19 insiders reported 134 Form 4 transactions for REGENERON PHARMACEUTICALS, INC. (REGN) over the past 18 months (most recent 2026-08-21). Recent activity: LAROSA JOSEPH J (EVP General Counsel and Secret) Buy 12,282 shares, LAROSA JOSEPH J (EVP General Counsel and Secret) Sell 9,019 shares, Fenimore Christopher R. (EVP Finance CFO) Buy 6,283 shares, Fenimore Christopher R. (EVP Finance CFO) Sell 4,599 shares, Guarini Kathryn (Director) Buy 400 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-21 | LAROSA JOSEPH J | EVP General Counsel and Secret | Buy | 12,282 | $4.7M |
| 2026-08-21 | LAROSA JOSEPH J | EVP General Counsel and Secret | Sell | 9,019 | $7.5M |
| 2026-08-20 | Fenimore Christopher R. | EVP Finance CFO | Buy | 6,283 | $2.4M |
| 2026-08-20 | Fenimore Christopher R. | EVP Finance CFO | Sell | 4,599 | $3.7M |
| 2026-08-12 | Guarini Kathryn | Director | Buy | 400 | $287,748 |
| 2026-08-12 | Zoghbi Huda Y | Director | Buy | 800 | $301,352 |
| 2026-08-12 | Zoghbi Huda Y | Director | Sell | 800 | $640,000 |
| 2026-08-12 | Guarini Kathryn | Director | Sell | 400 | $320,000 |
| 2026-07-07 | RYAN ARTHUR F | Director | Sell | 200 | $130,030 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 15 | $10,564 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 15 | $10,537 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 24 | $16,883 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 14 | $9,878 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 7 | $4,947 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 4 | $2,830 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 6 | $4,257 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 2 | $1,422 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 5 | $3,557 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 1 | $712 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 2 | $1,428 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 5 | $3,509 |
| 2026-04-03 | RYAN ARTHUR F | Director | Sell | 8 | $6,197 |
| 2026-04-03 | RYAN ARTHUR F | Director | Sell | 1 | $771 |
| 2026-04-03 | RYAN ARTHUR F | Director | Sell | 3 | $2,318 |
| 2026-04-03 | RYAN ARTHUR F | Director | Sell | 8 | $6,189 |
Source: SEC Form 4 filings · as of 2026-08-21