SEC Form 4 · Updated Daily
REGN
— REGENERON PHARMACEUTICALS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| YANCOPOULOS GEORGE | Director · Officer | 310,460 | 2025-12-31 | F |
| Sanofi | 10%+ Owner | 279,766 | 2020-06-09 | S |
| SCHLEIFER LEONARD S | Director · Officer | 214,523 | 2025-12-31 | F |
| MURPHY ANDREW J | Officer | 47,833 | 2025-12-09 | F |
| LAROSA JOSEPH J | Officer | 36,373 | 2026-08-19 | F |
| SING GEORGE L | Director | 31,007 | 2026-01-02 | A |
| Van Plew Daniel P | Officer | 21,673 | 2025-12-09 | F |
| Fenimore Christopher R. | Officer | 19,984 | 2026-08-18 | F |
| RYAN ARTHUR F | Director | 17,303 | 2026-07-02 | S |
| McCourt Marion | Officer | 12,003 | 2026-09-03 | S |
| GOLDSTEIN JOSEPH L | Director | 6,703 | 2026-01-02 | A |
| POON CHRISTINE A | Director | 5,219 | 2026-01-02 | A |
| Pitofsky Jason | Officer | 4,272 | 2026-02-09 | S |
| COLES N ANTHONY | Director | 1,714 | 2026-01-02 | A |
| BROWN MICHAEL S | Director | 1,703 | 2026-01-02 | A |
| Zoghbi Huda Y | Director | 1,703 | 2026-08-10 | S |
| Bassler Bonnie L | Director | 1,703 | 2026-01-07 | S |
| Thompson Craig B. | Director | 775 | 2026-01-02 | A |
| Schenkein David P | Director | 603 | 2026-01-02 | A |
| Guarini Kathryn | Director | 603 | 2026-09-02 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-03 | McCourt Marion | Open-market sale | 1,131 | $857.39 | 12,003 |
| 2026-09-02 | Guarini Kathryn | Option exercise (derivative) | 400 | $0.00 | 1,158 |
| 2026-09-02 | Guarini Kathryn | Open-market sale | 400 | $850.00 | 603 |
| 2026-09-02 | Guarini Kathryn | Option exercise | 400 | $719.37 | 1,003 |
| 2026-09-02 | McCourt Marion | Open-market sale | 1,215 | $850.00 | 13,134 |
| 2026-08-19 | LAROSA JOSEPH J | Option exercise (derivative) | 12,282 | $0.00 | 12,283 |
| 2026-08-19 | LAROSA JOSEPH J | Tax withholding | 9,019 | $830.15 | 36,373 |
| 2026-08-19 | LAROSA JOSEPH J | Option exercise | 12,282 | $381.92 | 45,392 |
| 2026-08-18 | Fenimore Christopher R. | Option exercise (derivative) | 6,283 | $0.00 | 6,000 |
| 2026-08-18 | Fenimore Christopher R. | Tax withholding | 4,599 | $813.47 | 19,984 |
| 2026-08-18 | Fenimore Christopher R. | Option exercise | 6,283 | $381.92 | 24,583 |
| 2026-08-10 | Zoghbi Huda Y | Option exercise (derivative) | 800 | $0.00 | 0 |
| 2026-08-10 | Zoghbi Huda Y | Open-market sale | 800 | $800.00 | 1,703 |
| 2026-08-10 | Zoghbi Huda Y | Option exercise | 800 | $376.69 | 2,503 |
| 2026-08-10 | Guarini Kathryn | Option exercise (derivative) | 400 | $0.00 | 1,558 |
| 2026-08-10 | Guarini Kathryn | Open-market sale | 400 | $800.00 | 603 |
| 2026-08-10 | Guarini Kathryn | Option exercise | 400 | $719.37 | 1,003 |
| 2026-07-02 | RYAN ARTHUR F | Open-market sale | 200 | $650.15 | 17,303 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 2 | $714.13 | 17,503 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 1 | $712.09 | 17,505 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 5 | $711.49 | 17,506 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 2 | $710.87 | 17,511 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 6 | $709.45 | 17,513 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 4 | $707.40 | 17,519 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 7 | $706.74 | 17,523 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 14 | $705.56 | 17,530 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 15 | $704.28 | 17,544 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 24 | $703.46 | 17,559 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 15 | $702.46 | 17,583 |
| 2026-05-01 | RYAN ARTHUR F | Open-market sale | 5 | $701.76 | 17,598 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 40 | $779.71 | 17,603 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 4 | $778.24 | 17,643 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 9 | $777.42 | 17,647 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 13 | $776.62 | 17,656 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 14 | $775.58 | 17,669 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 8 | $774.58 | 17,683 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 8 | $773.59 | 17,691 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 3 | $772.76 | 17,699 |
| 2026-04-01 | RYAN ARTHUR F | Open-market sale | 1 | $771.32 | 17,702 |
| 2026-03-02 | RYAN ARTHUR F | Open-market sale | 20 | $789.28 | 17,703 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.