SIX FLAGS ENTERTAINMENT CORP FUN
COM · Common Stock · CUSIP 83001C108 · ISIN US83001C1080
American amusement park company, formed by the merger of Cedar Fair and Six Flags
- SectorConsumer discretionary
- IndustryServices-Amusement & Recreation Services
- HeadquartersCharlotte, NC
- Founded2024
- Websitesixflags.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($323.7k this quarter). Holder counts are more reliable. Shares outstanding: 102.3m as of 2026-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $21.86. Options: 13 managers hold calls ($52.1m notional), 11 hold puts ($29.3m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2024 | 12 |
| Q3 2024 | 326 |
| Q4 2024 | 352 |
| Q1 2025 | 329 |
| Q2 2025 | 330 |
| Q3 2025 | 306 |
| Q4 2025 | 304 |
| Q1 2026 | 294 |
| Q2 2026 | 313 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 312 | 4 |
| Q4 2024 | 147 | 152 |
| Q1 2025 | 136 | 177 |
| Q2 2025 | 159 | 147 |
| Q3 2025 | 138 | 164 |
| Q4 2025 | 132 | 157 |
| Q1 2026 | 121 | 137 |
| Q2 2026 | 149 | 113 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $88.0m | $92.5m | 1.05 |
| Q4 2025 | $61.8m | $33.1m | 0.53 |
| Q1 2026 | $37.5m | $36.8m | 0.98 |
| Q2 2026 | $52.1m | $29.3m | 0.56 |
Biggest buyers
| HAWK RIDGE CAPITAL MANAGEMENT LP | New | +2.8m |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Added | +1.6m |
| BlackRock, Inc. | Added | +756.4k |
| MARSHALL WACE, LLP | Added | +501.3k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +289.0k |
| H PARTNERS MANAGEMENT, LLC | Added | +250.0k |
| AQR CAPITAL MANAGEMENT LLC | New | +233.3k |
| Manatuck Hill Partners, LLC | Added | +230.0k |
| Long Pond Capital, LP | Added | +229.0k |
| Nuveen, LLC | Added | +221.1k |
Biggest sellers
| UBS Group AG | Reduced | -5.2m |
| AMERIPRISE FINANCIAL INC | Reduced | -1.8m |
| HAWK RIDGE CAPITAL MANAGEMENT LP | Sold out | -1.4m |
| DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP | Reduced | -1.0m |
| Invenomic Capital Management LP | Reduced | -994.8k |
| Land & Buildings Investment Management, LLC | Sold out | -642.3k |
| CITADEL ADVISORS LLC | Reduced | -641.8k |
| GOLDMAN SACHS GROUP INC | Reduced | -640.1k |
| JPMORGAN CHASE & CO | Reduced | -562.7k |
| Channing Capital Management, LLC | Sold out | -510.9k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $14.6m683.8k shares |
| JANE STREET GROUP, LLC | Added | $8.8m414.4k shares |
| Centiva Capital, LP | Reduced | $7.2m338.7k shares |
| Chescapmanager LLC | Unchanged | $5.5m258.9k shares |
| Balyasny Asset Management L.P. | New | $3.2m150.0k shares |
| IMC-Chicago, LLC | Added | $3.2m149.2k shares |
| Walleye Trading LLC | New | $2.9m134.9k shares |
| Point72 Asset Management, L.P. | Reduced | $2.4m111.9k shares |
| GROUP ONE TRADING LLC | Reduced | $2.0m91.8k shares |
| CITADEL ADVISORS LLC | Reduced | $1.4m66.8k shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $7.2m336.0k shares |
| Walleye Trading LLC | Added | $5.2m243.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $4.9m232.1k shares |
| WOLVERINE ASSET MANAGEMENT LLC | Unchanged | $3.0m142.4k shares |
| Centiva Capital, LP | Reduced | $2.1m100.0k shares |
| Crawford Fund Management, LLC | Unchanged | $1.5m72.0k shares |
| JANE STREET GROUP, LLC | Added | $1.5m68.7k shares |
| SIMPLEX TRADING, LLC | Reduced | $1.2m58.3k shares |
| IMC-Chicago, LLC | Reduced | $1.1m49.4k shares |
| GROUP ONE TRADING LLC | Reduced | $783.8k36.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2026-07-30 | 14.4% |
| DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP 13G · institution -1.0 pts · filed 2026-08-14 | 7.5% |
| MORGAN STANLEY 13G · institution -3.7 pts · filed 2026-05-12 | 5.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.1% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 1 | $513.0k | — |
| Q1 2025 | 0 | — | 1 | $43.9k | — |
| Q2 2025 | 0 | — | 1 | $224.6k | — |
| Q3 2025 | 1 | $248.1k | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 3 | $6.2m | 0 | — | — |
| Q3 2026 | 1 | $248.3k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-12 | Reilly John T President & CEO, director | Bought plan | $248.3k15.7k shares |
| 2026-06-15 | JAFFER REHAN Director · See Footnote | Bought | $2.9m125.0k shares |
