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ANADARKO HOLDING Co

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67648
SEC CIK
0001570992

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Reported relationships

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CompanyLast reported asReport datePublished
Western Midstream Partners, LPWES · Entity 325810% ownerFebruary 03, 2026February 05, 2026

Disclosed balances

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Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Western Midstream Partners, LP

Report date February 03, 2026 · Filed February 05, 2026

Jointly reported with OCCIDENTAL PETROLEUM CORP /DE/, OXY USA INC, OXY Oil Partners, Inc., Baseball Merger Sub 2, Inc., ANADARKO PETROLEUM CORP

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
COMMON UNITS (LIMITED PARTNER INTERESTS)SEC Table I · non-derivativeIndirectSee Footnotes150,374,176 Reported balance After 2026-02-03 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2026-02-03 · Other · Disposed 15,307,402 · Balance 150,374,176

F1: On January 16, 2026, Western Gas Resources, Inc. ("WGRI") entered into a Unit Redemption Agreement with the Issuer and the other parties thereto, pursuant to which WGRI transferred and surrendered on February 3, 2026 an aggregate of 15,307,402 common units representing limited partner interests in the Issuer (the "Common Units") to the Issuer in connection with certain amendments to existing operating agreements, as described in the Unit Redemption Agreement.

F2: Following the transaction reported herein, WGRI holds 140,912,118 Common Units, APC Midstream Holdings, LLC ("APCMH") holds 457,849 Common Units and Anadarko USH1 Corporation ("AUSHI") holds 9,004,209 Common Units. WGRI also is the sole member of Western Midstream Holdings, LLC, the 2% economic general partner of the Issuer.

F3: OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding common stock of OXY Oil Partners, Inc. ("OOP"). OOP owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS").

F4: 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 WGRI and Kerr-McGee Corporation ("KMG"). WGRI is the sole member of APCMH. 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 AUSH1. Accordingly, OXY USA, OOP, BMS, APC, AHC, WGRI, AUSH1, KMG, APCMH and KMWW are all direct or indirect wholly owned subsidiaries of Occidental.

Filing footnotes · ownership attribution and instrument terms

F1: On January 16, 2026, Western Gas Resources, Inc. ("WGRI") entered into a Unit Redemption Agreement with the Issuer and the other parties thereto, pursuant to which WGRI transferred and surrendered on February 3, 2026 an aggregate of 15,307,402 common units representing limited partner interests in the Issuer (the "Common Units") to the Issuer in connection with certain amendments to existing operating agreements, as described in the Unit Redemption Agreement.

F2: Following the transaction reported herein, WGRI holds 140,912,118 Common Units, APC Midstream Holdings, LLC ("APCMH") holds 457,849 Common Units and Anadarko USH1 Corporation ("AUSHI") holds 9,004,209 Common Units. WGRI also is the sole member of Western Midstream Holdings, LLC, the 2% economic general partner of the Issuer.

F3: OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding common stock of OXY Oil Partners, Inc. ("OOP"). OOP owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS").

F4: 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 WGRI and Kerr-McGee Corporation ("KMG"). WGRI is the sole member of APCMH. 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 AUSH1. Accordingly, OXY USA, OOP, BMS, APC, AHC, WGRI, AUSH1, KMG, APCMH and KMWW are all direct or indirect wholly owned subsidiaries of Occidental.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
February 03, 2026 Filed Feb 5, 2026 17:34 UTC Western Midstream Partners, LP WES · Entity 3258 OtherCOMMON UNITS (LIMITED PARTNER INTERESTS) 15,307,402 Not disclosed Not disclosed
Disclosure

SEC source: 0001140361-26-003924 · form4.xml · nonDerivative · entry 1

OCCIDENTAL PETROLEUM CORP /DE/ · CIK 0000797468 · 10% owner

OXY USA INC · CIK 0000728399 · 10% owner

OXY Oil Partners, Inc. · CIK 0001785615 · 10% owner

Baseball Merger Sub 2, Inc. · CIK 0001785593 · 10% owner

ANADARKO PETROLEUM CORP · CIK 0000773910 · 10% owner

ANADARKO HOLDING Co · CIK 0001570992 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 150,374,176

F1 · kind: On January 16, 2026, Western Gas Resources, Inc. ("WGRI") entered into a Unit Redemption Agreement with the Issuer and the other parties thereto, pursuant to which WGRI transferred and surrendered on February 3, 2026 an aggregate of 15,307,402 common units representing limited partner interests in the Issuer (the "Common Units") to the Issuer in connection with certain amendments to existing operating agreements, as described in the Unit Redemption Agreement.

F1 · price: On January 16, 2026, Western Gas Resources, Inc. ("WGRI") entered into a Unit Redemption Agreement with the Issuer and the other parties thereto, pursuant to which WGRI transferred and surrendered on February 3, 2026 an aggregate of 15,307,402 common units representing limited partner interests in the Issuer (the "Common Units") to the Issuer in connection with certain amendments to existing operating agreements, as described in the Unit Redemption Agreement.

