interest in us as a nominee for another person are required to furnish to us:

(1) the name, address and taxpayer identification number of the beneficial owner and the nominee;

(2) a statement regarding whether the beneficial owner is:

(a) a person that is not a U.S. person;

(b) a non-U.S. government, an international organization or any wholly owned agency or instrumentality of either of the foregoing; or

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(c) a tax-exempt entity;

(3) the amount and description of common units held, acquired or transferred for the beneficial owner; and

(4) specific information including the dates of acquisitions and transfers, means of acquisitions and transfers, and acquisition cost for purchases, as well as the amount of net proceeds from dispositions.

Brokers and financial institutions are required to furnish additional information, including whether they are U.S. persons and specific information on common units they acquire, hold or transfer for their own account. A penalty of $270 per failure, up to a maximum of $3,282,500 per calendar year, is imposed by the Internal Revenue Code for failure to report that information to us. The nominee is required to supply the beneficial owner of the common units with the information furnished to us.

Accuracy-Related Penalties

An additional tax equal to 20% of the amount of any portion of an underpayment of tax that is attributable to one or more specified causes, including negligence or disregard of rules or regulations, substantial understatements of income tax and substantial valuation misstatements, is imposed by the Internal Revenue Code. No penalty will be imposed, however, for any portion of an underpayment if it is shown that there was a reasonable cause for the underpayment of that portion and that the taxpayer acted in good faith regarding the underpayment of that portion. We do not anticipate that any accuracy-related penalties will be assessed against us.

Reportable Transactions

If we were to engage in a “reportable transaction,” we (and possibly our unitholders and others) would be required to make a detailed disclosure of the transaction to the IRS. A transaction may be a reportable transaction based upon any of several factors, including the fact that it is a type of tax avoidance transaction publicly identified by the IRS as a “listed transaction” or that it produces certain kinds of losses for partnerships, individuals, S corporations, and trusts in excess of $2.0 million in any single tax year, or $4.0 million in any combination of six successive tax years. Our participation in a reportable transaction could increase the likelihood that our federal income tax information return (and possibly our unitholders’ tax return) would be audited by the IRS. Please read “—Information Returns and Audit Procedures.”

Moreover, if we were to participate in a reportable transaction with a significant purpose to avoid or evade tax, or in any listed transaction, our unitholders may be subject to the following additional consequences:

Additional Withholding Requirements

Withholding taxes may apply to certain types of payments made to “foreign financial institutions” (as specially defined in the Internal Revenue Code) and certain other foreign entities. Specifically, a 30% withholding tax may be imposed on interest, dividends and other fixed or determinable annual or periodical gains, profits and income from sources within the United States (“FDAP Income”), or gross proceeds from the sale or other disposition of any property of a type that can produce interest or dividends from sources within the United States (“Gross Proceeds”) paid to a foreign financial institution or to a “non-financial foreign entity” (as

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specially defined in the Internal Revenue Code), unless (i) the foreign financial institution undertakes certain diligence and reporting, (ii) the non-financial foreign entity either certifies it does not have any substantial U.S. owners or furnishes identifying information regarding each substantial U.S. owner or (iii) the foreign financial institution or non-financial foreign entity otherwise qualifies for an exemption from these rules. If the payee is a foreign financial institution and is subject to the diligence and reporting requirements in clause (i) above, it must enter into an agreement with the U.S. Department of Treasury requiring, among other things, that it undertake to identify accounts held by certain U.S. persons or U.S.-owned foreign entities, annually report certain information about such accounts, and withhold 30% on payments to noncompliant foreign financial institutions and certain other account holders. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing these requirements may be subject to different rules.

These rules generally apply to payments of FDAP Income currently and generally will apply to payments of relevant Gross Proceeds made on or after January 1, 2019. Thus, to the extent we have FDAP Income or have Gross Proceeds on or after January 1, 2019, that are not treated as effectively connected with a U.S. trade or business (please read “—Tax-Exempt Organizations and Other Investors”), unitholders who are foreign financial institutions or certain other foreign entities, or persons that hold their common units through such foreign entities, may be subject to withholding on distributions they receive from us, or their distributive share of our income, pursuant to the rules described above. Prospective common unitholders should consult their own tax advisors regarding the potential application of these withholding provisions to their investment in our common units.

