BIIB's three largest insider shareholders as of April 22, 2026 are Susan H Alexander (Evp Chief Legal Officer, 41.81K shares), Christopher Viehbacher (President And Ceo, 29.92K shares), Michael R Mcdonnell (Evp, Chief Financial Officer, 24.34K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Susan H Alexander | Evp Chief Legal Officer | 41,807 | 0 | 10 Feb, 2026 |
| Christopher Viehbacher | President And Ceo | 29,924 | 0 | 10 Feb, 2026 |
| Michael R Mcdonnell | Evp, Chief Financial Officer | 24,341 | 0 | 12 Feb, 2025 |
| Eric K Rowinsky | - | 24,339 | 0 | 18 Jun, 2025 |
| Ginger Gregory | Evp, Human Resources | 22,359 | 0 | 10 Feb, 2026 |
| Susan H Alexander | Evp Chief Legal Officer | 0 | 20,082 | 07 Nov, 2024 |
| Nicole Murphy | Head Of Pharm Ops And Tech | 19,611 | 0 | 17 Feb, 2026 |
| Alexander J Denner | - | 15,099 | 0 | 17 Jun, 2022 |
| Nancy Leaming | - | 13,763 | 0 | 02 Jul, 2021 |
| Stephen A Sherwin | - | 13,688 | 0 | 18 Jun, 2025 |
| Robin Kramer | Chief Financial Officer | 11,472 | 0 | 10 Feb, 2026 |
| Rachid Izzar | Head Of Global Product Strat. | 11,011 | 0 | 10 Feb, 2026 |
| Jesus B Mantas | - | 9,758 | 0 | 18 Jun, 2025 |
| Brian S Posner | - | 8,175 | 0 | 02 Jul, 2021 |
| Maria C Freire | - | 6,815 | 0 | 18 Jun, 2025 |
| Adam Keeney | Head Of Corporate Development | 5,881 | 0 | 10 Feb, 2026 |
| Susan Langer | - | 5,129 | 0 | 18 Jun, 2025 |
| Alphonse Galdes | Evp Pharmaceutical Oper Tech | 5,064 | 0 | 21 Jan, 2022 |
| Jane Grogan | Head Of Research | 4,058 | 0 | 10 Feb, 2026 |
| Monish D Patolawala | - | 3,710 | 0 | 18 Jun, 2025 |
| Lloyd Minor | - | 2,370 | 0 | 18 Jun, 2025 |
| Sean Godbout | Chief Accounting Officer | 1,342 | 0 | 03 Apr, 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Apr, 2026 | Sean Godbout | Common Stock | A | 181 | $0.00 | 1,396 | D | M |
| 01 Apr, 2026 | Sean Godbout | Common Stock | D | 54 | $183.78 | 1,342 | D | F |
| 01 Apr, 2026 | Sean Godbout | Restricted Stock Unit | D | 181 | $0.00 | 364 | D | M |
| 13 Feb, 2026 | Robin Kramer | Restricted Stock Unit | A | 8,450 | $0.00 | 8,450 | D | A |
| 13 Feb, 2026 | Christopher Viehbacher | Restricted Stock Unit | A | 38,015 | $0.00 | 38,015 | D | A |
| 13 Feb, 2026 | Ginger Gregory | Restricted Stock Unit | A | 8,025 | $0.00 | 8,025 | D | A |
| 13 Feb, 2026 | Adam Keeney | Restricted Stock Unit | A | 8,025 | $0.00 | 8,025 | D | A |
| 13 Feb, 2026 | Rachid Izzar | Restricted Stock Unit | A | 7,390 | $0.00 | 7,390 | D | A |
| 12 Feb, 2026 | Nicole Murphy | Common Stock | A | 3 | $195.04 | 19,611 | D | P |
| 13 Feb, 2026 | Sean Godbout | Restricted Stock Unit | A | 1,800 | $0.00 | 1,800 | D | A |
| 13 Feb, 2026 | Susan H Alexander | Restricted Stock Unit | A | 8,450 | $0.00 | 8,450 | D | A |
| 13 Feb, 2026 | Jane Grogan | Restricted Stock Unit | A | 8,450 | $0.00 | 8,450 | D | A |
| 13 Feb, 2026 | Nicole Murphy | Restricted Stock Unit | A | 10,560 | $0.00 | 10,560 | D | A |
| 06 Feb, 2026 | Ginger Gregory | Common Stock | A | 1,635 | $0.00 | 19,400 | D | M |
| 06 Feb, 2026 | Adam Keeney | Common Stock | A | 1,802 | $0.00 | 4,186 | D | M |
| 06 Feb, 2026 | Jane Grogan | Common Stock | A | 1,385 | $0.00 | 3,176 | D | M |
| 06 Feb, 2026 | Robin Kramer | Common Stock | A | 789 | $0.00 | 8,801 | D | M |
| 06 Feb, 2026 | Rachid Izzar | Common Stock | A | 2,044 | $0.00 | 8,204 | D | M |
| 06 Feb, 2026 | Sean Godbout | Common Stock | A | 257 | $0.00 | 752 | D | M |
| 06 Feb, 2026 | Christopher Viehbacher | Common Stock | A | 9,008 | $0.00 | 25,451 | D | M |