According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Six Flags Entertainment Corporation are President & Ceo Richard Zimmerman (770.58K shares), Executive Chairman Selim A Bassoul (537.22K shares), Chief Financial Officer Brian C Witherow (314.23K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Richard Zimmerman | President & Ceo | 770,577 | 09 Dec, 2025 |
| Selim A Bassoul | Executive Chairman | 537,223 | 05 Jan, 2026 |
| Brian C Witherow | Chief Financial Officer | 314,234 | 05 Jun, 2025 |
| Tim Fisher | Chief Operating Officer | 241,334 | 25 Aug, 2025 |
| John T Reilly | President & Ceo | 159,847 | 09 Dec, 2025 |
| David R. Hoffman | Chief Accounting Officer | 90,966 | 05 Jun, 2025 |
| Brian Nurse | Chief Legal Officer | 90,338 | 05 Jun, 2025 |
| Daniel J Hanrahan | 57,688 | 05 Jan, 2026 | |
| Christian Dieckmann | Chief Commercial Officer | 41,291 | 05 Jun, 2025 |
| D Scott Olivet | 41,144 | 27 Jun, 2025 | |
| Robert Anderson White | Chief Commercial Officer | 40,782 | 06 May, 2025 |
| Monica Sauls | Chief Hr Officer | 34,473 | 24 Jun, 2025 |
| Tayfun Tastepe | Chief Digital & Tech Officer | 33,301 | 02 Apr, 2025 |
| Esi Eggleston Bracey | 28,520 | 28 Mar, 2025 | |
| Jennifer Mason | 26,129 | 06 Jan, 2026 | |
| Enrique Ramirez | 24,953 | 28 Mar, 2025 | |
| Felipe Dutra | 16,453 | 06 Jan, 2026 | |
| Louis Carr | 15,245 | 29 Dec, 2025 | |
| Steven E Hoffman | 13,473 | 08 Aug, 2025 | |
| Michelle M Frymire | 7,162 | 12 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Jan, 2026 | Felipe Dutra | Common Stock, par value $0.01 per share | A | 13,038 | $0.00 | 16,453 | D | A |
| 02 Jan, 2026 | Jennifer Mason | Common Stock, par value $0.01 per share | A | 13,038 | $0.00 | 26,129 | D | A |
| 31 Dec, 2025 | Selim A Bassoul | - | - | 648,178 | D | |||
| 31 Dec, 2025 | Selim A Bassoul | Common Stock, par value $0.01 per share | A | 261,000 | $0.00 | 648,178 | D | A |
| 31 Dec, 2025 | Selim A Bassoul | - | - | 537,223 | D | |||
| 31 Dec, 2025 | Selim A Bassoul | Common Stock, par value $0.01 per share | D | 110,955 | $15.34 | 537,223 | D | F |
| 31 Dec, 2025 | Daniel J Hanrahan | Common Stock, par value $0.01 per share | D | 7,162 | $15.34 | 57,688 | D | D |
| 31 Dec, 2025 | Daniel J Hanrahan | Common Stock, par value $0.01 per share | A | 7,162 | - | 64,850 | D | M |
| 24 Dec, 2025 | Louis Carr | - | - | 15,245 | D | |||
| 24 Dec, 2025 | Louis Carr | Common Stock, par value $0.01 per share | A | 3,581 | - | 18,826 | D | M |
| 24 Dec, 2025 | Louis Carr | Common Stock, par value $0.01 per share | D | 3,581 | $14.35 | 15,245 | D | D |
| 24 Dec, 2025 | Louis Carr | - | - | 18,826 | D | |||
| 08 Dec, 2025 | John T Reilly | - | - | 159,847 | D | |||
| 08 Dec, 2025 | John T Reilly | Common Stock, par value $0.01 per share | A | 159,847 | $0.00 | 159,847 | D | A |
| 05 Dec, 2025 | Richard Zimmerman | Common Stock, par value $0.01 per share | D | 114,531 | $15.32 | 602,697 | D | F |
| 05 Dec, 2025 | Richard Zimmerman | - | - | 602,697 | D | |||
| 05 Dec, 2025 | Richard Zimmerman | Common Stock, par value $0.01 per share | A | 298,190 | $0.00 | 900,887 | D | A |
| 05 Dec, 2025 | Richard Zimmerman | - | - | 770,577 | D | |||
| 05 Dec, 2025 | Richard Zimmerman | - | - | 900,887 | D | |||
| 05 Dec, 2025 | Richard Zimmerman | Common Stock, par value $0.01 per share | D | 130,310 | $15.32 | 770,577 | D | F |