Christopher R. Fenimore serves as Executive at REGENERON PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Christopher R. Fenimore has executed 154 insider transactions totaling $30.3M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 8, 2025 involved selling 992 shares valued at $707.2K.
Christopher R. Fenimore currently holds 18,300 shares of REGENERON PHARMACEUTICALS INC (REGN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Christopher R. Fenimore has been a net seller of REGN stock. They have purchased $0 and sold $30.3M worth of shares.
Christopher R. Fenimore's most recent insider trade was on Dec 8, 2025, when they sold 992 shares at $712.94 per share.
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| $N/A |
| Discretionary |
| Aug 28, 2024 | REGN | $1.1M | Sale | 928 | $1205.49 | Discretionary |
| Aug 28, 2024 | REGN | $283.3K | Sale | 235 | $1205.67 | Discretionary |
| Aug 28, 2024 | REGN | $241.3K | Sale | 200 | $1206.70 | Discretionary |
| Aug 28, 2024 | REGN | $284.5K | Sale | 236 | $1205.67 | Discretionary |
| Aug 28, 2024 | REGN | $542.8K | Sale | 450 | $1206.15 | Discretionary |
| Aug 28, 2024 | REGN | $241.3K | Sale | 200 | $1206.67 | Discretionary |
| Aug 28, 2024 | REGN | $2.7M | Sale | 2,237 | $1204.71 | Discretionary |
| Aug 28, 2024 | REGN | $241.3K | Sale | 200 | $1206.30 | Discretionary |
| Aug 28, 2024 | REGN | $923.4K | Sale | 766 | $1205.44 | Discretionary |
| Aug 28, 2024 | REGN | $274.7K | Sale | 228 | $1204.79 | Discretionary |
| Feb 9, 2024 | REGN | $996.4K | Sale | 1,046 | $952.62 | Discretionary |
| Feb 9, 2024 | REGN | $463.3K | Sale | 487 | $951.39 | Discretionary |
| Feb 9, 2024 | REGN | $327.0K | Sale | 344 | $950.49 | Discretionary |
| Feb 9, 2024 | REGN | $1.1M | Sale | 1,100 | $954.57 | Discretionary |
| Feb 9, 2024 | REGN | $573.0K | Sale | 600 | $955.00 | Discretionary |
| Feb 9, 2024 | REGN | $1.3M | Sale | 1,342 | $953.47 | Discretionary |
| Jan 23, 2024 | REGN | $3.8M | Payment | 3,986 | $948.50 | Discretionary |
| Jan 23, 2024 | REGN | $2.0M | Option Exercise | 5,000 | $399.66 | Discretionary |
| Jan 23, 2024 | REGN | $3.4M | Payment | 3,583 | $948.50 | Discretionary |
| Jan 23, 2024 | REGN | $2.8M | Option Exercise | 5,000 | $555.67 | Discretionary |
| Jan 3, 2024 | REGN | $3.7M | Payment | 4,043 | $912.30 | Discretionary |
| Jan 3, 2024 | REGN | $2.8M | Option Exercise | 5,000 | $555.67 | Discretionary |
| Jan 3, 2024 | REGN | $2.0M | Option Exercise | 5,000 | $399.66 | Discretionary |
| Jan 3, 2024 | REGN | $3.2M | Payment | 3,469 | $912.30 | Discretionary |
| Dec 27, 2023 | REGN | $2.1M | Sale | 2,448 | $856.71 | Planned |
| Dec 22, 2023 | REGN | $211.6K | Sale | 250 | $846.27 | Planned |
| Dec 21, 2023 | REGN | $384.8K | Sale | 456 | $843.79 | Planned |
| Dec 21, 2023 | REGN | $1.0M | Sale | 1,224 | $844.09 | Planned |