Recent Legislative Developments

The present U.S. federal income tax treatment of publicly traded partnerships, including us, or an investment in our common units may be modified by administrative, legislative or judicial interpretation at any time. For example, from time to time the U.S. President and members of the U.S. Congress propose and consider substantive changes to the existing federal income tax laws that would affect publicly traded partnerships.

Recently, the President signed into law comprehensive U.S. federal tax reform legislation that significantly reforms the Internal Revenue Code. This legislation, among other things, contains significant changes to the taxation of our operations and an investment in our common units, including a partial limitation on the deductibility of certain business interest expenses, a deduction for our unitholders relating to certain income from partnerships, immediate deductions for certain new investments instead of deductions for depreciation over time and the modification or repeal of many business deductions and credits, including the repeal of the deduction for certain domestic production activities. We continue to examine the impact of this tax reform legislation, and as its overall impact is uncertain, we note that this tax reform legislation could adversely affect the value of an investment in our common units. Prospective common unitholders are urged to consult their tax advisors regarding the impact of this tax reform legislation on an investment in our common units.

Additionally, in past years, legislation has been proposed that would, if enacted into law, make significant changes to U.S. tax laws, including to certain key U.S. federal income tax provisions currently available to oil and gas companies. Such legislative changes have included, but not been limited to, (i) the repeal of the percentage depletion allowance for oil and gas properties, (ii) the elimination of current deductions for intangible drilling and development costs, and (iii) an extension of the amortization period for certain geological and geophysical expenditures. It is unclear whether these or similar changes will be proposed again and, if enacted, how soon any such changes could take effect. Congress could consider, and could include, some or all of these proposals as part of future tax reform legislation.

Any modification to the U.S. federal income tax laws and interpretations thereof may or may not be retroactively applied and could make it more difficult or impossible to meet the exception for us to be treated as a partnership for U.S. federal income tax purposes. We are unable to predict whether any such changes will ultimately be enacted. However, it is possible that a change in law could affect us and may be applied retroactively. Any such changes could negatively impact the value of an investment in our common units.

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State, Local and Other Tax Considerations

In addition to U.S. federal income taxes, unitholders will be subject to other taxes, including state and local income taxes, unincorporated business taxes, and estate, inheritance or intangibles taxes that may be imposed by the various jurisdictions in which we conduct business or own property or in which the unitholder is a resident. We currently conduct business or own property in many states, most of which impose personal income taxes on individuals. Most of these states also impose an income tax on corporations and other entities. Moreover, we may also own property or do business in other states in the future that impose income or similar taxes on nonresident individuals. Although an analysis of those various taxes is not presented here, each prospective unitholder should consider their potential impact on his investment in us. A unitholder may be required to file state income tax returns and to pay state income taxes in any state in which we do business or own property, and such unitholder may be subject to penalties for failure to comply with those requirements. In some states, tax losses may not produce a tax benefit in the year incurred and also may not be available to offset income in subsequent taxable years. Some of the states may require us, or we may elect, to withhold a percentage of income from amounts to be distributed to a unitholder who is not a resident of the state. Withholding, the amount of which may be greater or less than a particular unitholder’s income tax liability to the state, generally does not relieve a nonresident unitholder from the obligation to file an income tax return. Amounts withheld may be treated as if distributed to unitholders for purposes of determining the amounts distributed by us. Please read “—Tax Consequences of Unit Ownership—Entity-Level Collections of Unitholder Taxes.” Based on current law and our estimate of our future operations, we anticipate that any amounts required to be withheld will not be material.

It is the responsibility of each unitholder to investigate the legal and tax consequences, under the laws of pertinent states and localities, of his investment in us. Accordingly, each prospective unitholder is urged to consult, and depend on, his own tax counsel or other advisor with regard to those matters. Further, it is the responsibility of each unitholder to file all tax returns that may be required of him. Sidley Austin LLP has not rendered an opinion on the state, local, alternative minimum tax or non-U.S. tax consequences of an investment in us.

