According to recent filings covering the 90 days ending December 12, 2025, the three most significant insider holders at Regeneron Pharmaceuticals are Bd. Co Chair And President & CEO Leonard S Schleifer (506.86K shares), EVP Research Andrew J Murphy (52.06K shares), EVP General Counsel And Secret Joseph J Larosa (29.52K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| P Roy Vagelos | 438,071 | 24 Mar, 2023 | |
| George Yancopoulos | Bd. Co Chair And President & Cso | 366,508 | 11 Dec, 2025 |
| Leonard S Schleifer | Bd. Co Chair And President & CEO | 254,508 | 11 Dec, 2025 |
| Neil Stahl | EVP Research And Development | 53,434 | 18 Dec, 2024 |
| Andrew J Murphy | EVP Research | 47,833 | 11 Dec, 2025 |
| Joseph J Larosa | EVP General Counsel And Secret | 29,517 | 09 Dec, 2025 |
| George L Sing | 28,828 | 03 Jan, 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 | 17,748 | 06 Jan, 2025 | |
| Marion Mccourt | EVP Commercial | 14,349 | 11 Dec, 2025 |
| Michael S Brown | 7,710 | 06 Jan, 2025 | |
| Joseph L Goldstein | 6,548 | 06 Jan, 2025 | |
| Jason Pitofsky | VP Controller | 5,487 | 09 Dec, 2025 |
| Christine A Poon | 5,064 | 31 Oct, 2025 | |
| Marc Tessier-Lavigne | 2,434 | 05 Jan, 2023 | |
| N Anthony Coles | 1,559 | 06 Jan, 2025 | |
| Bonnie L Bassler | 1,548 | 24 Nov, 2025 | |
| Huda Y Zoghbi | 1,548 | 06 Jan, 2025 | |
| Craig B. Thompson | 620 | 06 Jan, 2025 | |
| David P Schenkein | 448 | 06 Jan, 2025 | |
| Kathryn Guarini | 448 | 06 Jan, 2025 |
* 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 Dec, 2025 | Plew Daniel P Van | Common Stock | D | 2,552 | $701.51 | 21,673 | D | F |
| 09 Dec, 2025 | Marion Mccourt | Common Stock | D | 1,021 | $701.51 | 14,349 | D | F |
| 09 Dec, 2025 | Andrew J Murphy | Common Stock | D | 4,229 | $701.51 | 47,833 | D | F |
| 09 Dec, 2025 | George Yancopoulos | Common Stock | A | 146,815 | $555.67 | 442,334 | D | M |
| 09 Dec, 2025 | Leonard S Schleifer | Common Stock | A | 172,723 | $555.67 | 369,668 | D | M |
| 09 Dec, 2025 | George Yancopoulos | Common Stock | D | 131,874 | $701.51 | 310,460 | D | F |
| 09 Dec, 2025 | Leonard S Schleifer | Common Stock | D | 155,145 | $701.51 | 214,523 | D | F |
| 05 Dec, 2025 | Joseph J Larosa | Common Stock | A | 2,476 | $0.00 | 30,913 | D | A |
| 05 Dec, 2025 | Christopher R. Fenimore | Common Stock | A | 3,027 | $0.00 | 19,292 | D | A |
| 05 Dec, 2025 | Jason Pitofsky | Common Stock | A | 2,064 | $0.00 | 6,297 | D | A |
| 05 Dec, 2025 | Andrew J Murphy | Common Stock | A | 3,715 | $0.00 | 53,761 | D | A |
| 05 Dec, 2025 | Plew Daniel P Van | Common Stock | A | 3,715 | $0.00 | 26,131 | D | A |
| 05 Dec, 2025 | Marion Mccourt | Common Stock | A | 2,476 | $0.00 | 16,706 | D | A |
| 08 Dec, 2025 | Joseph J Larosa | Common Stock | D | 1,396 | $712.94 | 29,517 | D | F |
| 08 Dec, 2025 | Plew Daniel P Van | Common Stock | D | 1,906 | $712.94 | 24,225 | D | F |
| 08 Dec, 2025 | Marion Mccourt | Common Stock | D | 1,336 | $712.94 | 15,370 | D | F |
| 08 Dec, 2025 | Andrew J Murphy | Common Stock | D | 1,699 | $712.94 | 52,062 | D | F |
| 08 Dec, 2025 | Christopher R. Fenimore | Common Stock | D | 992 | $712.94 | 18,300 | D | F |
| 08 Dec, 2025 | Jason Pitofsky | Common Stock | D | 989 | $712.94 | 5,308 | D | F |
| 20 Nov, 2025 | Bonnie L Bassler | Common Stock | A | 760 | $371.40 | 2,308 | D | M |