Bonnie L. Bassler serves as Executive at REGENERON PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Bonnie L. Bassler has executed 81 insider transactions totaling $21.1M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 2, 2026 involved receiving (via award) 1,962 shares valued at $0.
Bonnie L. Bassler currently holds 1,962 shares of REGENERON PHARMACEUTICALS INC (REGN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Bonnie L. Bassler has been a net seller of REGN stock. They have purchased $0 and sold $21.1M worth of shares.
Bonnie L. Bassler's most recent insider trade was on Jan 2, 2026, when they sold 1,962 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Nov 20, 2025 | REGN | $282.3K | Option Exercise | 760 | $371.40 | Discretionary |
| Nov 20, 2025 | REGN | $570.0K | Sale | 760 | $750.00 | Discretionary |
| Sep 30, 2025 | RPRX | $37.5K | Award | 1,047 | $35.79 | Discretionary |
| Sep 30, 2024 | RPRX | $37.5K | Award | 1,342 | $27.92 | Discretionary |
| Aug 15, 2024 | REGN | $280.8K | Option Exercise | 756 | $371.40 | Planned |
| Aug 15, 2024 | REGN | $884.5K | Sale | 756 | $1170.00 | Planned |
| Aug 2, 2024 | REGN | $842.9K | Sale | 756 | $1115.00 | Planned |
| Aug 2, 2024 | REGN | $280.8K | Option Exercise | 756 | $371.40 | Planned |
| Jun 28, 2024 | RPRX | $37.5K | Award | 1,399 | $26.80 | Discretionary |
| Jun 24, 2024 | REGN | $802.9K | Sale | 756 | $1062.00 | Planned |
| Jun 24, 2024 | REGN | $280.8K | Option Exercise | 756 | $371.40 | Planned |
| Jun 7, 2024 | RPRX | $0 | Award | 9,293 | $N/A | Discretionary |
| Jun 5, 2024 | REGN | $836.1K | Sale | 827 | $1011.00 | Planned |
| Jun 5, 2024 | REGN | $315.0K | Option Exercise | 827 | $380.95 | Planned |
| Mar 28, 2024 | RPRX | $37.5K | Award | 1,240 | $30.23 | Discretionary |
| Feb 26, 2024 | REGN | $836.3K | Sale | 854 | $979.25 | Discretionary |
| Feb 26, 2024 | REGN | $334.7K | Option Exercise | 854 | $391.92 | Discretionary |
| Jan 30, 2024 | REGN | $793.1K | Sale | 827 | $959.00 | Planned |
| Jan 30, 2024 | REGN | $315.0K | Option Exercise | 827 | $380.95 | Planned |
| Jan 3, 2024 | REGN | $314.7K | Option Exercise | 826 | $380.95 | Planned |
| Jan 3, 2024 | REGN | $755.0K | Sale | 826 | $914.00 | Planned |
| Jan 2, 2024 | REGN | $0 | Award | 135 | $N/A | Planned |
| Dec 29, 2023 | RPRX | $37.5K | Award | 1,353 | $27.71 | Discretionary |
| Dec 13, 2023 | REGN | $530.7K | Sale | 610 | $870.00 | Planned |
| Dec 13, 2023 | REGN | $229.8K | Option Exercise | 610 | $376.69 | Planned |
| Sep 29, 2023 | RPRX | $37.5K | Award | 1,384 | $27.08 | Discretionary |
| Aug 21, 2023 | REGN | $707.1K | Sale | 853 | $829.00 | Planned |
| Aug 21, 2023 | REGN | $334.3K | Option Exercise | 853 | $391.92 | Planned |