INVESTMENT IN MID-CON ENERGY PARTNERS, LP BY EMPLOYEE BENEFIT PLANS

An investment in us by an employee benefit plan is subject to additional considerations because the investments of these plans are subject to the fiduciary responsibility and prohibited transaction provisions of ERISA and the restrictions imposed by Section 4975 of the Internal Revenue Code and provisions under any federal, state, local, non-U.S. or other laws or regulations that are similar to such provisions of the Internal Revenue Code or ERISA (collectively, “Similar Laws”). For these purposes the term “employee benefit plan” includes, but is not limited to, qualified pension, profit-sharing and stock bonus plans, Keogh plans, simplified employee pension plans and tax deferred annuities or individual retirement accounts or annuities, or IRAs, established or maintained by an employer or employee organization, and entities whose underlying assets are considered to include “plan assets” of such plans, accounts and arrangements (collectively, “Employee Benefit Plans”).

This summary is based on the provisions of ERISA and Section 4975 of the Internal Revenue Code (and related regulations and administrative and judicial interpretations) as of the date of this prospectus. This summary does not purport to be complete and future legislation, court decisions, administrative regulations, rulings or administrative pronouncements could significantly modify the requirements summarized below. Any of these changes may be retroactive and, therefore, may apply to transactions entered into prior to the date of their enactment or release.

Among other things, consideration should be given to:

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The person with investment discretion with respect to the assets of an Employee Benefit Plan or other employee benefit plan, often called a fiduciary, should determine whether an investment in us is authorized by the appropriate governing instrument and is a proper investment for the plan.

Section 406 of ERISA and Section 4975 of the Internal Revenue Code prohibit Employee Benefit Plans, and IRAs and Keogh plans that are not considered part of an Employee Benefit Plan, from engaging, either directly or indirectly, in specified transactions involving “plan assets” with parties that, with respect to the plan, are “parties in interest” under ERISA or “disqualified persons” under Section 4975 of the Internal Revenue Code unless a prohibited transaction exemption is available. A party in interest or disqualified person who engages in a non-exempt prohibited transaction may be subject to excise taxes and other penalties and liabilities under ERISA and Section 4975 of the Internal Revenue Code. In addition, the fiduciary of the Employee Benefit Plan that engaged in such a non-exempt prohibited transaction may be subject to penalties and liabilities under ERISA and the Internal Revenue Code. In this regard, the U.S. Department of Labor has issued prohibited transaction class exemptions (“PTCEs”) that may apply to the acquisition and holding of securities. These class exemptions include, without limitation, PTCE 84-14 respecting transactions determined by independent qualified professional asset managers, PTCE 90-1 respecting insurance company pooled separate accounts, PTCE 91-38 respecting bank collective investment funds, PTCE 9560 respecting life insurance company general accounts, PTCE 96-23 respecting transactions determined by in-house asset managers and the statutory exemption set forth in Section 408(b)(17) of ERISA and Section 4975(e)(29) of the Internal Revenue Code, respecting transactions with service providers for adequate compensation. There can be no assurance that all of the conditions of any such exemptions will be satisfied with respect to an investment in common units.

Employee Benefit Plans that are “governmental plans” (as defined in Section 3(32) of ERISA), certain “church plans” (as defined in Section 3(33) of ERISA or Section 4975(g)(3) of the Code) and non-U.S. plans (as described in Section 4(b)(4) of ERISA) are generally not subject to the requirements of ERISA or Section 4975 of the Code but may be subject to similar prohibitions under other applicable Similar Laws.

In addition to considering whether the purchase of common units is a prohibited transaction, a fiduciary should consider whether the plan will, by investing in us, be deemed to own an undivided interest in our assets, with the result that our general partner would also be a fiduciary of such plan and our operations would be subject to the regulatory restrictions of ERISA, including its prohibited transaction rules, as well as the prohibited transaction rules of Section 4975 of the Internal Revenue Code and any other applicable Similar Laws.

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The Department of Labor regulations and Section 3(42) of ERISA provide guidance with respect to whether, in certain circumstances, the assets of an entity in which Employee Benefit Plans acquire equity interests would be deemed “plan assets.” Under these rules, an entity’s assets would not be considered to be “plan assets” if, among other things:

Our assets should not be considered “plan assets” under these regulations because it is expected that the investment will satisfy the requirements in the first two bullet points above.

