Data spanning the past 90 days through February 07, 2026 reveals that Alnylam Pharmaceuticals's three principal insider shareholders consist of Chief Executive Officer John Maraganore (227.66K shares), Chief Executive Officer Yvonne Greenstreet (78.41K shares), Evp And Chief Financial Officer Jeffrey V. Poulton (57.47K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| John Maraganore | Chief Executive Officer | 227,663 | 23 Dec, 2021 |
| Yvonne Greenstreet | Chief Executive Officer | 78,411 | 14 Jan, 2026 |
| Jeffrey V. Poulton | Evp And Chief Financial Officer | 57,465 | 14 Jan, 2026 |
| Tolga Tanguler | Evp And Chief Commercial Officer | 29,728 | 14 Jan, 2026 |
| Akshay Vaishnaw | President | 22,774 | 07 Aug, 2023 |
| Pushkal Garg | Evp Chief R&D | 22,511 | 14 Jan, 2026 |
| Kevin Joseph Fitzgerald | Cso & Evp And Head Of Research | 21,264 | 14 Jan, 2026 |
| Michael W Bonney | 16,804 | 19 Aug, 2025 | |
| Bryan Supran | Evp And Clo And Secretary | 13,026 | 03 Oct, 2025 |
| Amy W Schulman | 11,961 | 12 May, 2025 | |
| Robert W. Hesslein | Evp And Clo And Secretary | 8,002 | 05 Mar, 2025 |
| Laurie Keating | Evp And Chief Legal Officer | 5,132 | 09 Aug, 2021 |
| Indrani Lall Franchini | Evp And Clo & Secretary | 4,133 | 29 Feb, 2024 |
| Steven M Paul | 1,000 | 05 Apr, 2022 | |
| David E I Pyott | 911 | 12 May, 2025 | |
| Margaret A Hamburg | 911 | 12 May, 2025 | |
| Dennis A Ausiello | 911 | 15 Aug, 2025 | |
| Carolyn R Bertozzi | 775 | 12 May, 2025 | |
| Colleen F Reitan | 775 | 11 Sep, 2025 | |
| Charles Elliott Sigal | 775 | 12 May, 2025 | |
| Olivier Brandicourt | 775 | 12 May, 2025 | |
| Peter N Kellogg | 775 | 12 May, 2025 | |
| Marsha Fanucci | 136 | 27 Feb, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 13 Jan, 2026 | Kevin Joseph Fitzgerald | Common Stock | D | 562 | $368.76 | 22,795 | D | S |
| 13 Jan, 2026 | Kevin Joseph Fitzgerald | Common Stock | D | 280 | $372.93 | 21,386 | D | S |
| 13 Jan, 2026 | Kevin Joseph Fitzgerald | Common Stock | D | 122 | $374.33 | 21,264 | D | S |
| 13 Jan, 2026 | Kevin Joseph Fitzgerald | Common Stock | D | 644 | $370.00 | 22,151 | D | S |
| 13 Jan, 2026 | Kevin Joseph Fitzgerald | Common Stock | D | 485 | $371.24 | 21,666 | D | S |
| 13 Jan, 2026 | Kevin Joseph Fitzgerald | Common Stock | D | 197 | $367.52 | 23,357 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 21 | $372.46 | 78,711 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 316 | $366.41 | 79,948 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 584 | $368.62 | 79,103 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 263 | $356.09 | 87,209 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 1,259 | $364.83 | 81,659 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 253 | $369.48 | 78,850 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 88 | $374.44 | 78,623 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 607 | $357.17 | 86,602 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 118 | $375.65 | 78,505 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 269 | $355.16 | 87,472 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 94 | $377.82 | 78,411 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 247 | $353.95 | 87,741 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 980 | $360.22 | 84,307 | D | S |
| 12 Jan, 2026 | Yvonne Greenstreet | Common Stock | D | 118 | $370.87 | 78,732 | D | S |