OCCIDENTAL PETROLEUM CORP /DE/ - 03 Feb 2026 SCHEDULE 13D/A Report for Western Midstream Partners, LP Common Units Representing Limited Partner Interests (WES)

Filing manager
OCCIDENTAL PETROLEUM CORP /DE/
Reporting owner
Occidental Petroleum Corporation
Security
Western Midstream Partners, LP Common Units Representing Limited Partner Interests
Beneficially owned shares
150,374,176 shares
Ownership signal CIK-linked ownership evidence from parsed SEC filings. 2 signals
Large-stake signal

Form

SCHEDULE 13D/A

Active or control-oriented beneficial ownership filing.

Ownership

38%

Beneficial ownership of this reported class.

Shares

150,374,176 shares

Shares beneficially owned as disclosed.

Event date

03 Feb 2026

Date tied to the ownership event or amendment.

Accepted by SEC

05 Feb 2026

EDGAR acceptance date.

How to read this large-stake filing
  • Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
  • Compare this filing with the holder history and issuer page before treating the percentage as a current position.
  • Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership
38%
Subject security Names, identifiers, and filing context for this profile. 2 source fields
Symbol
WES
Shares outstanding
392,621,869 shares
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
SCHEDULE 13D/A
Accepted by SEC
05 Feb 2026, 17:30:07 UTC
Event date
03 Feb 2026
Prior SEC filing
21 Jan 2026
Source filing
View source filing

Key filing fact

OCCIDENTAL PETROLEUM CORP /DE/ disclosed 38% ownership in Western Midstream Partners, LP Common Units Representing Limited Partner Interests (WES) on 03 Feb 2026.

Key facts

  • OCCIDENTAL PETROLEUM CORP /DE/ filed SCHEDULE 13D/A for Western Midstream Partners, LP Common Units Representing Limited Partner Interests (WES).
  • Disclosed ownership: 38%.
  • Date of event: 03 Feb 2026.

Change

  • Previous schedule filing date: 21 Jan 2026.
  • Current filing was accepted on 05 Feb 2026, 17:30.

Research use

  • This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
  • Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

View source filing

Reporting persons

Disclosed reporting parties (11)

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name Ownership Shares owned Sole voting power Shared voting power Signature Title CIK
Occidental Petroleum Corporation 38% 150,374,176 0 150,374,176 /s/ Nicole E. Clark Nicole E. Clark, Vice President, Corporate Secretary and Chief Compliance Officer 0000797468
OXY USA Inc. 38% 150,374,176 0 150,374,176 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
OXY Oil Partners, Inc. 38% 150,374,176 0 150,374,176 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Baseball Merger Sub 2, Inc. 38% 150,374,176 0 150,374,176 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Anadarko Petroleum Corporation 38% 150,374,176 0 150,374,176 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Western Gas Resources, Inc. 36% 141,369,967 0 141,369,967 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
APC Midstream Holdings, LLC 0.1% 457,849 0 457,849 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Anadarko Holding Company 2.3% 9,004,209 0 9,004,209 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Kerr-McGee Corporation 2.3% 9,004,209 0 9,004,209 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Kerr-McGee Worldwide Corporation 2.3% 9,004,209 0 9,004,209 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
Anadarko USH1 Corporation 2.3% 9,004,209 0 9,004,209 /s/ Nicole E. Clark Nicole E. Clark, Vice President and Secretary
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