Mark S. Shapiro serves as Executive at SIX FLAGS INC, where they oversee executive responsibilities. Since joining the company, Mark S. Shapiro has executed 128 insider transactions totaling $53.1M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 22, 2026 involved selling 14,363 shares valued at $2.9M.
Mark S. Shapiro currently holds 118,400 shares of SIX FLAGS INC (SIX), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark S. Shapiro has been a net seller of SIX stock. They have purchased $1.9M and sold $51.2M worth of shares.
Mark S. Shapiro's most recent insider trade was on Jan 22, 2026, when they sold 14,363 shares at $201.98 per share.
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| $N/A |
| Discretionary |
| Jan 20, 2026 | TKO | $0 | Option Exercise | 27,921 | $N/A | Discretionary |
| Jan 5, 2026 | TKO | $6.5M | Sale | 32,022 | $204.08 | Discretionary |
| Jan 1, 2026 | TKO | $0 | Award | 59,964 | $N/A | Discretionary |
| Dec 31, 2025 | TKO | $0 | Option Exercise | 63,187 | $N/A | Discretionary |
| Dec 31, 2025 | TKO | $0 | Option Exercise | 63,187 | $N/A | Discretionary |
| Sep 16, 2024 | TKO | $3.6M | Sale | 31,026 | $114.76 | Planned |
| Sep 12, 2024 | TKO | $0 | Option Exercise | 60,651 | $N/A | Planned |
| Feb 28, 2024 | EQR | $100.0K | Award | 1,976 | $50.60 | Discretionary |
| Feb 23, 2024 | EDR | $550.7K | Sale | 22,805 | $24.15 | Discretionary |
| Feb 22, 2024 | EDR | $1.7M | Sale | 70,600 | $24.08 | Discretionary |
| Feb 22, 2024 | EDR | $0 | Option Exercise | 44,311 | $N/A | Discretionary |
| Feb 21, 2024 | EDR | $0 | Option Exercise | 149,025 | $N/A | Discretionary |
| Nov 14, 2023 | TKO | $1000.0K | Purchase | 12,531 | $79.80 | Discretionary |
| Aug 28, 2023 | EDR | $73.8K | Sale | 3,060 | $24.13 | Discretionary |
| Aug 25, 2023 | EDR | $0 | Award | 6,095 | $N/A | Discretionary |
| Aug 17, 2023 | EDR | $5.8M | Sale | 240,000 | $24.29 | Discretionary |
| Aug 17, 2023 | EDR | $0 | Conversion | 240,000 | $N/A | Discretionary |
| Aug 17, 2023 | EDR | $0 | Disposition | 240,000 | $N/A | Discretionary |
| Aug 17, 2023 | EDR | $0 | Conversion | 240,000 | $N/A | Discretionary |
| Aug 16, 2023 | EDR | $0 | Conversion | 133,837 | $N/A | Discretionary |
| Aug 16, 2023 | EDR | $0 | Disposition | 133,837 | $N/A | Discretionary |
| Aug 16, 2023 | EDR | $0 | Conversion | 133,837 | $N/A | Discretionary |
| Aug 16, 2023 | EDR | $5.6M | Sale | 229,032 | $24.66 | Discretionary |
| Jun 15, 2023 | EQR | $0 | Award | 2,863 | $N/A | Discretionary |
| May 4, 2023 | EQR | $322.5K | Option Exercise | 6,704 | $48.10 | Discretionary |
| May 4, 2023 | EQR | $413.8K | Sale | 6,704 | $61.72 | Discretionary |
| May 4, 2023 | EQR | $1.8M | Sale | 29,250 | $61.96 | Discretionary |
| May 4, 2023 | EQR | $338.3K | Option Exercise | 6,481 | $52.20 | Discretionary |