| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Van Plew Daniel P | EVP & General Mgr, Industrial | 777 OLD SAW MILL RIVER ROAD, TARRYTOWN | /s/ Daniel P. Van Plew | 11 Dec 2025 | 0001411984 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | REGN | Common Stock | Tax liability | $1,790,254 | -2,552 | -11% | $701.51 | 21,673 | 09 Dec 2025 | Direct | |
| holding | REGN | Common Stock | 12,376 | 09 Dec 2025 | By 2025 GRAT | ||||||
| holding | REGN | Common Stock | 1,129 | 09 Dec 2025 | By 401(k) Plan |