- 03 Feb 2026 Form 4 Insider Report for Western Midstream Partners, LP (WES)

Reporting relationship: 10%+ Owner
Issuer ticker: WES
Reported as of: 03 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Feb 2026, 17:34:29 UTC
Prior SEC filing: 16 Aug 2024
Source filing: View source filing
Reporting owner signature: /s/ Nicole E. Clark of OXY USA Inc.

Key filing fact

OCCIDENTAL PETROLEUM CORP /DE/ filed Form 4 for Western Midstream Partners, LP (WES) on 05 Feb 2026.

Key facts

This page summarizes OCCIDENTAL PETROLEUM CORP /DE/'s Form 4 filing for Western Midstream Partners, LP (WES).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Feb 2026, 17:34.

Change

Previous filing in this sequence was filed on 16 Aug 2024.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (6)

CIK 0000797468 Primary reporting owner

OCCIDENTAL PETROLEUM CORP /DE/

Relationship: 10%+ Owner
Address: 5 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Nicole E. Clark of OXY USA Inc.
Signature date: 05 Feb 2026

CIK 0000728399

OXY USA INC

Relationship: 10%+ Owner
Address: 5 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Nicole E. Clark of OXY Oil Partners, Inc.
Signature date: 05 Feb 2026

CIK 0001785615

OXY Oil Partners, Inc.

Relationship: 10%+ Owner
Address: 5 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Nicole E. Clark of Baseball Merger Sub 2, Inc.
Signature date: 05 Feb 2026

CIK 0001785593

Baseball Merger Sub 2, Inc.

Relationship: 10%+ Owner
Address: 5 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Nicole E. Clark of Anadarko Petroleum Corporation
Signature date: 05 Feb 2026

CIK 0000773910

ANADARKO PETROLEUM CORP

Relationship: 10%+ Owner
Address: 5 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Nicole E. Clark of Anadarko Holding Company
Signature date: 05 Feb 2026

CIK 0001570992

ANADARKO HOLDING Co

Relationship: 10%+ Owner
Address: 5 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Nicole E. Clark of Occidental Petroleum Corporation
Signature date: 05 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WES transaction

COMMON UNITS (LIMITED PARTNER INTERESTS)

Other

Transaction value
Shares: -15,307,402
Change %: -9.2%
Price
Shares after: 150,374,176
Date: 03 Feb 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote 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.

Footnote 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.

Footnote 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").

Footnote 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.

SEC remarks

Due to the limitations of the U.S. Securities and Exchange Commission's electronic filing system, each of WGRI, Anadarko USH1, KMG, APCMH, and KMWW are concurrently filing a Form 4 to report the transaction disclosed herein.