F2 · ownership.nature: Following the transaction reported herein, WGRI holds 140,912,118 Common Units, APC Midstream Holdings, LLC ("APCMH") holds 457,849 Common Units and Anadarko USH1 Corporation ("AUSHI") holds 9,004,209 Common Units. WGRI also is the sole member of Western Midstream Holdings, LLC, the 2% economic general partner of the Issuer.

F3 · ownership.nature: OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding common stock of OXY Oil Partners, Inc. ("OOP"). OOP owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS").

F4 · ownership.nature: 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 WGRI and Kerr-McGee Corporation ("KMG"). WGRI is the sole member of APCMH. 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 AUSH1. Accordingly, OXY USA, OOP, BMS, APC, AHC, WGRI, AUSH1, KMG, APCMH and KMWW are all direct or indirect wholly owned subsidiaries of Occidental.

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August 14, 2024 Filed Aug 16, 2024 17:11 UTC Western Midstream Partners, LP WES · Entity 3258 SaleCOMMON UNITS (LIMITED PARTNER INTERESTS) 19,500,000 $35.75 $697,125,000.00
Disclosure

SEC source: 0000797468-24-000146 · wk-form4_1723842705.xml · nonDerivative · entry 1

OCCIDENTAL PETROLEUM CORP /DE/ · CIK 0000797468 · 10% owner

OXY USA INC · CIK 0000728399 · 10% owner

OXY Oil Partners, Inc. · CIK 0001785615 · 10% owner

Baseball Merger Sub 2, Inc. · CIK 0001785593 · 10% owner

ANADARKO PETROLEUM CORP · CIK 0000773910 · 10% owner

ANADARKO HOLDING Co · CIK 0001570992 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 165,681,578

F1 · kind: On August 14, 2024, WGR Asset Holding Company LLC ("WGRAH") and Anadarko USH1 Corporation ("AUSH1") sold 14,139,260 and 5,360,740 common units representing limited partner interests in the Issuer (the "Common Units"), respectively, in an underwritten public offering at a price of $35.75 per Common Unit.

F1 · price: On August 14, 2024, WGR Asset Holding Company LLC ("WGRAH") and Anadarko USH1 Corporation ("AUSH1") sold 14,139,260 and 5,360,740 common units representing limited partner interests in the Issuer (the "Common Units"), respectively, in an underwritten public offering at a price of $35.75 per Common Unit.

F2 · ownership.nature: Following the transaction reported herein, Western Gas Resources, Inc. ("WGRI") holds 156,219,520 Common Units, APC Midstream Holdings, LLC ("APCMH") holds 457,849 Common Units and AUSHI holds 9,004,209 Common Units. WGRI also is the sole member of Western Midstream Holdings, LLC, the 2% economic general partner of the Issuer.

F3 · ownership.nature: OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding common stock of OXY Oil Partners, Inc. ("OOP"). OOP owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS").

F4 · ownership.nature: 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 WGRI and Kerr-McGee Corporation ("KMG"). WGRI is the sole member of APCMH. 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 AUSH1. Accordingly, OXY USA, OOP, BMS, APC, AHC, WGRI, AUSH1, KMG, APCMH, KMWW and WGRAH are all direct or indirect wholly owned subsidiaries of Occidental.

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September 12, 2023 Filed Sep 14, 2023 17:54 UTC Western Midstream Partners, LP WES · Entity 3258 SaleCOMMON UNITS (LIMITED PARTNER INTERESTS) 5,100,000 $25.00 $127,500,000.00
Disclosure

SEC source: 0001140361-23-044014 · form4.xml · nonDerivative · entry 1

OCCIDENTAL PETROLEUM CORP /DE/ · CIK 0000797468 · 10% owner

OXY USA INC · CIK 0000728399 · 10% owner

OXY Oil Partners, Inc. · CIK 0001785615 · 10% owner

Baseball Merger Sub 2, Inc. · CIK 0001785593 · 10% owner

ANADARKO PETROLEUM CORP · CIK 0000773910 · 10% owner

ANADARKO HOLDING Co · CIK 0001570992 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 185,181,578

F1 · kind: On September 7, 2023, Western Midstream Partners, LP (the "Issuer") entered into a unit purchase agreement with Western Gas Resources, Inc. ("WGRI") pursuant to which the Issuer agreed to purchase 5,100,000 common units representing limited partner interests in the Issuer (the "Common Units") from WGRI at a price of $25.00 per Common Unit. WGRI and the Issuer completed the sale of such Common Units on September 12, 2023.

