Sec Form 4 Filing - ANADARKO PETROLEUM CORP @ Western Midstream Operating, LP - 2019-02-28

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 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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person ANADARKO PETROLEUM CORP 2. Issuer Name and Ticker or Trading Symbol Western Midstream Operating, LP [ NONE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1201 LAKE ROBBINS DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 02/28/2019 (Street) THE WOODLANDS, TX77380 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Common Units representing limited partner interests 02/28/2019 A 14,681,388 A 66,824,814 I See footnotes ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) Common Units representing limited partner interests 02/28/2019 A 45,760,201 A 112,585,015 I See footnotes ( 3 ) ( 4 ) ( 5 ) Common Units representing limited partner interests 02/28/2019 A 105,624,704 A 218,209,719 I See footnotes ( 3 ) ( 4 ) ( 5 ) Common Units representing limited partner interests 02/28/2019 D 218,209,719 D 0 I See footnotes ( 3 ) ( 4 ) ( 5 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Class C units representing limited partner interests ( 3 ) ( 4 ) ( 5 ) 02/28/2019 D 14,681,388 ( 3 )( 4 )( 5 ) ( 3 )( 4 )( 5 ) Common units representing limited partner interests 14,681,388 ( 3 ) ( 4 ) ( 5 ) 0 I See footnotes ( 1 ) ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other ANADARKO PETROLEUM CORP 1201 LAKE ROBBINS DRIVE THE WOODLANDS, TX77380 X WESTERN GAS RESOURCES INC 1201 LAKE ROBBINS DR. THE WOODLANDS, TX77380 X Western Midstream Partners, LP 1201 LAKE ROBBINS DR. THE WOODLANDS, TX77380 X Western Gas Equity Holdings, LLC 1201 LAKE ROBBINS DR. THE WOODLANDS, TX77380 X Kerr-McGee Worldwide Corp 1201 LAKEROBBINSDR. THE WOODLANDS, TX77380 X APC Midstream Holdings, LLC 1201 LAKE ROBBINS DR. THE WOODLANDS, TX77380 X Signatures /s/ Philip H. Peacock, Authorized Signatory of Anadarko Petroleum Corporation 03/04/2019 Signature of Reporting Person Date /s/ Philip H. Peacock, Authorized Signatory of Western Gas Resources, Inc. 03/04/2019 Signature of Reporting Person Date s/ Philip H. Peacock, Senior Vice President, General Counsel and Corporate Secretary of the general Partner of Western Gas Equity Partners, LP 03/04/2019 Signature of Reporting Person Date /s/ Philip H. Peacock, Senior Vice President, General Counsel and Corporate Secretary Western Gas Equity Holdings, LLC 03/04/2019 Signature of Reporting Person Date /s/ Philip H. Peacock, Authorized Signatory for Kerr-McGee Worldwide Corporation 03/04/2019 Signature of Reporting Person Date /s/ Philip H. Peacock, Authorized Signatory for APC Midstream Holdings, LLC 03/04/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On February 27, 2019, (i) Western Gas Equity Partners, LP ("WGP") owned 50,132,046 common units of Western Gas Partners, LP ("WES") and 100% of the membership interests in WES's general partner, Western Gas Holdings, LLC ("WES GP"), and APC Midstream Holdings, LLC ("AMH") owned 1,562,251 WES common units and 14,681,388 Class C units, (ii) Western Gas Resources, Inc. ("WGR") owned (A) all of the membership interests of WGP GP, the general partner of WGP, (B) 77.8% of the issued and outstanding limited partner interests in WGP, and (Z) 100% of the membership interests in AMH, (iii) WGP GP owns a 0% noneconomic general partner interest in WGP, and (iv) Anadarko Petroleum Corporation ("Anadarko") owned all of the issued and outstanding shares of common stock of WGR. ( 2 )(Continued from Footnote 1) Accordingly, WGP GP, WGR and Anadarko may be deemed to be indirect beneficial owners of any securities held by WGP, and WGR and Anadarko may be deemed to be indirect beneficial owners of any securities held by AMH. Also prior to the Effective Time, (i) Kerr-McGee Worldwide Corporation ("KWC") owned 449,129 WES common units, (ii) Kerr-McGee Corporation ("KMG") owned 100% of KWC, and (iii) Anadarko owned 100% of KMG. Accordingly, KMG and Anadarko may be deemed to be indirect beneficial owners of any securities held by KWC. ( 3 )On February 28, 2019 (the "Effective Time"), WES and the other parties thereto consummated the transactions contemplated by the Contribution Agreement and Agreement and Plan of Merger (the "Merger Agreement"), dated as of November 7, 2018, by and among WES, WES GP, WGP, WGP GP, Anadarko, Anadarko E&P Onshore LLC, Clarity Merger Sub, LLC and certain other affiliates of Anadarko and WES. Immediately prior to the Effective Time and as contemplated by the Merger Agreement, (i) affiliates of Anadarko contributed certain midstream assets to subsidiaries of WES in exchange for cash and 45,760,201 WES common units (the "Contribution"); (ii) all outstanding Class C Units were converted into WES common units on a one-for-one basis (the "Class C Unit Conversion"); and (iv) the incentive distribution rights ("IDRs") and 2,583,068 general partner units of WES held by WES GP were converted into 105,624,704 WES common units and a non-economic general partner interest in WES (the "IDR Conversion"). ( 4 )Upon the Effective Time and as contemplated by the Merger Agreement, (i) 39,384,917 of the 45,760,201 WES common units received as part of the Contribution were converted into WGP common units at a ratio of 1.406 WGP common units for every on WES Common Unit, (ii) all 14,681,388 WES common units issued as part of the Class C Conversion, as well as all other WES common units held by AMH and KWC, were converted into WGP common units at a ratio of 1.525 WGP common units for every WES common unit, (iii) WES common units held by WGP, including the units issued in the IDR Conversion and the remaining units issued as part of the Contribution, continued outstanding as privately held limited partner interests in WES. ( 5 )(Continued from Footnote 4) Also following the Effective Time, (i) WES common units, which traded on the New York Stock Exchange ("NYSE") under the symbol "WES" through February 27, 2019, were delisted from the NYSE and ceased trading and (ii) WGP common units, which previously traded on the NYSE under the symbol "WGP" through February 27, 2019, began trading under the symbol "WES" on the NYSE beginning on February 28, 2019.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

Note: File three copie s of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.