| 2026-06-12 | JAFFER REHAN Director · See Footnote | Bought | $3.0m125.0k shares |
| 2026-05-21 | Spiegel Marilyn G Director | Bought | $47.8k2.5k shares |
| 2026-05-12 | HADDRILL RICHARD M Executive Chair, director | Bought | $190.8k10.0k shares |
| 2026-05-12 | Spiegel Marilyn G Director | Bought | $47.8k2.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 15.9m $339.1m | Added +756.4k |
| DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP 7.24% of their portfolio | 7.7m $164.0m | Reduced -1.0m |
| MORGAN STANLEY 0.01% of their portfolio | 6.1m $129.1m | Added +136.4k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 5.4m $115.7m | Added +289.0k |
| Sachem Head Capital Management LP 2.22% of their portfolio | 5.0m $107.1m | Unchanged |
| DENDUR CAPITAL LP 6.17% of their portfolio | 5.0m $105.5m | Unchanged |
| H PARTNERS MANAGEMENT, LLC 54.51% of their portfolio | 4.9m $104.4m | Added +250.0k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 4.3m $90.9m | Added +60.5k |
| JANA Partners Management, LP 4.61% of their portfolio | 4.1m $87.7m | Unchanged |
| UBS Group AG 0.01% of their portfolio | 3.9m $82.7m | Reduced -5.2m |
| STATE STREET CORP 0.00% of their portfolio | 3.9m $82.6m | Added +193.9k |
| HAWK RIDGE CAPITAL MANAGEMENT LP 1.92% of their portfolio | 2.8m $59.9m | New |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.08% of their portfolio | 2.6m $55.7m | Added +1.6m |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.5m $53.3m | Added +142.2k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 2.3m $49.8m | Reduced -640.1k |
| MARSHALL WACE, LLP 0.04% of their portfolio | 2.0m $43.1m | Added +501.3k |
| GLENVIEW CAPITAL MANAGEMENT, LLC 0.86% of their portfolio | 2.0m $43.0m | Reduced -205.3k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 1.6m $35.1m | Reduced -1.8m |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.6m $33.3m | Added +83.1k |
| NORGES BANK 0.00% of their portfolio | 1.2m $25.2m | Not comparable |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.1m $24.2m | Added +109.5k |
| Chescapmanager LLC 3.10% of their portfolio | 1.1m $23.9m | Unchanged |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 1.1m $23.4m | Reduced -641.8k |
| ING GROEP NV 0.11% of their portfolio | 1.0m $22.3m | Unchanged |
| Long Pond Capital, LP 2.19% of their portfolio | 979.4k $20.9m | Added +229.0k |
| Kanen Wealth Management LLC 4.28% of their portfolio | 832.3k $17.5m | Reduced -16.3k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 717.8k $15.3m | Added +33.5k |
| Balyasny Asset Management L.P. 0.03% of their portfolio | 669.5k $14.3m | Reduced -180.0k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 562.2k $12.0m | Added +8.2k |
| Clearline Capital LP 0.77% of their portfolio | 557.1k $11.9m | Reduced -3.9k |
| FIL Ltd 0.01% of their portfolio | 530.0k $11.3m | Added +105.0k |
| BARCLAYS PLC 0.00% of their portfolio | 512.4k $10.9m | Reduced -106.0k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 499.2k $10.6m | Added +3.9k |
| Jupiter Topco LLC 0.00% of their portfolio | 485.7k $10.3m | First filing |
| Invesco Ltd. 0.00% of their portfolio | 478.3k $10.2m | Reduced -88.8k |
| Invenomic Capital Management LP 0.55% of their portfolio | 431.4k $9.2m | Reduced -994.8k |
| Nuveen, LLC 0.00% of their portfolio | 428.1k $9.1m | Added +221.1k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 425.6k $9.1m | Reduced -224.4k |
| RUSH ISLAND MANAGEMENT, LP 0.59% of their portfolio | 418.9k $8.9m | Reduced -508.9k |
| Thrivent Financial for Lutherans 0.01% of their portfolio | 394.1k $8.4m | Reduced -361 |
| Public Sector Pension Investment Board 0.02% of their portfolio | 351.1k $7.5m | Reduced -12.0k |
| Man Group plc 0.01% of their portfolio | 334.9k $7.1m | Reduced -91.0k |
| Walleye Capital LLC 0.03% of their portfolio | 324.7k $6.9m | Added +192.2k |
| Manatuck Hill Partners, LLC 2.19% of their portfolio | 310.0k $6.6m | Added +230.0k |
| Davidson Kempner Capital Management LP 0.10% of their portfolio | 293.5k $6.3m | Reduced -80.8k |
| WINTON GROUP Ltd 0.17% of their portfolio | 242.0k $5.2m | Added +45.2k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 239.8k $5.1m | Reduced -38.2k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 233.3k $5.0m | New |
