# EDGAR Filing Document

**Accession Number:** 0001824936
**File Stem:** 0001140361-26-003922
**Filing Date:** 2026-2
**Character Count:** 16177
**Document Hash:** eae0fb10cf030d38f8a76031e953f4cc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-003922.hdr.sgml**: 20260205

**ACCESSION NUMBER**: 0001140361-26-003922

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260203

**FILED AS OF DATE**: 20260205

**DATE AS OF CHANGE**: 20260205

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** OCCIDENTAL PETROLEUM CORP /DE/
- **CENTRAL INDEX KEY:** 0000797468
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35753
- **FILM NUMBER:** 26604297

**BUSINESS ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA
- **STREET 2:** SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 7132157000

**MAIL ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA
- **STREET 2:** SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** WESTERN GAS RESOURCES INC
- **CENTRAL INDEX KEY:** 0000856716
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS DISTRIBUTION [4924]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35753
- **FILM NUMBER:** 26604296

**BUSINESS ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 713-215-7000

**MAIL ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KERR MCGEE CORP /DE
- **CENTRAL INDEX KEY:** 0001141185
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35753
- **FILM NUMBER:** 26604292

**BUSINESS ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 713-215-7000

**MAIL ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046

**FORMER NAME:**
- **FORMER CONFORMED NAME:** KERR MCGEE HOLDCO INC
- **DATE OF NAME CHANGE:** 20010525

**FORMER NAME:**
- **FORMER CONFORMED NAME:** KING HOLDCO INC
- **DATE OF NAME CHANGE:** 20010523
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Anadarko USH1 Corp
- **CENTRAL INDEX KEY:** 0001824936

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35753
- **FILM NUMBER:** 26604293

**BUSINESS ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 713-215-7000

**MAIL ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** APC Midstream Holdings, LLC
- **CENTRAL INDEX KEY:** 0001601306

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35753
- **FILM NUMBER:** 26604295

**BUSINESS ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 713-215-7000

**MAIL ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Kerr-McGee Worldwide Corp
- **CENTRAL INDEX KEY:** 0001699285

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35753
- **FILM NUMBER:** 26604294

**BUSINESS ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA
- **STREET 2:** SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 713-215-7000

**MAIL ADDRESS:**
- **STREET 1:** 5 GREENWAY PLAZA
- **STREET 2:** SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Western Midstream Partners, LP
- **CENTRAL INDEX KEY:** 0001423902
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS TRANSMISSION [4922]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 261075656
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 9950 WOODLOCH FOREST DRIVE, SUITE 2800
- **CITY:** THE WOODLANDS
- **STATE:** TX
- **ZIP:** 77380-7046
- **BUSINESS PHONE:** 346-786-5000

**MAIL ADDRESS:**
- **STREET 1:** 9950 WOODLOCH FOREST DRIVE, SUITE 2800
- **CITY:** THE WOODLANDS
- **STATE:** TX
- **ZIP:** 77380-7046

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Western Gas Equity Partners, LP
- **DATE OF NAME CHANGE:** 20121023

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WGR Holdings LLC
- **DATE OF NAME CHANGE:** 20080115

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>OCCIDENTAL PETROLEUM CORP /DE/<br><sub>(Last) (First) (Middle)</sub><br>5 GREENWAY PLAZA<br>SUITE 110<br><sub>(Street)</sub><br>HOUSTON, TX 77046<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Western Midstream Partners, LP [ WES ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>WESTERN GAS RESOURCES INC<br><sub>(Last) (First) (Middle)</sub><br>1099 18TH STREET, SUITE 1200<br><sub>(Street)</sub><br>DENVER, CO 80202-1955<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Western Midstream Partners, LP [ WES ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>APC Midstream Holdings, LLC<br><sub>(Last) (First) (Middle)</sub><br>5 GREENWAY PLAZA<br>SUITE 110<br><sub>(Street)</sub><br>HOUSTON, TX 77046<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Western Midstream Partners, LP [ WES ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Kerr-McGee Worldwide Corp<br><sub>(Last) (First) (Middle)</sub><br>5 GREENWAY PLAZA<br>SUITE 110<br><sub>(Street)</sub><br>HOUSTON, TX 77046<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Western Midstream Partners, LP [ WES ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Anadarko USH1 Corp<br><sub>(Last) (First) (Middle)</sub><br>5 GREENWAY PLAZA<br>SUITE 110<br><sub>(Street)</sub><br>HOUSTON, TX 77046<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Western Midstream Partners, LP [ WES ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KERR MCGEE CORP /DE<br><sub>(Last) (First) (Middle)</sub><br>5 GREENWAY PLAZA<br>SUITE 110<br><sub>(Street)</sub><br>HOUSTON, TX 77046<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Western Midstream Partners, LP [ WES ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| COMMON UNITS (LIMITED PARTNER INTERESTS) | 2026-02-03 |  | J<sup>(1)</sup> |  | 15307402 | D | <sup>(1)</sup> | 150374176 | I | See Footnotes<sup>(2)(3)(4)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) 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.

(2) 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.

(3) 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").

(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 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.

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

**Signature:** /s/ Nicole E. Clark of Western Gas Resources, Inc.  
**Date:** 2026-02-05

**Signature:** /s/ Nicole E. Clark of APC Midstream Holdings, LLC  
**Date:** 2026-02-05

**Signature:** /s/ Nicole E. Clark of Kerr-McGee Worldwide Corporation  
**Date:** 2026-02-05

**Signature:** /s/ Nicole E. Clark of Anadarko USH1 Corporation  
**Date:** 2026-02-05

**Signature:** /s/ Nicole E. Clark of Kerr-McGee Corporation  
**Date:** 2026-02-05

### Remarks:

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 copies 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.**