UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934



                             CONTANGO OIL & GAS CO.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $0.04 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    21075N204
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                   May 3, 2006
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
13G is filed:

                [ ] Rule 13d-1(b)
                [X] Rule 13d-1(c)
                [ ] Rule 13d-1(d)


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                WS Capital, L.L.C.
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          355,800
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     355,800
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    355,800
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    2.4%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     HC/OO
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                WS Capital Management, L.P.
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          355,800
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     355,800
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    355,800
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    2.4%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     IA/PN
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                WSV Management, L.L.C.
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          382,100
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     382,100
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    382,100
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    2.6%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     IA/OO
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                WS Ventures Management, L.P.
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          382,100
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     382,100
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    382,100
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    2.6%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     HC/PN
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                Reid S. Walker
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          737,900
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     737,900
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    737,900
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    5.0%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     HC/IN
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                G. Stacy Smith
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          737,900
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     737,900
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    737,900
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    5.0%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     HC/IN
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





CUSIP NO.   21075N204
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                Patrick P. Walker
--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:          382,100
                                          --------------------------------------
                                      (6) Shared Voting Power:              0
                                          --------------------------------------
                                      (7) Sole Dispositive Power:     382,100
                                          --------------------------------------
                                      (8) Shared Dispositive Power:         0
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                    382,100
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    2.6%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     HC/IN
--------------------------------------------------------------------------------

*  Based on 14,749,085 shares issued and outstanding as of February 10, 2006, as
reported by the issuer in its  Quarterly  Report on Form 10-Q for the  quarterly
period ended on December 31, 2005.





          This  Schedule  13G relates to the common  stock  ("Common  Stock") of
          Contango  Oil & Gas Co.  acquired by (i) WS Capital,  L.L.C.,  a Texas
          limited  liability  company  ("WS  Capital"),  for the  account of (1)
          Walker Smith Capital,  L.P., a Texas limited partnership  ("WSC"), (2)
          Walker  Smith  Capital  (Q.P.),  L.P.,  a  Texas  limited  partnership
          ("WSCQP"), (3) Walker Smith International Fund, Ltd., a British Virgin
          Islands   exempted   company  ("WS   International"),   and  (4)  HHMI
          Investments,  L.P., a Delaware limited partnership ("HHMI"),  and (ii)
          WSV Management, L.L.C., a Texas limited liability company ("WSV"), for
          the  account  of  (1) WS  Opportunity  Fund,  L.P.,  a  Texas  limited
          partnership  ("WSO"),  (2) WS Opportunity  Fund (Q.P.),  L.P., a Texas
          limited   partnership   ("WSOQP"),   and  (3)  WS   Opportunity   Fund
          International,   Ltd.,  a  Cayman  Islands   exempted   company  ("WSO
          International").  WS  Capital  is the  general  partner  of WS Capital
          Management,  L.P., a Texas  limited  partnership  ("WSC  Management"),
          which is the  general  partner  of WSC and  WSCQP  and the  investment
          manager for WS International  and HHMI.  WSV is the general partner of
          WS Ventures  Management,  L.P., a Texas limited partnership  ("WSVM"),
          which is the  general  partner  of WSO and  WSOQP  and the  agent  and
          attorney-in-fact  for WSO  International.  Reid S. Walker and G. Stacy
          Smith are principals of WS Capital and WSV, and Patrick P. Walker is a
          principal  of WSV.  Each of the  reporting  persons  hereby  expressly
          disclaims   membership  in  a  "group"  under  Section  13(d)  of  the
          Securities  Exchange  Act  of  1934  and  the  rules  and  regulations
          thereunder with respect to the shares of Common Stock reported herein,
          and this Schedule 13G shall not be deemed to be an admission  that any
          such reporting person is a member of such a group.


Item 1(a).  Name Of Issuer:  CONTANGO OIL & GAS CO.


Item 1(b).  Address of Issuer's Principal Executive Offices:
            3700 Buffalo Speedway, Suite 960
            Houston, Texas 77098


Item 2(a).  Name of Person Filing:

            See Item 1 of each cover page.


Item 2(b).  Address of Principal Business Office or, if none, Residence:
            300 Crescent Court, Suite 1111
            Dallas, Texas  75201

Item 2(c).  Citizenship:  See Item 4 of each cover page.

Item 2(d).  Title of Class of Securities:
            Common stock, par value $0.04 per share

Item 2(e).  CUSIP No.:   21075N204


Item 3.     Not Applicable





Item 4.  Ownership:

         (a)   Amount Beneficially Owned:

               Reid S. Walker and G. Stacy Smith  are the  beneficial  owners of
               737,900 shares of Common Stock, which includes (i) 355,800 shares
               beneficially  owned  by WS  Capital  and WSC  Management  for the
               accounts  of WSC,  WSCQP and WS  International  and HHMI and (ii)
               382,100  shares  beneficially  owned  by WSV  and  WSVM  for  the
               accounts of WSO, WSOQP, WSO International.