| Legal & General Group Plc 0.00% of their portfolio | 225.8k $4.8m | Added +7.3k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 222.3k $4.7m | Added +202.8k |
| Y-Intercept (Hong Kong) Ltd 0.08% of their portfolio | 197.5k $4.2m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 197.0k $4.2m | Reduced -9.4k |
| Swiss National Bank 0.00% of their portfolio | 194.2k $4.1m | Added +4.5k |
| Nearwater Capital Markets, Ltd 0.07% of their portfolio | 194.0k $4.1m | Unchanged |
| Jump Financial, LLC 0.04% of their portfolio | 190.6k $4.1m | Added +151.0k |
| 13D Management LLC 5.57% of their portfolio | 186.5k $4.0m | Unchanged |
| THOMPSON SIEGEL & WALMSLEY LLC 0.07% of their portfolio | 183.6k $3.9m | Reduced -165.8k |
| Luxor Capital Group, LP 0.39% of their portfolio | 168.0k $3.6m | Reduced -44.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 167.7k $3.6m | Added +50.1k |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. 0.22% of their portfolio | 160.3k $3.4m | Reduced -36.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 154.3k $3.3m | Added +16.4k |
| Quinn Opportunity Partners LLC 0.14% of their portfolio | 144.8k $3.1m | Unchanged |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 140.4k $3.0m | Reduced -76.7k |
| PINNACLE ASSOCIATES LTD 0.03% of their portfolio | 138.6k $3.0m | Reduced -7.7k |
| Silver Point Capital L.P. 0.25% of their portfolio | 130.0k $2.8m | Unchanged |
| Knights of Columbus Asset Advisors LLC 0.14% of their portfolio | 128.2k $2.7m | Added +747 |
| LEE DANNER & BASS INC 0.14% of their portfolio | 117.7k $2.5m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 116.4k $2.5m | Reduced -158.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 115.8k $2.5m | Reduced -3.0k |
| Walleye Trading LLC 0.03% of their portfolio | 110.4k $2.4m | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 108.8k $2.3m | Added +18.0k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 106.0k $2.3m | Added +1.4k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 105.1k $2.2m | Added +85.4k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 102.0k $1.8m | Added +32 |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.07% of their portfolio | 101.4k $2.2m | Reduced -8.8k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 100.1k $2.1m | Added +13.8k |
| CONTRARIAN CAPITAL MANAGEMENT, L.L.C. 0.70% of their portfolio | 100.0k $2.1m | New |
| Verition Fund Management LLC 0.01% of their portfolio | 100.0k $2.1m | New |
| HRT FINANCIAL LP 0.01% of their portfolio | 99.6k $2.1m | Added +64.8k |
| Barnett & Company, Inc. 1.57% of their portfolio | 99.5k $2.1m | Added +19.0k |
| CastleKnight Management LP 0.08% of their portfolio | 98.1k $2.1m | Reduced -90.0k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 95.3k $2.0m | Added +4.0k |
| OCCUDO QUANTITATIVE STRATEGIES LP 0.11% of their portfolio | 94.6k $2.0m | New |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 90.1k $1.9m | Added +8.2k |
| CITIGROUP INC 0.00% of their portfolio | 80.2k $1.7m | Added +13.7k |
| Orvieto Partners, L.P. 1.28% of their portfolio | 80.0k $1.7m | Added +15.0k |
| BW Gestao de Investimentos Ltda. 0.04% of their portfolio | 75.2k $1.6m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 74.4k $1.6m | Added +1.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 73.1k $1.6m | Reduced -562.7k |
| Schonfeld Strategic Advisors LLC 0.01% of their portfolio | 72.6k $1.5m | Added +57.7k |
| Qsemble Capital Management, LP 0.19% of their portfolio | 70.7k $1.5m | New |
| HighTower Advisors, LLC 0.00% of their portfolio | 68.2k $1.5m | Reduced -246 |
| BROWN ADVISORY INC 0.00% of their portfolio | 67.5k $1.4m | Reduced -3.0k |
| Havemeyer Place LP 0.14% of their portfolio | 65.8k $1.4m | Reduced -24.1k |
| Savoir Faire Capital Management, L.P. 0.82% of their portfolio | 62.2k $1.3m | Reduced -17.1k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 59.3k $1.3m | Reduced -15.0k |
| Woodline Partners LP 0.00% of their portfolio | 58.6k $1.2m | New |
| Gotham Asset Management, LLC 0.00% of their portfolio | 58.4k $1.2m | New |
| State of New Jersey Common Pension Fund D 0.00% of their portfolio | 57.3k $1.2m | New |
| NEUBERGER BERMAN GROUP LLC 0.00% of their portfolio | 56.9k $1.2m | Reduced -2.5k |