An Employee Benefit Plan, IRA or Keogh plan that is not part of an Employee Benefit Plan and each other plan subject to Similar Law, by investing in common units, will be deemed to represent that the acquisition, holding and disposition of the common units or any interest therein is consistent with the applicable fiduciary duty rules, if any, and will not result in a non-exempt prohibited transaction under Section 407 of ERISA or Section 4975 of the Internal Revenue Code or a violation of any applicable Similar Laws.

In light of the serious penalties imposed on persons who engage in prohibited transactions or other violations and other liabilities that could arise with respect to investment in common units by Employee Benefit Plans, IRAs or Keogh plans that are not part of an Employee Benefit Plan and plans subject to Similar Laws, plan fiduciaries contemplating a purchase of common units should consult with their own counsel regarding the consequences under ERISA, the Internal Revenue Code and other Similar Laws prior to any such investment.

SELLING UNITHOLDERS

This prospectus relates to 9,803,921 Common Units issuable to the Selling Unitholders upon conversion of 9,803,921 Class B Preferred Units and 4,048,766 Common Units issuable upon conversion of 4,048,766 Class B Preferred Units that we may issue from time to time in the future as payment in kind to the Selling Unitholders.

The following table sets forth information about the maximum number of Common Units that may be offered from time to time by each Selling Unitholder under this prospectus. The Selling Unitholders identified below may currently hold or acquire at any time Common Units in addition to those registered hereby. In addition, the Selling Unitholders identified below may sell, transfer, assign or otherwise dispose of some or all of their Common Units in private placement transactions exempt from or not subject to the registration requirements of the Securities Act. Accordingly, we cannot give an estimate as to the amount of Common Units that will be held by the Selling Unitholders upon termination of this offering. Information concerning the Selling Unitholders may change from time to time and, if necessary, we will supplement this prospectus accordingly.

To our knowledge, except as noted in the following paragraph, none of the Selling Unitholders has, or has had within the past three years, any position, office or other material relationship with us or any of our predecessors or affiliates, other than their ownership of units. Because each selling unitholder may sell all or a portion of the Common Units registered hereby, we cannot currently estimate the number or percentage of Common Units that each selling unitholder will hold upon completion of the applicable offering.

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Mid-Con Energy III, LLC, an affiliate of our general partner, obtained its Common Units as partial consideration in respect of its sale to us of multiple oil properties and acquired its Class B Preferred Units in connection with our private placement of such Class B Preferred Units in January 2018. As of April 24, 2018, Mid-Con Energy III, LLC owned 3,714,659 Common Units, representing approximately 12.2% of our outstanding Common Units, 930,223 Class A Preferred Units, representing approximately 8.0% of our outstanding Class A Preferred Units, and 522,875 Class B Preferred Units, representing approximately 5.3% of our outstanding Class B Preferred Units. Yorktown Energy Partners IX, L.P. and certain members of our management team, including Charles R. Olmstead and Jeffrey R. Olmstead, own membership interests in Mid-Con Energy III, LLC. In addition, certain of the officers and directors of our general partner serve as officers or directors of Mid-Con Energy III, LLC.

None of the selling unitholders is a broker-dealer registered under Section 15 of the Exchange Act, or an affiliate of a broker-dealer registered under Section 15 of the Exchange Act.

We have prepared the table and the related notes based on information supplied to us by the Selling Unitholders on or prior to April 24, 2018. We have not sought to verify such information. Other information about the Selling Unitholders may change over time.

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PLAN OF DISTRIBUTION

We are registering the Common Units included in this prospectus to permit the resale of such Common Units by the Selling Unitholders from time to time after the date of this prospectus. We will not receive any of the proceeds from the sale of the Common Units by the Selling Unitholders pursuant to this prospectus.