               Patrick P. Walker is the  beneficial  owner of 382,100  shares of
               Common Stock, reflecting 382,100 shares beneficially owned by WSV
               and WSVM for the accounts of WSO, WSOQP and WSO International.

               WS  Capital  and WSC  Management  are the  beneficial  owners  of
               355,800 shares of Common Stock for the accounts of WSC, WSCQP, WS
               International and HHMI.

               WSV and WSVM are the  beneficial  owners  of  382,100  shares  of
               Common   Stock   for  the   accounts   of  WSO,   WSOQP  and  WSO
               International.


         (b)    Percent of Class:   See Item 11 of each cover page.

         (c)    Number of Shares as to which such person has:

                 (i)  sole power to vote or to direct the vote:
                      See Item 5 of each cover page.

                 (ii) shared power to vote or to direct the vote:
                      See Item 6 of each cover page.

                (iii) sole power to dispose or to direct the disposition of:
                      See Item 7 of each cover page.

                 (iv) shared power to dispose or to direct the disposition of:
                      See Item 8 of each cover page.



Item 5.  Ownership of Five Percent or Less of a Class:  Not applicable.


Item 6.  Ownership of More Than Five Percent on Behalf of Another Person:  Not
         applicable.


Item 7.  Identification  and Classification of the Subsidiary Which Acquired the
         Securities:

          WSC Management is an investment  adviser  registered with the State of
          Texas and, as such, has beneficial ownership of the securities held by
          its clients, WSC, WSCQP, WS International and HHMI.  WS Capital is the
          general partner of WSC  Management.  Reid S. Walker and G. Stacy Smith
          are  the  sole  principals  of  WS  Capital,  and  therefore  exercise
          investment discretion and control with respect to the shares of Common
          Stock beneficially owned by WSC Management's clients.





          WSV is an investment adviser registered with the State of Texas and is
          the general partner of WSVM and, as such, has beneficial  ownership of
          the securities held by its clients,  WSO, WSOQP and WSO International.
          Reid S. Walker,  G. Stacy  Smith and  Patrick P. Walker are  the  sole
          principals of WSV, and therefore  exercise  investment  discretion and
          control with respect to the shares of Common Stock  beneficially owned
          by WSV's clients.



Item 8.  Identification and Classification of Members of the Group:  Not
         applicable.


Item 9.  Notice of Dissolution of Group:  Not applicable.


Item 10.  Certification:

          By  signing  below I certify  that,  to the best of my  knowledge  and
belief, the securities  referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing  the control of the
issuer of such  securities  and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.






                                    SIGNATURE


          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

                                May 8, 2006


                                WS CAPITAL, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS CAPITAL MANAGEMENT, L.P.

                                By:  WS Capital, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WSV MANAGEMENT, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS VENTURES MANAGEMENT, L.P.

                                By:  WSV Management, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member







                                        /s/ Reid S. Walker
                                       -----------------------------------------
                                        REID S. WALKER



                                        /s/ G. Stacy Smith
                                       -----------------------------------------
                                        G. STACY SMITH



                                        /s/ Patrick P. Walker
                                       -----------------------------------------
                                        PATRICK P. WALKER



      Attention: Intentional misstatements or omissions of fact constitute
                Federal criminal violations (See 18 U.S.C. 1001)





                                                                       EXHIBIT 1

                             JOINT FILING AGREEMENT


          In accordance with  Rule 13d-1(k)  promulgated  under  the  Securities
Exchange  Act of 1934,  as amended,  the persons  named below agree to the joint
filing  on  behalf  of each of  them a  Statement  on  Schedule  13G  (including
amendments  thereto)  with regard to the common  stock of Contango Oil & Gas Co.
and further agree that this Joint Filing  Agreement be included as an Exhibit to
such joint filings. In evidence thereof, the undersigned, being duly authorized,
hereby execute this Joint Filing Agreement as of May 8, 2006.


                                WS CAPITAL, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS CAPITAL MANAGEMENT, L.P.

                                By:  WS Capital, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WSV MANAGEMENT, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS VENTURES MANAGEMENT, L.P.

                                By:  WSV Management, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member







                                        /s/ Reid S. Walker
                                       -----------------------------------------
                                        REID S. WALKER



                                        /s/ G. Stacy Smith
                                       -----------------------------------------
                                        G. STACY SMITH



                                        /s/ Patrick P. Walker
                                       -----------------------------------------
                                        PATRICK P. WALKER