Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
ARCLIGHT ENERGY PARTNERS FUND V, L.P.
  2. Issuer Name and Ticker or Trading Symbol
American Midstream Partners, LP [AMID]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
SEE REMARKS
(Last)
(First)
(Middle)
C/O ARCLIGHT CAPITAL PARTNERS, LLC, 200 CLARENDON STREET, 55TH FLOOR
3. Date of Earliest Transaction (Month/Day/Year)
02/15/2019
(Street)

BOSTON, MA 02117
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series A-1 Convertible Preferred Units (1) 02/15/2019   A   232,751     (1)   (1) Common Units (limited partner interests) 281,861 $ 13.66 7,940,322 I See Footnote (1)
SerieA-2 Convertible Preferred Units (2) 02/15/2019   A   99,717     (2)   (2) Common Units (limited partner interests) 127,747 $ 13.66 3,401,875 I See Footnote (2)
Series C Convertible Preferred Untis (3) 02/15/2019   A   272,688     (3)   (3) Common Units (limited partner interests) 273,069 $ 13.98 9,514,330 I See Footnote (3)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ARCLIGHT ENERGY PARTNERS FUND V, L.P.
C/O ARCLIGHT CAPITAL PARTNERS, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
  X   X   SEE REMARKS
Magnolia Infrastructure Holdings, LLC
C/O ARCLIGHT CAPITAL PARTNERS, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
    X    
Magnolia Infrastructure Partners, LLC
C/O ARCLIGHT CAPITAL PARTNERS, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
    X    
High Point Infrastructure Partners, LLC
C/O ARCLIGHT CAPITAL PARTNERS, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
    X    
ArcLight Capital Holdings, LLC
C/O ARCLIGHT CAPITAL PARTNERS, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
    X    
ArcLight Capital Partners, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
    X    
Revers Daniel R
C/O ARCLIGHT CAPITAL PARTNERS, LLC
200 CLARENDON STREET, 55TH FLOOR
BOSTON, MA 02117
    X    

Signatures

 /s/ Daniel R. Revers FUND V By: ArcLight PEF GP V, LLC, its General Partner By: ArcLight Capital Holdings, LLC, its Manager By: ACHP II, L.P., its Managing Member By: ACH GP, LLC, its General Partner By: Daniel R. Revers, Manager   02/19/2019
**Signature of Reporting Person Date

 /s/ Daniel R. Revers, President MAGNOLIA INFRASTRUCTURE HOLDINGS, LLC By: Daniel R. Revers, President   02/19/2019
**Signature of Reporting Person Date

 /s/ Daniel R. Revers MAGNOLIA INFRASTRUCTURE PARTNERS, LLC By: Daniel R. Revers, President   02/19/2019
**Signature of Reporting Person Date

 /s/ Daniel R. Revers HIGH POINT INFRASTRUCTURE PARTNERS, LLC By: Daniel R. Revers, President   02/19/2019
**Signature of Reporting Person Date

 /s/ Daniel R. Revers ARCLIGHT CAPITAL HOLDINGS, LLC By: ACHP II, L.P., its Managing Member By: ACH GP, LLC, its General Partner By: Daniel Revers, Manager   02/19/2019
**Signature of Reporting Person Date

 /s/ Daniel R. Revers ARCLIGHT CAPITAL PARTNERS, LLC By: Daniel R. Revers, Managing Partner   02/19/2019
**Signature of Reporting Person Date

 /s/ Daniel R. Revers   02/19/2019
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.2811 at any time.
(2) Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.2811 at any time.
(3) Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0014 at any time.
 
Remarks:
(A) ArcLight Capital Holdings, LLC ("ArcLight") is the sole manager and member of ArcLight Capital Partners, LLC ("ArcLight Partners" and, together with ArcLight Holdings and ArcLight Energy Partners Fund V, L.P. ("Fund V"), the "ArcLight Entities"). ArcLight Partners is the investment adviser to Fund V. ArcLight Holdings is the manager of the general partner of Fund V. Mr. Revers is a manager of ArcLight Holdings, and a managing partner of ArcLight Partners and has certain voting and dispositive rights as a member of ArcLight Partners' investment committee. Fund V directly owns Busbar II, LLC ("Busbar") and Magnolia Holdings, which owns Magnolia. Fund V, through Magnolia, also owns approximately 90% of the ownership interest in HPIP. HPIP and AMID GP Holdings LLC, a subsidiary of Magnolia Holdings, own respectively, approximately 77% and 23% of American Midstream GP, LLC (the "General Partner"), the general partner of the Issuer. As a result, the ArcLight Entities and Mr. Revers may be deemed to indirectly beneficially own the securities of the Issuer held by Magnolia Holdings, Busbar, Magnolia, HPIP and the General Partner, but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein. (B) Some of the entity names in the signature blocks have been abbreviated due to the limitations of the electronic filing system. Please refer to the text above for the complete legal names of such entities.

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