F1 · price: On September 7, 2023, Western Midstream Partners, LP (the "Issuer") entered into a unit purchase agreement with Western Gas Resources, Inc. ("WGRI") pursuant to which the Issuer agreed to purchase 5,100,000 common units representing limited partner interests in the Issuer (the "Common Units") from WGRI at a price of $25.00 per Common Unit. WGRI and the Issuer completed the sale of such Common Units on September 12, 2023.

F2 · ownership.nature: Following the transaction reported herein, WGRI holds 156,219,520 Common Units, WGR Asset Holding Company LLC ("WGRAH") holds 14,139,260 Common Units, APC Midstream Holdings, LLC ("APCMH") holds 457,849 Common Units and Anadarko USH1 Corporation ("Anadarko USH1") holds 14,364,949 Common Units. WGRI also is the sole member of Western Midstream Holdings, LLC, the 2% economic general partner of the Issuer.

F3 · ownership.nature: OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding common stock of OXY Oil Partners, Inc. ("OOP"). OOP owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS").

F4 · ownership.nature: 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 WGRI and Kerr-McGee Corporation ("KMG"). WGRI 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, OOP, BMS, APC, AHC, WGRI, Anadarko USH1, KMG, APCMH, WGRAH and KMWW are all direct or indirect wholly owned subsidiaries of Occidental.

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July 21, 2022 Filed Jul 25, 2022 20:45 UTC Western Midstream Partners, LP WES · Entity 3258 SaleCOMMON UNITS (LIMITED PARTNER INTERESTS) 10,000,000 $25.25 $252,500,000.00
Disclosure

SEC source: 0001140361-22-026895 · form4.xml · nonDerivative · entry 1

OCCIDENTAL PETROLEUM CORP /DE/ · CIK 0000797468 · 10% owner

OXY USA INC · CIK 0000728399 · 10% owner

OXY Oil Partners, Inc. · CIK 0001785615 · 10% owner

Baseball Merger Sub 2, Inc. · CIK 0001785593 · 10% owner

ANADARKO PETROLEUM CORP · CIK 0000773910 · 10% owner

ANADARKO HOLDING Co · CIK 0001570992 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 190,281,578

F1 · kind: On July 17, 2022, Western Midstream Partners, LP (the "Issuer") entered into a unit purchase agreement with WGR Asset Holding Company LLC ("WGRAH") pursuant to which the Issuer agreed to purchase 10,000,000 common units representing limited partner interests in the Issuer (the "Common Units") from WGRAH at a price of $25.25 per Common Unit. WGRAH and the Issuer completed the sale of such Common Units on July 21, 2022.

F1 · price: On July 17, 2022, Western Midstream Partners, LP (the "Issuer") entered into a unit purchase agreement with WGR Asset Holding Company LLC ("WGRAH") pursuant to which the Issuer agreed to purchase 10,000,000 common units representing limited partner interests in the Issuer (the "Common Units") from WGRAH at a price of $25.25 per Common Unit. WGRAH and the Issuer completed the sale of such Common Units on July 21, 2022.

F2 · ownership.nature: Following the transaction reported herein, Western Gas Resources, Inc. ("WGR") holds 161,319,520 Common Units, WGRAH holds 14,139,260 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.

F3 · ownership.nature: OXY USA Inc. ("OXY USA") is a wholly owned subsidiary of Occidental Petroleum Corporation ("Occidental"). OXY USA owns 100% of the outstanding common stock of OXY Oil Partners, Inc. ("OOP"). OOP owns 100% of the outstanding common stock of Baseball Merger Sub 2, Inc. ("BMS").

F4 · ownership.nature: 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, OOP, BMS, APC, AHC, WGR, Anadarko USH1, KMG, APCMH, WGRAH and KMWW are all direct or indirect wholly owned subsidiaries of Occidental.

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December 13, 2021 Filed Dec 15, 2021 21:28 UTC Western Midstream Partners, LP WES · Entity 3258 SaleCOMMON UNITS (LIMITED PARTNER INTERESTS) 2,500,000 $20.09 $50,225,000.00
Disclosure

SEC source: 0001140361-21-041953 · form4.xml · nonDerivative · entry 1

OCCIDENTAL PETROLEUM CORP /DE/ · CIK 0000797468 · 10% owner

OXY USA INC · CIK 0000728399 · 10% owner

Occidental Permian Manager LLC · CIK 0001785602 · 10% owner

Baseball Merger Sub 2, Inc. · CIK 0001785593 · 10% owner

ANADARKO PETROLEUM CORP · CIK 0000773910 · 10% owner

OXY Oil Partners, Inc. · CIK 0001785615 · 10% owner

ANADARKO HOLDING Co · CIK 0001570992 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 200,281,578

F1 · kind: 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.

F1 · price: 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.

F2 · ownership.nature: 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.

F3 · ownership.nature: 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").

F4 · ownership.nature: 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.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.