The Selling Unitholders may act independently of us in making decisions with respect to the timing, manner and size of each of their sales. The Selling Unitholders and their successors, including their donees, pledgees, transferees and successors-in-interest, may make sales of the Common Units from time to time though one or more methods specified herein or through a combination of any of such methods or any other method permitted pursuant to applicable law. Such offers and sales may be made directly to purchasers, though underwriters, to dealers, or through agents, on the NASDAQ or otherwise at prices and under terms prevailing at the time of the sale, at prices related to the then-current market price, at fixed prices, at varying prices determined at the time of sale, at privately negotiated prices or any other method permitted by law. These sales may be effected in one or more transactions, including:

in the over-the-counter market or on the NASDAQ or any national securities exchange or quotation service on which the Common Units may be listed or quoted at the time of the sale;

The Selling Unitholders may offer and sell some or all of the Common Units included in this prospectus by or through a broker-dealer in one or more, or a combination, of the following methods, without limitation:

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In connection with sales of the Common Units under this prospectus, the Selling Unitholders may enter into hedging transactions with broker-dealers, who may in turn engage in short sales of the Common Units in the course of hedging the positions they assume. The Selling Unitholders also may sell Common Units short and deliver them to close out the short positions or loan or pledge the Common Units to broker-dealers that in turn may sell them.

The Selling Unitholders may also directly make offers to sell some or all of the Common Units included in this prospectus to, or solicit offers to purchase such Common Units from, purchasers from time to time. If required, the prospectus supplement related to any such offering by the Selling Unitholders will set forth the terms of such offering.

If the Selling Unitholders use one or more underwriters in the sale, the underwriters will acquire the securities for their own account, and they may resell these securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. The securities may be offered and sold to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more of such firms. In connection with those sales, underwriters may be deemed to have received compensation from the Selling Unitholders in the form of underwriting discounts or commissions and may also receive commissions from purchasers of the Common Units for which they may act as agents. Underwriters may resell Common Units to or through dealers, and those dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from purchasers for which they may act as agents. The prospectus supplement related to any such offering will include any required information about underwriting compensation to be paid to underwriters, and any discounts, concessions or commissions underwriters allow to participating dealers, in connection with such offering. Unless otherwise disclosed in the prospectus supplement, the obligations of the underwriters to purchase securities will be subject to certain conditions precedent, and the underwriters will be obligated to purchase all of the securities offered by the prospectus supplement if any of the securities are purchased.

From time to time, the Selling Unitholders may sell the Common Units included in this prospectus to one or more dealers acting as principals. If required, the prospectus supplement related to any such offering will name such dealers as Selling Unitholders, and will include information about any compensation paid to the dealers, in such offering. The dealers, which may be deemed to be “underwriters” as that term is defined in the Securities Act, may then resell the Common Units to purchasers.

Any Selling Unitholder that is a broker-dealer or an affiliate of a broker-dealer may be deemed to be an “underwriter” within the meaning of Section 2(11) of the Securities Act. As a result, any profits derived by such Selling Unitholder on the sale of Common Units included in this prospectus and any discounts, commissions or concessions received by it may be deemed to be underwriting discounts and commissions under the Securities Act. Selling Unitholders who are deemed to be “underwriters” within the meaning of the Securities Act will be subject to prospectus delivery requirements of the Securities Act. Such Selling Unitholders may also be subject to certain statutory liabilities, including, but not limited to, Sections 11, 12 and 17 of the Securities Act.

The Selling Unitholders may sell the Common Units they hold using a public auction process in which the public offering price and the allocation of the Common Units will be determined through an auction conducted by an auction agent. The auction process may involve a modified “Dutch auction” mechanic in which the auction agent (and potentially other brokers) will receive and accept bids from bidders at either a minimum bid price or at price increments in excess of the minimum bid price. The auction agent and any such other brokers may be the

underwriters of the offering or their affiliates. After the auction closes and those bids become irrevocable, the

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auction agent will determine the clearing price for the sale of the Common Units offered in the auction, and subject to agreement between the Selling Unitholders and the underwriters to proceed with the offering, the Common Units will be allocated to winning bidders by the underwriters. If the Selling Unitholders use a public auction process to sell the Common Units, a more detailed description of the procedures to be used in connection with any such auction will be set forth in a prospectus supplement related to such offering.

