Sec Form 4 Filing - OCCIDENTAL PETROLEUM CORP /DE/ @ Western Midstream Partners, LP - 2021-12-13

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

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1. Name and Address of Reporting Person OCCIDENTAL PETROLEUM CORP /DE/ 2. Issuer Name and Ticker or Trading Symbol Western Midstream Partners, LP [ WES] 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) 5 GREENWAY PLAZA, SUITE 110 3. Date of Earliest Transaction (MM/DD/YY) 12/13/2021 (Street) HOUSTON, TX77046 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 (LIMITED PARTNER INTERESTS) 12/13/2021 S( 1 ) 2,500,000 D $ 20.09( 1 ) 200,281,578 I See Footnotes( 2 )( 3 )( 4 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other OCCIDENTAL PETROLEUM CORP /DE/ 5 GREENWAY PLAZA SUITE 110 HOUSTON, TX77046 X WESTERN GAS RESOURCES INC 1099 18TH STREET, SUITE 1200 DENVER, CO80202-1955 X APC Midstream Holdings, LLC 5 GREENWAY PLAZA SUITE 110 HOUSTON, TX77046 X WGR Asset Holding Co LLC 5 GREENWAY PLAZA SUITE 110 HOUSTON, TX77046 X Kerr-McGee Worldwide Corp 5 GREENWAY PLAZA SUITE 110 HOUSTON, TX77046 Former 10% Owner Anadarko USH1 Corp 5 GREENWAY PLAZA SUITE 110 HOUSTON, TX77046 X Signatures /s/ Nicole E. Clark of Western Gas Resources 12/15/2021 Signature of Reporting Person Date /s/ Nicole E. Clark of APC Midstream Holdings, LLC 12/15/2021 Signature of Reporting Person Date /s/ Nicole E. Clark of WGR Asset Holding Company, LLC 12/15/2021 Signature of Reporting Person Date /s/ Nicole E. Clark of Kerr- McGee Worldwide Corporation 12/15/2021 Signature of Reporting Person Date /s/ Nicole E. Clark of Anadarko USH1 12/15/2021 Signature of Reporting Person Date /s/ Nicole E. Clark of Kerr-McGee Corporation 12/15/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On December 7, 2021, Western Midstream Partners, LP (the "Issuer") entered into unit purchase agreement with WGR Asset Holding Company LLC ("WGRAH") pursuant to which the Issuer agreed to purchase 2,500,000 common units representing limited partner interests in the Issuer (the "Common Units") from WGRAH at a price of $20.09 per Common Unit. WGRAH and the Issuer completed the sale of such Common Units on December 13, 2021. ( 2 )Following the transaction reported herein, Western Gas Resources, Inc. ("WGR") holds 161,319,520 Common Units, WGRAH holds 24,139,260 Common Units, APC Midstream Holdings, LLC ("APCMH") holds 457,849 Common Units and Anadarko USH1 Corporation ("Anadarko USH1") holds 14,364,949 Common Units. WGR also is the sole member of Western Midstream Holdings, LLC, the 2% economic general partner of the Issuer. ( 3 )OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding membership interests of Occidental Permian Manager LLC ("OPM") and 100% of the common stock of OXY Oil Partners, Inc. ("OOP"). OOP, OPM and OXY USA together own 100% of the membership interests of New OPL, LLC ("OPL"). OPL owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS"). ( 4 )Anadarko Petroleum Corporation ("APC") is a wholly owned subsidiary of BMS. APC owns (i) 100% of Anadarko Holding Company ("AHC") and (ii) indirectly, 100% of the common stock of WGR and Kerr-McGee Corporation ("KMG"). WGR is the sole member of APCMH, and APCMH is the sole member of WGRAH. KMG and AHC together own 100% of the common stock of Kerr-McGee Worldwide Corporation ("KMWW"), and APC and KMWW together indirectly own 100% of the common stock of Anadarko USH1. Accordingly, OXY USA, OPM, OOP, OPL, BMS, APC, AHC, WGR, Anadarko USH1, KMG, APCMH, WGRAH and KMWW are all direct or indirect wholly owned subsidiaries of Occidental.

Remarks: Due to the limitations of the U.S. Securities and Exchange Commission's electronic filing system, each of Occidental, OXY USA, OPM, OOP, OPL, BMS, APC and AHC are concurrently filing a Form 4 to report the transaction disclosed herein.

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).

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