As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Diamondback Energy, Inc. The largest reported stake is Greth Lyndal's, at 23.2%. 9 filings are on record since August 15, 2025 (Schedule 13D/A, September 17, 2026).
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Key facts
- · Reporting person: SGF FANG Holdings, LP · Sole voting: 0 · Shared voting: 64,957,047 · Sole dispositive: 0 · Shared dispositive: 64,957,047 · SCHEDULE 13D/A, 2026-09-17
- · Reporting person: Wellington Management Group LLP · Sole voting: 0 · Shared voting: 16,139,896 · Sole dispositive: 0 · Shared dispositive: 16,420,247 · SCHEDULE 13G, 2026-08-13
- · Holder: Greth Lyndal · Percent: 26.3% · SCHEDULE 13D/A
- · Holder: Vanguard Capital Management · Percent: 5.21% · SCHEDULE 13G
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
Diamondback Energy, Inc. has 9 Schedule 13D or 13G filings on record since 2025-08-15. 3 holders' latest filing reports 5% or more of common stock, par value $0.01 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 23.2% | 64,957,047 | SCHEDULE 13D/A, 2026-09-17 | 2026-09-16 | |
| Wellington Management Group LLP | 5.8% | 16,420,247 | SCHEDULE 13G, 2026-08-13 | 2026-06-30 |
| Vanguard Capital Management | 5.21% | 14,701,028 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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More on Diamondback Energy, Inc. and the records around it.
Diamondback Energy, Inc. elsewhere on the record
Companies that share a holder
- Wellington Management Group LLP also filed stake reports on 240 other companies: Hub Group, Inc. (Oct 2026), Latham Group, Inc. (Oct 2026), Redwood Trust, Inc. (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
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What the Full Report on Diamondback Energy, Inc. covers
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| SGF FANG Holdings, LP | 0 | 64,957,047 | 0 | 64,957,047 | SCHEDULE 13D/A, 2026-09-17 |
| Greth Lyndal | 0 | 64,957,047 | 0 | 64,957,047 | SCHEDULE 13D/A, 2026-09-17 |
| Wellington Management Group LLP | 0 | 16,139,896 | 0 | 16,420,247 | SCHEDULE 13G, 2026-08-13 |
| Wellington Group Holdings LLP | 0 | 16,139,896 | 0 | 16,420,247 | SCHEDULE 13G, 2026-08-13 |
| Wellington Investment Advisors Holdings LLP | 0 | 16,139,896 | 0 | 16,420,247 | SCHEDULE 13G, 2026-08-13 |
| Wellington Management Company LLP | 0 | 15,927,989 | 0 | 16,023,968 | SCHEDULE 13G, 2026-08-13 |
The latest filing identifies Diamondback Energy, Inc. by CUSIP 25278X109 and gives its principal executive office as 500 WEST TEXAS AVENUE, SUITE 100, MIDLAND, TX 79701 (SCHEDULE 13D/A, 2026-09-17).
Purpose of Transaction (Item 4)
Greth Lyndal
Item 4 is hereby amended and supplemented to add the following: On September 16, 2026, SGF FANG sold an aggregate of 9,079,675 shares of Common Stock at a price of $205.26 per share pursuant to Rule 144 under the Securities Act of 1933, as amended (the "September 16, 2026 Sale"). In connection with the September 16, 2026 Sale, SGF FANG is subject to a lock-up period from September 16, 2026 through the date 30 days after September 16, 2026, during which SGF FANG may not sell any shares of Common Stock without the mutual agreement of SGF FANG and Morgan Stanley & Co. LLC.Item 4 of the SCHEDULE 13D/A filed 2026-09-17
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-15 | Greth Lyndal | 35.1% | SCHEDULE 13D/A |
| 2025-12-02 | Greth Lyndal | 34.8% | SCHEDULE 13D/A |
| 2026-02-05 | Greth Lyndal | 34.1% | SCHEDULE 13D/A |
| 2026-03-16 | Greth Lyndal | 29.9% | SCHEDULE 13D/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Capital Management | 5.21% | SCHEDULE 13G |
| 2026-06-05 | Greth Lyndal | 26.3% | SCHEDULE 13D/A |
| 2026-08-13 | Wellington Management Group LLP | 5.8% | SCHEDULE 13G |
| 2026-09-17 | Greth Lyndal | 23.2% | SCHEDULE 13D/A |
Questions about who owns Diamondback Energy, Inc.
Who owns Diamondback Energy, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Diamondback Energy, Inc.: Greth Lyndal (23.2%, Schedule 13D/A, filed 2026-09-17), Wellington Management Group LLP (5.8%, Schedule 13G, filed 2026-08-13) and Vanguard Capital Management (5.21%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Diamondback Energy, Inc.?
By the share each holder's latest filing reports, the largest holders of Diamondback Energy, Inc. on this page are Greth Lyndal (23.2%), Wellington Management Group LLP (5.8%) and Vanguard Capital Management (5.21%).
When did Greth Lyndal buy into Diamondback Energy, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Greth Lyndal on this page is the Schedule 13D/A, filed 2025-08-15, reporting 35.1%; its latest, Schedule 13D/A filed 2026-09-17, reports 23.2%. 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%); 9 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.
Also on the record for Diamondback Energy, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 30, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 20, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
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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.