The Selling Unitholders may designate broker-dealers as agents from time to time to solicit offers from purchasers to purchase the Common Units included in this prospectus, or to sell such Common Units in ordinary brokerage transactions, on their behalf. If required, the prospectus supplement related to any such offering will name such agents, and will include information about any commissions paid to the agents in such offering. Agents may be deemed to be “underwriters” as that term is defined in the Securities Act in such offering.

The Selling Unitholders or their respective underwriters, broker-dealers, or agents may make sales of the Common Units that are deemed to be an at-the-market offering as defined in Securities Act Rule 415, which includes sales of such Common Units made directly on or through the NASDAQ, the existing trading market for the Common Units, or in the over-the-counter market or otherwise.

From time to time, one or more of the Selling Unitholders may pledge, hypothecate or grant a security interest in some or all of the securities owned by them. In the event of default, the pledgees, secured parties or persons to whom the securities have been hypothecated will, upon foreclosure, be deemed to be selling unitholders under this prospectus. The number of Common Units offered under this prospectus by a given Selling Unitholder will decrease as and when such events occur. In addition, a Selling Unitholder may, from time to time, sell Common Unit short, and, in those instances, this prospectus may be delivered in connection with the short sales, and the Common Units offered under this prospectus may be used to cover short sales.

In addition to the transactions described above, the Selling Unitholders may sell the Common Units included in this prospectus in compliance with Rule 144 or Rule 144A of the Securities Act, if available, or pursuant to other available exemptions from the registration requirements under the Securities Act, rather than pursuant to this prospectus.

The Selling Unitholders and any other persons participating in the sale or distribution of Common Units will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M. Regulation M may limit the timing of purchases and sales of any of the Common Units by the Selling Unitholders and any other such persons. In addition, Regulation M may restrict the ability of any person engaged in the distribution of the Common Units to engage in market-making activities with respect to the Common Units for a period of up to five business days before the distribution. This may affect the marketability of the Common Units and the ability of any person or entity to engage in market-making activities with respect to the Common Units.

We have agreed to indemnify, in certain circumstances, the Selling Unitholders against certain liabilities to which they may become subject in connection with the sale of the Common Units included in this prospectus, including liabilities arising under the Securities Act. The Selling Unitholders have agreed to indemnify us in certain circumstances against certain liabilities to which we may become subject in connection with the sale of such Common Units, including liabilities arising under the Securities Act. We and the Selling Unitholders may agree to indemnify underwriters, dealers and agents who participate in the distribution of the Common Units included in this prospectus against certain liabilities to which they may become subject in connection with the sale of such Common Units, including liabilities arising under the Securities Act.

Certain of the underwriters and their affiliates may be customers of, may engage in transactions with and may perform services for us or our affiliates in the ordinary course of business.

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We have agreed to pay the expenses of the registration of the Common Units offered and sold by the Selling Unitholders under the registration statement of which this prospectus forms a part, including, but not limited to, all registration and filing fees, fees and expenses of our counsel and accountants, and reasonable fees and expenses of one counsel for the Selling Unitholders. The Selling Unitholders will pay any underwriting discounts and commissions applicable to the Common Units sold by the Selling Unitholders.

A prospectus and accompanying prospectus supplement in electronic form may be made available on the websites maintained by the underwriters of a given offering. The underwriters may agree to allocate a number of securities for sale to their online brokerage account holders. Such allocations of securities for internet distributions will be made on the same basis as other allocations. In addition, securities may be sold by the underwriters to securities dealers who resell securities to online brokerage account holders.

The aggregate maximum compensation the underwriters will receive in connection with the sale of any securities under this prospectus and the registration statement of which it forms a part will not exceed 10% of the gross proceeds from such sale.

Because the Financial Industry Regulatory Authority (“FINRA”) views our Common Units as interests in a direct participation program, any offering of Common Units under the registration statement of which this prospectus forms a part will be made in compliance with FINRA Rule 2310.

To the extent required, this prospectus may be amended or supplemented from time to time to describe a specific plan of distribution. The place and time of delivery for the securities in respect of which this prospectus is delivered will be set forth in the accompanying prospectus supplement.

