REGENERON PHARMACEUTICALS INC (REGN) is a publicly traded company in the Unknown sector. Across all available filings, 23 corporate insiders have executed 1047 transactions totaling $457.6M, demonstrating a bearish sentiment with -$457.6M in net insider flow. The most recent transaction on Jan 2, 2026 involved a transaction of 1,962 shares valued at $0.
No significant insider buying has been recorded for REGN in the recent period.
No significant insider selling has been recorded for REGN in the recent period.
Based on recent SEC filings, insider sentiment for REGN is bearish with an Insider Alignment Score of 0/100 and a net flow of -$457.6M. Insiders are reducing their positions, though this can be driven by factors unrelated to company outlook.
Insider trading at REGENERON PHARMACEUTICALS INC (REGN) refers to stock transactions made by corporate insiders—executives, directors, and beneficial owners holding more than 10% of the company's shares. These individuals have access to material non-public information and are required by law to report their trades to the SEC within two business days. Currently, 23 insiders are actively trading REGN stock, having executed 1047 transactions in the past 90 days. The most active insider is Leonard S. Schleifer (Executive), who has made 32 transactions totaling $544.0M.
Get notified when executives and directors at REGN file new Form 4 transactions
Date | Insider | Title | Type | Shares | Price | Value | Flags |
|---|---|---|---|---|---|---|---|
| Jan 2, 2026 | L. Bassler Bonnie | Executive | Award | 1,962 | $N/A | $0 | |
| Jan 2, 2026 | L. Bassler Bonnie | Executive | Award | 155 | $N/A | $0 | |
| Jan 2, 2026 | S. Brown Michael | Executive | Award | 1,962 | $N/A | $0 | |
| Jan 2, 2026 | S. Brown Michael | Executive | Award | 155 | $N/A | $0 | |
| Dec 31, 2025 | S. Schleifer Leonard | Executive | Option Exercise | 28,570 | $N/A | $0 | |
| Dec 31, 2025 | S. Schleifer Leonard | Executive | Payment | 28,570 | $772.09 | $22.1M | Large |
| Dec 31, 2025 | S. Schleifer Leonard | Executive | Option Exercise | 28,570 | $N/A | $0 | |
| Dec 31, 2025 | Yancopoulos George | Executive | Option Exercise | 28,570 | $N/A | $0 | |
| Dec 31, 2025 | Yancopoulos George | Executive | Payment | 28,570 | $772.09 | $22.1M | Large |
| Dec 31, 2025 | Yancopoulos George | Executive | Option Exercise | 28,570 | $N/A | $0 | |
| Dec 30, 2025 | L. Sing George | Executive | Payment | 6,188 | $774.03 | $4.8M | Large |
| Dec 30, 2025 | L. Sing George | Executive | Option Exercise | 9,212 | $520.01 | $4.8M | Large |
| Dec 9, 2025 | S. Schleifer Leonard | Executive | Payment | 155,145 | $701.51 | $108.8M | Large |
| Dec 9, 2025 | S. Schleifer Leonard | Executive | Option Exercise | 172,723 | $555.67 | $96.0M | Large |
| Dec 9, 2025 | Yancopoulos George | Executive | Payment | 131,874 | $701.51 | $92.5M | Large |
| TYPE | COUNT | VALUE | % |
|---|---|---|---|
Payment(F) | 97 | $970.2M | 47.1% |
Exercise(M) | 126 | $631.8M | 30.7% |
Sale(S) | 748 | $457.6M | 22.2% |
Discretionary(I) | 2 | $102.9K | 0.0% |
Award(A) | 49 | $0 | 0.0% |
Gift(G) | 24 | $0 | 0.0% |
Conversion(C) | 1 | $0 | 0.0% |
Insider selling pressure at REGENERON PHARMACEUTICALS INC has increased, with 23 insiders executing 1047 transactions across all time. Total sales of $457.6M significantly outpace purchases of $0, resulting in a net outflow of $457.6M. This selling activity appears largely discretionary, which may warrant closer attention from investors.