BIIB's three largest insider shareholders as of June 02, 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 |
|---|---|---|---|---|
| Stephen A Sherwin | - | 13,688 | 0 | 18 Jun, 2025 |
| William A Hawkins | - | 8,860 | 0 | 18 Jun, 2025 |
| Michael R Mcdonnell | Evp, Chief Financial Officer | 24,341 | 0 | 12 Feb, 2025 |
| Susan H Alexander | Evp Chief Legal Officer | 41,807 | 0 | 10 Feb, 2026 |
| Nancy Leaming | - | 13,763 | 0 | 02 Jul, 2021 |
| Eric K Rowinsky | - | 24,339 | 0 | 18 Jun, 2025 |
| Alexander J Denner | - | 15,099 | 0 | 17 Jun, 2022 |
| Brian S Posner | - | 8,175 | 0 | 02 Jul, 2021 |
| Richard Mulligan | - | 15,099 | 0 | 17 Jun, 2022 |
| Ginger Gregory | Evp, Human Resources | 22,359 | 0 | 10 Feb, 2026 |
| Maria C Freire | - | 6,815 | 0 | 18 Jun, 2025 |
| Robin Kramer | Chief Financial Officer | 11,472 | 0 | 10 Feb, 2026 |
| Christopher Viehbacher | President And Ceo | 29,924 | 0 | 10 Feb, 2026 |
| Jesus B Mantas | - | 9,758 | 0 | 18 Jun, 2025 |
| Alphonse Galdes | Evp Pharmaceutical Oper Tech | 5,064 | 0 | 21 Jan, 2022 |
| Monish D Patolawala | - | 3,710 | 0 | 18 Jun, 2025 |
| Rachid Izzar | Head Of Global Product Strat. | 11,011 | 0 | 10 Feb, 2026 |
| Nicole Murphy | Head Of Pharm Ops And Tech | 19,611 | 0 | 17 Feb, 2026 |
| Adam Keeney | Head Of Corporate Development | 5,881 | 0 | 10 Feb, 2026 |
| Susan Langer | - | 5,129 | 0 | 18 Jun, 2025 |
| Jane Grogan | Head Of Research | 4,058 | 0 | 10 Feb, 2026 |
| 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 | A | 181 | $0.00 | 1,396 | D | M |
| 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 | Common Stock | D | 54 | $183.78 | 1,342 | D | F |
| 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 |
| 01 Apr, 2026 | Sean Godbout | Restricted Stock Unit | D | 181 | $0.00 | 364 | D | M |
| 01 Apr, 2026 | Sean Godbout | Restricted Stock Unit | D | 181 | $0.00 | 364 | D | M |
| 13 Feb, 2026 | Christopher Viehbacher | Restricted Stock Unit | A | 38,015 | $0.00 | 38,015 | D | A |
| 13 Feb, 2026 | Christopher Viehbacher | Restricted Stock Unit | A | 38,015 | $0.00 | 38,015 | D | A |
| 13 Feb, 2026 | Robin Kramer | Restricted Stock Unit | A | 8,450 | $0.00 | 8,450 | D | A |
| 13 Feb, 2026 | Ginger Gregory | Restricted Stock Unit | A | 8,025 | $0.00 | 8,025 | D | A |
| 13 Feb, 2026 | Ginger Gregory | Restricted Stock Unit | A | 8,025 | $0.00 | 8,025 | D | A |
| 13 Feb, 2026 | Jane Grogan | Restricted Stock Unit | A | 8,450 | $0.00 | 8,450 | D | A |
| 13 Feb, 2026 | Sean Godbout | Restricted Stock Unit | A | 1,800 | $0.00 | 1,800 | D | A |
| 13 Feb, 2026 | Adam Keeney | Restricted Stock Unit | A | 8,025 | $0.00 | 8,025 | D | A |
| 12 Feb, 2026 | Nicole Murphy | Common Stock | A | 3 | $195.04 | 19,611 | D | P |
| 13 Feb, 2026 | Rachid Izzar | Restricted Stock Unit | A | 7,390 | $0.00 | 7,390 | D | A |
| 13 Feb, 2026 | Jane Grogan | Restricted Stock Unit | A | 8,450 | $0.00 | 8,450 | D | A |