Six Flags Entertainment Corporation
FUN- Exchange
- NYSE
- Industry
- Services-Amusement & Recreation Services
- SEC CIK
- 0001999001
In the last 90 days, Six Flags Entertainment Corporation insiders filed 3 open-market purchases and 0 sales; 314 institutions reported holding it in 13F filings for Q2 2026, worth $2.32B in total; no superinvestor holds it.
Holders of 5% or more of FUN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Six Flags Entertainment Corporation, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 14.40%14.7M shares | – | Jul 30, 20261 filing | Jul 30, 2026 | SEC |
| Darlington Partners Capital Management, LP | 13G/A | 7.50%7.70M shares | −1.00 ppfrom 8.50% | Mar 11, 20256 filings | Aug 14, 2026 | SEC |
| Morgan Stanley | 13G/A | 5.40%5.51M shares | −3.70 ppfrom 9.10% | Nov 7, 20253 filings | May 12, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.11%5.21M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
37 Schedule 13D and 13G filings on Six Flags Entertainment Corporation, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 202612:40 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G/A | 7.50%7.70M shares | −1.00 ppfrom 8.50% | Jun 30, 2026 | SEC |
| Jul 30, 20261:55 PM ET | BlackRock, Inc. | 13G/A | 14.40%14.7M shares | – | Jun 30, 2026 | SEC |
| May 15, 20264:30 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G/A | 8.50%8.70M shares | +3.40 ppfrom 5.10% | Mar 31, 2026 | SEC |
| May 12, 202611:08 AM ET | Morgan Stanleyand 1 other | 13G/A | 5.40%5.51M shares | −3.70 ppfrom 9.10% | Mar 31, 2026 | SEC |
| Apr 29, 20263:20 PM ET | Vanguard Portfolio Management LLC | 13G | 5.11%5.21M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 20261:01 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −10.03 ppfrom 10.03%Below 5% | Mar 13, 2026 | SEC |
| Feb 13, 20262:37 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G/A | 5.10%5.20M shares | −3.50 ppfrom 8.60% | Dec 31, 2025 | SEC |
| Feb 12, 202612:25 PM ET | Morgan Stanleyand 1 other | 13G/A | 9.10%9.20M shares | +3.50 ppfrom 5.60% | Dec 31, 2025 | SEC |
| Nov 7, 202511:56 AM ET | Morgan Stanleyand 1 other | 13G | 5.60%5.70M shares | New | Sep 30, 2025 | SEC |
| Aug 14, 20251:34 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G/A | 8.60%8.70M shares | +1.40 ppfrom 7.20% | Jun 30, 2025 | SEC |
| May 15, 20251:07 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G/A | 7.20%7.24M shares | +1.30 ppfrom 5.90% | Mar 31, 2025 | SEC |
| Apr 14, 20256:05 AM ET | Jaffer Rehanand 1 other | 13D/A | 4.98%5.00M shares | –Below 5% | Apr 3, 2025 | SEC |
| Mar 11, 20254:06 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G | 5.90%5.91M shares | New | Mar 4, 2025 | SEC |
| Jan 8, 202511:29 AM ET | Vanguard Group Inc | 13G/A | 10.03%10.1M shares | – | Dec 31, 2024 | SEC |
| Nov 5, 20246:23 PM ET | Goldman Sachs Group Inc | 13G/AOld format | – | – | – | SEC |
| Oct 7, 20244:49 PM ET | Morgan Stanley | 13G/AOld format | – | – | – | SEC |
| Aug 15, 20243:54 PM ET | ING Groep NV | 13G/AOld format | – | – | – | SEC |
| Aug 9, 2024 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Jul 3, 2024 | Jaffer Rehan | 13DOld format | – | New | – | SEC |
| Feb 12, 2024 | Morgan Stanley | 13G/AOld format | – | – | – | SEC |
| Feb 8, 20243:13 PM ET | ING Groep NV | 13G/AOld format | – | – | – | SEC |
| Feb 6, 20244:51 PM ET | Goldman Sachs Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 6, 2024 | JPMorgan Chase & Co | 13GOld format | – | New | – | SEC |
| Feb 5, 20245:33 PM ET | Goldman Sachs Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Bank of America Corp | 13G/AOld format | – | – | – | SEC |
| Feb 13, 202310:51 AM ET | ING Groep NV | 13GOld format | – | New | – | SEC |
| Feb 8, 20239:52 AM ET | Goldman Sachs Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2023 | Morgan Stanley | 13G/AOld format | – | – | – | SEC |
| Jan 24, 2023 | CCP SBS GP, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2022 | CCP SBS GP, LLC | 13GOld format | – | New | – | SEC |
| Feb 10, 2022 | Morgan Stanley | 13G/AOld format | – | – | – | SEC |
| Feb 8, 202212:21 PM ET | Goldman Sachs Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 31, 2022 | Bank of America Corp | 13GOld format | – | New | – | SEC |
| Feb 11, 2021 | Neuberger Berman Group LLC | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Janus Henderson Group PLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Morgan Stanley | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Goldman Sachs & Co. LLC | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
2 notices from officers, directors and other affiliates planning to sell Six Flags Entertainment Corporation shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| May 12, 20254:12 PM ET | Michelle McKinney FrymireDirector | 5.93K | $224.6K | May 12, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 14, 20251:58 PM ET | Sauls MonicaOfficer | 1.16K | $43.9K | Mar 14, 2025 | Fidelity Brokerage Services LLC | SEC |