REGN's three largest insider shareholders as of April 17, 2026 are P Roy Vagelos (Chairman Of The Board, 312.58K shares), George Yancopoulos (Bd. Co Chair, President Cso, 310.46K shares), Leonard S Schleifer (Bd. Co Chair, President Ceo, 214.52K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| P Roy Vagelos | Chairman Of The Board | 312,578 | 0 | 24 Mar, 2023 |
| George Yancopoulos | Bd. Co Chair, President Cso | 310,460 | 0 | 05 Jan, 2026 |
| Leonard S Schleifer | Bd. Co Chair, President Ceo | 214,523 | 0 | 05 Jan, 2026 |
| George Yancopoulos | Bd. Co Chair, President Cso | 0 | 180,000 | 04 Jan, 2024 |
| P Roy Vagelos | Chairman Of The Board | 0 | 125,493 | 05 Apr, 2023 |
| George Yancopoulos | Bd. Co Chair, President Cso | 0 | 56,048 | 12 Jun, 2024 |
| Neil Stahl | Evp Research And Development | 48,829 | 0 | 18 Dec, 2024 |
| Andrew J Murphy | Evp Research | 47,833 | 0 | 11 Dec, 2025 |
| Leonard S Schleifer | Bd. Co Chair, President Ceo | 0 | 39,985 | 13 Jun, 2024 |
| George L Sing | - | 31,007 | 0 | 06 Jan, 2026 |
| Joseph J Larosa | Evp General Counsel And Secret | 29,517 | 0 | 09 Dec, 2025 |
| Robert E Landry | Evp Finance Cfo | 23,693 | 0 | 06 Feb, 2024 |
| P Roy Vagelos | Chairman Of The Board | 0 | 23,461 | 30 Mar, 2022 |
| Plew Daniel P Van | Evp General Mgr, Industrial | 21,673 | 0 | 11 Dec, 2025 |
| Christopher R. Fenimore | Evp Finance Cfo | 18,300 | 0 | 09 Dec, 2025 |
| Marion Mccourt | Evp Commercial | 14,349 | 0 | 11 Dec, 2025 |
| Joseph L Goldstein | - | 6,703 | 0 | 06 Jan, 2026 |
| Michael S Brown | - | 0 | 6,162 | 08 Feb, 2023 |
| Christine A Poon | - | 5,219 | 0 | 06 Jan, 2026 |
| Neil Stahl | Evp Research And Development | 0 | 4,605 | 06 Dec, 2021 |
| Jason Pitofsky | Svp Controller | 4,272 | 0 | 11 Feb, 2026 |
| Marc Tessier-Lavigne | - | 2,434 | 0 | 05 Jan, 2023 |
| P Roy Vagelos | Chairman Of The Board | 0 | 1,961 | 21 Dec, 2022 |
| N Anthony Coles | - | 1,714 | 0 | 06 Jan, 2026 |
| Michael S Brown | - | 1,703 | 0 | 06 Jan, 2026 |
| Bonnie L Bassler | - | 1,703 | 0 | 08 Jan, 2026 |
| Huda Y Zoghbi | - | 1,703 | 0 | 23 Feb, 2026 |
| George L Sing | - | 0 | 1,000 | 18 Nov, 2021 |
| Craig B. Thompson | - | 775 | 0 | 06 Jan, 2026 |
| George L Sing | - | 0 | 750 | 30 Aug, 2021 |
| David P Schenkein | - | 603 | 0 | 06 Jan, 2026 |
| Kathryn Guarini | - | 603 | 0 | 06 Jan, 2026 |
| Jason Pitofsky | Vp Controller | 0 | 179 | 10 Dec, 2024 |
| Christopher R. Fenimore | Svp Finance Cfo | 0 | 50 | 29 Aug, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | A | 1,638 | $376.69 | 3,341 | D | M |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 49 | $774.68 | 3,292 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 50 | $775.50 | 3,242 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 53 | $778.47 | 3,189 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 208 | $779.55 | 2,981 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 331 | $780.45 | 2,650 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 209 | $781.28 | 2,441 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 298 | $782.10 | 2,143 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 220 | $783.29 | 1,923 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 160 | $784.45 | 1,763 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 56 | $785.61 | 1,707 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Common Stock | D | 4 | $790.00 | 1,703 | D | S |
| 19 Feb, 2026 | Huda Y Zoghbi | Non-Qualified Stock Option (right to buy) | D | 1,638 | $0.00 | 800 | D | M |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | A | 1,000 | $492.00 | 6,308 | D | M |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 20 | $775.95 | 6,288 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 521 | $776.43 | 5,767 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 391 | $777.51 | 5,376 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 563 | $778.35 | 4,813 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 205 | $779.56 | 4,608 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 75 | $780.06 | 4,533 | D | S |