Through the 90-day period concluding January 10, 2026, Regeneron Pharmaceuticals's top three insider stakeholders include Director P Roy Vagelos (438.07K shares), Bd. Co Chair And President & Cso George Yancopoulos (366.51K shares), Bd. Co Chair And President & Ceo Leonard S Schleifer (254.51K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| P Roy Vagelos | 438,071 | 24 Mar, 2023 | |
| George Yancopoulos | Bd. Co Chair And President & Cso | 366,508 | 05 Jan, 2026 |
| Leonard S Schleifer | Bd. Co Chair And President & Ceo | 254,508 | 05 Jan, 2026 |
| Neil Stahl | Evp Research And Development | 53,434 | 18 Dec, 2024 |
| Andrew J Murphy | Evp Research | 47,833 | 11 Dec, 2025 |
| George L Sing | 32,007 | 06 Jan, 2026 | |
| Joseph J Larosa | Evp General Counsel And Secret | 29,517 | 09 Dec, 2025 |
| Robert E Landry | Evp Finance Cfo | 23,693 | 06 Feb, 2024 |
| Plew Daniel P Van | Evp & General Mgr And Industrial | 21,673 | 11 Dec, 2025 |
| Christopher R. Fenimore | Evp Finance Cfo | 18,325 | 09 Dec, 2025 |
| Arthur F Ryan | 17,903 | 06 Jan, 2026 | |
| Marion Mccourt | Evp Commercial | 14,349 | 11 Dec, 2025 |
| Michael S Brown | 7,865 | 06 Jan, 2026 | |
| Joseph L Goldstein | 6,703 | 06 Jan, 2026 | |
| Jason Pitofsky | Vp Controller | 5,487 | 09 Dec, 2025 |
| Christine A Poon | 5,219 | 06 Jan, 2026 | |
| Marc Tessier-Lavigne | 2,434 | 05 Jan, 2023 | |
| N Anthony Coles | 1,714 | 06 Jan, 2026 | |
| Bonnie L Bassler | 1,703 | 08 Jan, 2026 | |
| Huda Y Zoghbi | 1,703 | 06 Jan, 2026 | |
| Craig B. Thompson | 775 | 06 Jan, 2026 | |
| David P Schenkein | 603 | 06 Jan, 2026 | |
| Kathryn Guarini | 603 | 06 Jan, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 07 Jan, 2026 | Bonnie L Bassler | Common Stock | D | 1,500 | $800.00 | 1,703 | D | S |
| 07 Jan, 2026 | Bonnie L Bassler | Common Stock | A | 1,500 | $374.12 | 3,203 | D | M |
| 02 Jan, 2026 | Michael S Brown | Common Stock | A | 155 | $0.00 | 1,703 | D | A |
| 02 Jan, 2026 | Arthur F Ryan | Common Stock | A | 155 | $0.00 | 17,903 | D | A |
| 02 Jan, 2026 | Christine A Poon | Common Stock | A | 155 | $0.00 | 5,219 | D | A |
| 02 Jan, 2026 | N Anthony Coles | Common Stock | A | 155 | $0.00 | 1,714 | D | A |
| 02 Jan, 2026 | George L Sing | Common Stock | A | 155 | $0.00 | 31,007 | D | A |
| 02 Jan, 2026 | Joseph L Goldstein | Common Stock | A | 155 | $0.00 | 6,703 | D | A |
| 02 Jan, 2026 | Craig B. Thompson | Common Stock | A | 155 | $0.00 | 775 | D | A |
| 02 Jan, 2026 | David P Schenkein | Common Stock | A | 155 | $0.00 | 603 | D | A |
| 02 Jan, 2026 | Huda Y Zoghbi | Common Stock | A | 155 | $0.00 | 1,703 | D | A |
| 02 Jan, 2026 | Bonnie L Bassler | Common Stock | A | 155 | $0.00 | 1,703 | D | A |
| 02 Jan, 2026 | Kathryn Guarini | Common Stock | A | 155 | $0.00 | 603 | D | A |
| 31 Dec, 2025 | Leonard S Schleifer | Common Stock | D | 28,570 | $772.09 | 214,523 | D | F |
| 31 Dec, 2025 | Leonard S Schleifer | Common Stock | A | 28,570 | $0.00 | 243,093 | D | M |
| 31 Dec, 2025 | George Yancopoulos | Common Stock | A | 28,570 | $0.00 | 339,030 | D | M |
| 31 Dec, 2025 | George Yancopoulos | - | - | 339,030 | D | |||
| 31 Dec, 2025 | George Yancopoulos | Common Stock | D | 28,570 | $772.09 | 310,460 | D | F |
| 30 Dec, 2025 | George L Sing | Common Stock | A | 9,212 | $520.01 | 37,040 | D | M |
| 30 Dec, 2025 | George L Sing | Common Stock | D | 6,188 | $774.03 | 30,852 | D | F |