In connection with offerings of securities under the registration statement of which this prospectus forms a part and in compliance with applicable law, underwriters, brokers or dealers may engage in transactions that stabilize or maintain the market price of the securities at levels above those that might otherwise prevail in the open market. Specifically, underwriters, brokers or dealers may over-allot in connection with offerings, creating a short position in the securities for their own accounts. For the purpose of covering a syndicate short position or stabilizing the price of the securities, the underwriters, brokers or dealers may place bids for the securities or effect purchases of the securities in the open market. Finally, the underwriters may impose a penalty whereby selling concessions allowed to syndicate members or other brokers or dealers for distribution of the securities in offerings may be reclaimed by the syndicate if the syndicate repurchases previously distributed securities in transactions to cover short positions, in stabilization transactions or otherwise. These activities may stabilize, maintain or otherwise affect the market price of the securities, which may be higher than the price that might otherwise prevail in the open market, and, if commenced, may be discontinued at any time. These transactions may be effected on or through the NASDAQ, the existing trading market for the Common Units, or in the over-the-counter market or otherwise.

VALIDITY OF THE SECURITIES

The validity of the securities offered by this prospectus will be passed upon for us by Sidley Austin LLP, Houston, Texas and Washington, D.C. Sidley Austin LLP will also render an opinion on the material tax consequences regarding such securities. If certain legal matters in connection with an offering of the securities made by this prospectus and a related prospectus supplement are passed on by counsel for the Selling Unitholders or underwriters of such offering, that counsel will be named in the applicable prospectus supplement related to that offering.

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EXPERTS

The financial statements incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance upon the report of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

The information incorporated by reference in this prospectus relating to the estimated quantities of our proved oil and natural gas reserves and the net present value of such reserves as of December 31, 2017 set forth in this prospectus are based upon reserve reports prepared by Cawley, Gillespie & Associates, Inc.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

Set forth below are the expenses (other than underwriting discounts and commissions and any expenses of the Selling Unitholders) expected to be incurred in connection with the issuance and distribution of the securities registered hereby. With the exception of the SEC registration fee, the amounts set forth below are estimates.

Item 15. Indemnification of Directors and Officers

Mid-Con Energy Partners, LP

The partnership agreement of Mid-Con Energy Partners, LP provides that the partnership will, to the fullest extent permitted by law but subject to the limitations expressly provided therein, indemnify and hold harmless its general partner, any Departing Partner (as defined therein), any person who is or was an affiliate of the general partner, including any person who is or was a member, partner, officer, director, fiduciary or trustee of the general partner, any Departing Partner, any Group Member (as defined therein) or any affiliate of the general partner, any Departing Partner or any Group Member, or any person who is or was serving at the request of the general partner, including any affiliate of the general partner or any Departing Partner or any affiliate of any Departing Partner as an officer, director, member, partner, fiduciary or trustee of another person, or any person that the general partner designates as a Partnership Indemnitee for purposes of the partnership agreement (each, a “Partnership Indemnitee”) from and against any and all losses, claims, damages, liabilities (joint or several), expenses (including legal fees and expenses), judgments, fines, penalties, interest, settlements or other amounts arising from any and all claims, demands, actions, suits or proceedings, whether civil, criminal, administrative or investigative, in which any Partnership Indemnitee may be involved, or is threatened to be involved, as a party or otherwise, by reason of its status as a Partnership Indemnitee, provided that the Partnership Indemnitee shall not be indemnified and held harmless if there has been a final and non-appealable judgment entered by a court of competent jurisdiction determining that, in respect of the matter for which the Partnership Indemnitee is seeking indemnification, the Partnership Indemnitee engaged in fraud, willful misconduct or gross negligence or, a breach of its obligations under the partnership agreement of Mid-Con Energy Partners, LP or a breach of its fiduciary duty in the case of a criminal matter, acted with knowledge that the Partnership Indemnitee’s conduct was unlawful. This indemnification would under certain circumstances include indemnification for liabilities under the Securities Act. To the fullest extent permitted by law, expenses (including legal fees and expenses) incurred by a Partnership Indemnitee who is indemnified pursuant to the partnership agreement in defending any claim, demand, action, suit or proceeding shall, from time to time, be advanced by the partnership prior to a determination that the Partnership Indemnitee is not entitled to be indemnified upon receipt by the partnership of any undertaking by or on behalf of the Partnership Indemnitee to repay such amount if it shall be determined that the Partnership Indemnitee is not entitled to be indemnified under the partnership agreement provided, however, there shall be no advancement of costs or fees to any Partnership Indemnitee in the event of a derivative or direct action against such Person brought by at least a Majority in Interest of the Limited Partners. Any indemnification under these provisions will be only out of the assets of the partnership. Section 17-108 of the Delaware Revised Uniform Limited Partnership Act empowers a Delaware limited partnership to indemnify and hold harmless any partner or other persons from and against all claims and demands whatsoever.

