Joseph J. Larosa serves as Executive at REGENERON PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Joseph J. Larosa has executed 137 insider transactions totaling $42.9M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 8, 2025 involved selling 1,396 shares valued at $995.3K.
Joseph J. Larosa currently holds 29,517 shares of REGENERON PHARMACEUTICALS INC (REGN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Joseph J. Larosa has been a net seller of REGN stock. They have purchased $0 and sold $42.9M worth of shares.
Joseph J. Larosa's most recent insider trade was on Dec 8, 2025, when they sold 1,396 shares at $712.94 per share.
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| $N/A |
| Discretionary |
| Nov 20, 2025 | REGN | $8.0M | Option Exercise | 14,450 | $555.67 | Discretionary |
| Nov 20, 2025 | REGN | $9.3M | Payment | 12,686 | $736.77 | Discretionary |
| Jul 11, 2024 | REGN | $2.0M | Sale | 1,866 | $1088.95 | Planned |
| Jun 24, 2024 | REGN | $8.0M | Option Exercise | 14,450 | $555.67 | Discretionary |
| Jun 24, 2024 | REGN | $11.8M | Payment | 11,084 | $1060.13 | Discretionary |
| Jun 10, 2024 | REGN | $0 | Gift | 1,608 | $N/A | Discretionary |
| May 21, 2024 | REGN | $1.9M | Sale | 1,865 | $994.90 | Planned |
| Feb 26, 2024 | REGN | $990.0K | Sale | 1,000 | $990.00 | Discretionary |
| Feb 22, 2024 | REGN | $967.6K | Sale | 1,000 | $967.65 | Discretionary |
| Feb 7, 2024 | REGN | $950.0K | Sale | 1,000 | $950.00 | Discretionary |
| Jan 3, 2024 | REGN | $22.3M | Payment | 24,493 | $912.30 | Discretionary |
| Jan 3, 2024 | REGN | $13.6M | Option Exercise | 34,000 | $399.66 | Discretionary |
| Dec 11, 2023 | REGN | $564.7K | Payment | 669 | $844.09 | Discretionary |
| Dec 8, 2023 | REGN | $0 | Award | 2,133 | $N/A | Discretionary |
| Dec 8, 2023 | REGN | $718.9K | Payment | 852 | $843.79 | Discretionary |
| Mar 23, 2023 | REGN | $5.4M | Payment | 6,742 | $801.59 | Discretionary |
| Mar 23, 2023 | REGN | $2.7M | Option Exercise | 10,000 | $270.43 | Discretionary |
| Mar 10, 2023 | REGN | $0 | Gift | 1,006 | $N/A | Discretionary |
| Dec 16, 2022 | REGN | $0 | Award | 2,752 | $N/A | Discretionary |
| Dec 9, 2022 | REGN | $370.6K | Payment | 492 | $753.28 | Discretionary |
| Sep 9, 2022 | REGN | $15.2M | Payment | 20,730 | $730.96 | Discretionary |
| Sep 9, 2022 | REGN | $8.1M | Option Exercise | 30,000 | $270.43 | Discretionary |
| Apr 7, 2022 | REGN | $3.7M | Sale | 5,114 | $721.10 | Discretionary |
| Apr 1, 2022 | REGN | $172.6K | Sale | 250 | $690.51 | Discretionary |
| Apr 1, 2022 | REGN | $443.2K | Sale | 641 | $691.44 | Discretionary |
| Apr 1, 2022 | REGN | $179.9K | Sale | 259 | $694.56 | Discretionary |
| Apr 1, 2022 | REGN | $212.1K | Sale | 305 | $695.36 | Discretionary |
| Apr 1, 2022 | REGN | $176.9K | Sale | 254 | $696.54 | Discretionary |