19 insiders reported 138 Form 4 transactions for REGENERON PHARMACEUTICALS, INC. (REGN) over the past 18 months (most recent 2026-09-03). Recent activity: McCourt Marion (EVP Commercial) Sell 1,215 shares, Guarini Kathryn (Director) Buy 400 shares, McCourt Marion (EVP Commercial) Sell 1,131 shares, Guarini Kathryn (Director) Sell 400 shares, LAROSA JOSEPH J (EVP General Counsel and Secret) Buy 12,282 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-03 | McCourt Marion | EVP Commercial | Sell | 1,215 | $1.0M |
| 2026-09-03 | Guarini Kathryn | Director | Buy | 400 | $287,748 |
| 2026-09-03 | McCourt Marion | EVP Commercial | Sell | 1,131 | $969,708 |
| 2026-09-03 | Guarini Kathryn | Director | Sell | 400 | $340,000 |
| 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 | 2 | $1,428 |
| 2026-05-04 | RYAN ARTHUR F | Director | Sell | 5 | $3,509 |
| 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 | 15 | $10,564 |
| 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 |
Source: SEC Form 4 filings · as of 2026-09-03