As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Western Midstream Partners LP. The largest reported stake is Occidental Petroleum Corporation's, at 38.3%. 8 filings are on record since July 9, 2025 (Schedule 13D/A, February 5, 2026).
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Key facts
- · Reporting person: ALPS Advisors, Inc. · Sole voting: 0 · Shared voting: 37,364,470 · Sole dispositive: 0 · Shared dispositive: 37,364,470 · SCHEDULE 13G/A, 2026-10-07
- · Holder: ALPS Advisors, Inc. · Percent: 8.87% · SCHEDULE 13G/A
- · Holder: ALPS Advisors, Inc. · Percent: 9.82% · SCHEDULE 13G/A
- · Reporting person: Occidental Petroleum Corporation · Sole voting: 0 · Shared voting: 150,374,176 · Sole dispositive: 0 · Shared dispositive: 150,374,176 · SCHEDULE 13D/A, 2026-02-05
- · Holder: Occidental Petroleum Corporation · Percent: 40.6% · SCHEDULE 13D/A
Western Midstream Partners LP has 8 Schedule 13D or 13G filings on record since 2025-07-09. 2 holders' latest filing reports 5% or more of common units representing limited partner interests. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Occidental Petroleum Corporation | 38.3% | 150,374,176 | SCHEDULE 13D/A, 2026-02-05 | 2026-02-03 |
| ALPS Advisors, Inc. | 9.04% | 37,364,470 | SCHEDULE 13G/A, 2026-10-07 | 2026-09-30 |
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More on Western Midstream Partners LP and the records around it.
Western Midstream Partners LP elsewhere on the record
Companies that share a holder
- ALPS Advisors, Inc. also filed stake reports on 9 other companies: Delek Logistics Partners LP (Oct 2026), Genesis Energy LP (Oct 2026), Global Partners LP (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Occidental Petroleum Corporation | 0 | 150,374,176 | 0 | 150,374,176 | SCHEDULE 13D/A, 2026-02-05 |
| OXY USA Inc. | 0 | 150,374,176 | 0 | 150,374,176 | SCHEDULE 13D/A, 2026-02-05 |
| OXY Oil Partners, Inc. | 0 | 150,374,176 | 0 | 150,374,176 | SCHEDULE 13D/A, 2026-02-05 |
| Baseball Merger Sub 2, Inc. | 0 | 150,374,176 | 0 | 150,374,176 | SCHEDULE 13D/A, 2026-02-05 |
| Anadarko Petroleum Corporation | 0 | 150,374,176 | 0 | 150,374,176 | SCHEDULE 13D/A, 2026-02-05 |
| Western Gas Resources, Inc. | 0 | 141,369,967 | 0 | 141,369,967 | SCHEDULE 13D/A, 2026-02-05 |
| APC Midstream Holdings, LLC | 0 | 457,849 | 0 | 457,849 | SCHEDULE 13D/A, 2026-02-05 |
| Anadarko Holding Company | 0 | 9,004,209 | 0 | 9,004,209 | SCHEDULE 13D/A, 2026-02-05 |
| Kerr-McGee Corporation | 0 | 9,004,209 | 0 | 9,004,209 | SCHEDULE 13D/A, 2026-02-05 |
| Kerr-McGee Worldwide Corporation | 0 | 9,004,209 | 0 | 9,004,209 | SCHEDULE 13D/A, 2026-02-05 |
| Anadarko USH1 Corporation | 0 | 9,004,209 | 0 | 9,004,209 | SCHEDULE 13D/A, 2026-02-05 |
| ALPS Advisors, Inc. | 0 | 37,364,470 | 0 | 37,364,470 | SCHEDULE 13G/A, 2026-10-07 |
| Alerian MLP ETF | 0 | 36,947,122 | 0 | 36,947,122 | SCHEDULE 13G/A, 2026-10-07 |
The latest filing identifies Western Midstream Partners LP by CUSIP 958669103 and gives its principal executive office as 9950 Woodloch Forest Drive, Suite 2800, The Woodlands, TX 77380-7046 (SCHEDULE 13G/A, 2026-10-07).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-09 | ALPS Advisors, Inc. | 9.11% | SCHEDULE 13G/A |
| 2025-10-07 | ALPS Advisors, Inc. | 9.14% | SCHEDULE 13G/A |
| 2026-01-06 | ALPS Advisors, Inc. | 8.6% | SCHEDULE 13G/A |
| 2026-01-21 | Occidental Petroleum Corporation | 40.6% | SCHEDULE 13D/A |
| 2026-02-05 | Occidental Petroleum Corporation | 38.3% | SCHEDULE 13D/A |
| 2026-04-08 | ALPS Advisors, Inc. | 9.82% | SCHEDULE 13G/A |
| 2026-07-09 | ALPS Advisors, Inc. | 8.87% | SCHEDULE 13G/A |
| 2026-10-07 | ALPS Advisors, Inc. | 9.04% | SCHEDULE 13G/A |
Questions about who owns Western Midstream Partners LP
Who owns Western Midstream Partners LP?
On this page, 2 holders' latest ownership filings report 5% or more of Western Midstream Partners LP: Occidental Petroleum Corporation (38.3%, Schedule 13D/A, filed 2026-02-05) and ALPS Advisors, Inc. (9.04%, Schedule 13G/A, filed 2026-10-07).
Who are the largest shareholders of Western Midstream Partners LP?
By the share each holder's latest filing reports, the largest holders of Western Midstream Partners LP on this page are Occidental Petroleum Corporation (38.3%) and ALPS Advisors, Inc. (9.04%).
When did Occidental Petroleum Corporation buy into Western Midstream Partners LP?
The filings give report dates, not purchase dates. The earliest filing from Occidental Petroleum Corporation on this page is the Schedule 13D/A, filed 2026-01-21, reporting 40.6%; its latest, Schedule 13D/A filed 2026-02-05, reports 38.3%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 8 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.