II-1

Any underwriting agreement entered into in connection with the sale of the securities offered pursuant to this registration statement will provide for indemnification of officers and directors of our general partner, including liabilities under the Securities Act.

Mid-Con Energy GP, LLC

Section 18-108 of the Delaware Limited Liability Company Act (the “Delaware LLC Act”), provides that, subject to such standards and restrictions, if any, as are set forth in its limited liability company agreement, a Delaware limited liability company may, and shall have the power to, indemnify and hold harmless any member or manager or other person from and against any and all claims and demands whatsoever. The limited liability company agreement of Mid-Con Energy GP, LLC, our general partner, provides that our general partner shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he or she is or was a director or officer of our general partner, or is or was serving at the request of our general partner as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise (an “indemnitee”), against expenses (including reasonable attorney’s fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such indemnitee in connection with such action, suit or proceeding to the full extent permitted by the Delaware LLC Act, upon such determination having been made as to such indemnitee’s good faith and conduct as is required by the Delaware LLC Act. The limited liability company agreement of our general partner also provides that expenses incurred in defending a civil or criminal action, suit or proceeding shall be paid by our general partner in advance of the final disposition of such action, suit or proceeding to the extent, if any, authorized by our general partner’s sole member in accordance with the provisions of the Delaware LLC Act, upon receipt of an undertaking by or on behalf of the indemnitee to repay such amount unless it shall ultimately be determined that indemnitee is entitled to be indemnified by our general partner. Officers, directors and affiliates of our general partner are also indemnified by us, as described above.

Directors’ and Officers’ Liability Insurance

Mid-Con Energy Partners, LP is authorized to purchase (or to reimburse its general partner for the costs of) insurance against liabilities asserted against and expenses incurred by its general partner, its affiliates and such other persons as the respective general partners may determine and described in the paragraphs above in connection with their activities, whether or not they would have the power to indemnify such person against such liabilities under the provisions described in the paragraphs above. The general partner has purchased insurance covering its officers and directors against liabilities asserted and expenses incurred in connection with their activities as officers and directors of our general partner or any of its direct or indirect subsidiaries.

Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers or persons controlling the registrant pursuant to the foregoing provisions, the registrant has been informed that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is therefore unenforceable.

Item 16. Exhibits

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Item 17. Undertakings

(a) The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) To include any prospectus required by section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

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provided, however, that paragraphs (a)(1)(i), (ii), and (iii) do not apply if the registration statement is on Form S-3 and the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

(i) If the registrant is relying on Rule 430B:

(A) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(B) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date; or

(ii) If the registrant is subject to Rule 430C, each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’s annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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(c) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers, and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

(d) The undersigned registrant hereby undertakes that:

(1) For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b) (1) or (4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective.

(2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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SIGNATURES

Pursuant to the requirements of the Securities Act, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Tulsa, State of Oklahoma, on May 1, 2018.

POWER OF ATTORNEY

Each person whose signature appears below hereby constitutes and appoints Charles L. McLawhorn, III and Jeffrey R. Olmstead, and each of them, any of whom may act without joinder of the others, his or her lawful attorneys-in-fact and agents, with full power of substitution and re-substitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments to this registration statement, including any and all post-effective amendments, and to file the same with all exhibits thereto and other documents necessary or advisable in connection therewith, with the Securities and Exchange Commission, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and each of them, or the substitute or substitutes of any of them, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed below by the following persons in the capacities and on the dates indicated.

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