Data spanning the past 90 days through February 19, 2026 reveals that Regeneron Pharmaceuticals's three principal insider shareholders consist of 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 | 17,803 | 11 Feb, 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 | |
| Christine A Poon | 5,219 | 06 Jan, 2026 | |
| Jason Pitofsky | Svp Controller | 4,451 | 11 Feb, 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 |
|---|---|---|---|---|---|---|---|---|
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 3 | $783.34 | 17,808 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 1 | $782.53 | 17,811 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 57 | $777.56 | 17,835 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 1 | $775.63 | 17,902 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 1 | $785.71 | 17,806 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 1 | $784.59 | 17,807 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 5 | $779.41 | 17,818 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 1 | $787.82 | 17,803 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 5 | $781.48 | 17,812 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 12 | $778.53 | 17,823 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 1 | $780.09 | 17,817 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 10 | $776.59 | 17,892 | D | S |
| 09 Feb, 2026 | Arthur F Ryan | Common Stock | D | 2 | $786.29 | 17,804 | 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 | 205 | $779.56 | 4,608 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 20 | $775.95 | 6,288 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 37 | $782.67 | 4,470 | D | S |
| 09 Feb, 2026 | Jason Pitofsky | Common Stock | D | 26 | $781.37 | 4,507 | 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 | 1 | $784.66 | 4,325 | D | S |