As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Six Flags Entertainment Corporation. The largest reported stake is BlackRock, Inc.'s, at 14.4%. 10 filings are on record since August 14, 2025 (Schedule 13G/A, July 30, 2026).
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Key facts
- · Reporting person: Darlington Partners Capital Management, LP · Sole voting: 0 · Shared voting: 7,700,000 · Sole dispositive: 0 · Shared dispositive: 7,700,000 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: BlackRock, Inc. · Sole voting: 14,541,453 · Shared voting: 0 · Sole dispositive: 14,734,649 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-30
- · Holder: Darlington Partners Capital Management, LP · Percent: 8.5% · SCHEDULE 13G/A
- · Reporting person: Morgan Stanley · Sole voting: 0 · Shared voting: 5,447,918 · Sole dispositive: 0 · Shared dispositive: 5,514,103 · SCHEDULE 13G/A, 2026-05-12
- · Holder: Vanguard Portfolio Management · Percent: 5.11% · SCHEDULE 13G
Six Flags Entertainment Corporation has 10 Schedule 13D or 13G filings on record since 2025-08-14. 4 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| BlackRock, Inc. | 14.4% | 14,734,649 | SCHEDULE 13G/A, 2026-07-30 | 2026-06-30 |
| Darlington Partners Capital Management, LP | 7.5% | 7,700,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| 5.4% | 5,514,103 | SCHEDULE 13G/A, 2026-05-12 | 2026-03-31 | |
| Vanguard Portfolio Management | 5.11% | 5,214,914 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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Keep reading
More on Six Flags Entertainment Corporation and the records around it.
Six Flags Entertainment Corporation elsewhere on the record
- Leadership changes Jul 2026
- Who owns it
Companies that share a holder
- Darlington Partners Capital Management, LP also filed stake reports on 4 other companies: OneStream, Inc. (May 2026), Shift4 Payments, Inc. (May 2026), Warner Music Group Corp. (Apr 2026)
- Morgan Stanley also filed stake reports on 182 other companies: MDA Space Ltd. (Nov 2026), RiverNorth/DoubleLine Strategic Opportunity Fund, Inc. (Oct 2026), Arbutus Biopharma Corp (Oct 2026)
- Vanguard Portfolio Management also filed stake reports on 941 other companies: Newmark Group Inc (Nov 2026), A10 Networks Inc (Oct 2026), ADT Inc (Oct 2026)
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The Short Answer
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| BlackRock, Inc. | 14,541,453 | 0 | 14,734,649 | 0 | SCHEDULE 13G/A, 2026-07-30 |
| Darlington Partners Capital Management, LP | 0 | 7,700,000 | 0 | 7,700,000 | SCHEDULE 13G/A, 2026-08-14 |
| Darlington Partners GP, LLC | 0 | 7,700,000 | 0 | 7,700,000 | SCHEDULE 13G/A, 2026-08-14 |
| Darlington Partners, L.P. | 0 | 7,700,000 | 0 | 7,700,000 | SCHEDULE 13G/A, 2026-08-14 |
| Scott W. Clark | 0 | 7,700,000 | 0 | 7,700,000 | SCHEDULE 13G/A, 2026-08-14 |
| Ramsey B. Jishi | 0 | 7,700,000 | 0 | 7,700,000 | SCHEDULE 13G/A, 2026-08-14 |
| Morgan Stanley | 0 | 5,447,918 | 0 | 5,514,103 | SCHEDULE 13G/A, 2026-05-12 |
| Morgan Stanley Capital Services LLC | 0 | 5,371,530 | 0 | 5,371,530 | SCHEDULE 13G/A, 2026-05-12 |
The latest filing identifies Six Flags Entertainment Corporation by CUSIP 83001C108 and gives its principal executive office as 8701 RED OAK BLVD., CHARLOTTE, NC 28217 (SCHEDULE 13G/A, 2026-08-14).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | Darlington Partners Capital Management, LP | 8.6% | SCHEDULE 13G/A |
| 2025-11-07 | Morgan Stanley | 5.6% | SCHEDULE 13G |
| 2026-02-12 | Morgan Stanley | 9.1% | SCHEDULE 13G/A |
| 2026-02-13 | Darlington Partners Capital Management, LP | 5.1% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Portfolio Management | 5.11% | SCHEDULE 13G |
| 2026-05-12 | Morgan Stanley | 5.4% | SCHEDULE 13G/A |
| 2026-05-15 | Darlington Partners Capital Management, LP | 8.5% | SCHEDULE 13G/A |
| 2026-07-30 | BlackRock, Inc. | 14.4% | SCHEDULE 13G/A |
| 2026-08-14 | Darlington Partners Capital Management, LP | 7.5% | SCHEDULE 13G/A |
Questions about who owns Six Flags Entertainment Corporation
Who owns Six Flags Entertainment Corporation?
On this page, 4 holders' latest ownership filings report 5% or more of Six Flags Entertainment Corporation: BlackRock, Inc. (14.4%, Schedule 13G/A, filed 2026-07-30), Darlington Partners Capital Management, LP (7.5%, Schedule 13G/A, filed 2026-08-14), Morgan Stanley (5.4%, Schedule 13G/A, filed 2026-05-12) and Vanguard Portfolio Management (5.11%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Six Flags Entertainment Corporation?
By the share each holder's latest filing reports, the largest holders of Six Flags Entertainment Corporation on this page are BlackRock, Inc. (14.4%), Darlington Partners Capital Management, LP (7.5%) and Morgan Stanley (5.4%).
When did BlackRock, Inc. buy into Six Flags Entertainment Corporation?
The filings give report dates, not purchase dates. The earliest filing from BlackRock, Inc. on this page is the Schedule 13G/A, filed 2026-07-30, reporting 14.4%. 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%); 10 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 Six Flags Entertainment Corporation
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| July 2, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 27, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 7, 2026 | Leadership change: David Hoffman appointed, Chief Financial Officer | — | 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.