As of September 29, 2026, Biogen's top three insider holders are Michel Vounatsos (Chief Executive Officer, 67.26K shares), Susan H Alexander (Evp Chief Legal Officer, 41.81K shares), Caroline Dorsa (Director, 31.00K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michel Vounatsos | Chief Executive Officer | 67,261 | 0 | 67,261 | 15.9% | 23 Feb, 2022 |
| 2 | Susan H Alexander | Evp Chief Legal Officer | 41,807 | 0 | 41,807 | 9.9% | 10 Feb, 2026 |
| 3 | Caroline Dorsa | Director | 31,002 | 0 | 31,002 | 7.3% | 18 Jun, 2025 |
| 4 | Christopher Viehbacher | President And Ceo | 29,924 | 0 | 29,924 | 7.1% | 10 Feb, 2026 |
| 5 | Eric K Rowinsky | Director | 25,844 | 0 | 25,844 | 6.1% | 11 Jun, 2026 |
| 6 | Michael R Mcdonnell | Evp, Chief Financial Officer | 24,341 | 0 | 24,341 | 5.7% | 12 Feb, 2025 |
| 7 | Ginger Gregory | Evp, Human Resources | 22,359 | 0 | 22,359 | 5.3% | 10 Feb, 2026 |
| 8 | Nicole Murphy | Head Of Pharm Ops And Tech | 19,611 | 0 | 19,611 | 4.6% | 17 Feb, 2026 |
| 9 | Stephen A Sherwin | Director | 15,193 | 0 | 15,193 | 3.6% | 11 Jun, 2026 |
| 10 | Alexander J Denner | Director | 15,099 | 0 | 15,099 | 3.6% | 17 Jun, 2022 |
| 11 | Richard Mulligan | Director | 15,099 | 0 | 15,099 | 3.6% | 17 Jun, 2022 |
| 12 | Robin Kramer | Chief Financial Officer | 11,472 | 0 | 11,472 | 2.7% | 10 Feb, 2026 |
| 13 | Jesus B Mantas | Director | 11,263 | 0 | 11,263 | 2.7% | 11 Jun, 2026 |
| 14 | Rachid Izzar | Head Of Global Product Strat. | 11,011 | 0 | 11,011 | 2.6% | 10 Feb, 2026 |
| 15 | William A Hawkins | Director | 10,365 | 0 | 10,365 | 2.4% | 11 Jun, 2026 |
| 16 | Stelios Papadopoulos | Director | 10,095 | 0 | 10,095 | 2.4% | 17 Jun, 2022 |
| 17 | Maria C Freire | Director | 8,820 | 0 | 8,820 | 2.1% | 11 Jun, 2026 |
| 18 | Priya Singhal | Head Of Development | 8,043 | 0 | 8,043 | 1.9% | 10 Feb, 2026 |
| 19 | Chirfi Guindo | Head Of Glob Prod Strat Com | 7,364 | 0 | 7,364 | 1.7% | 23 Feb, 2022 |
| 20 | Susan Langer | Director | 6,634 | 0 | 6,634 | 1.6% | 11 Jun, 2026 |
| 21 | Adam Keeney | Head Of Corporate Development | 6,365 | 0 | 6,365 | 1.5% | 05 May, 2026 |
| 22 | Monish D Patolawala | Director | 5,215 | 0 | 5,215 | 1.2% | 11 Jun, 2026 |
| 23 | Alphonse Galdes | Evp Pharmaceutical Oper Tech | 5,064 | 0 | 5,064 | 1.2% | 21 Jan, 2022 |
| 24 | Jane Grogan | Head Of Research | 4,058 | 0 | 4,058 | 1.0% | 10 Feb, 2026 |
| 25 | Menelas N Pangalos | Director | 3,875 | 0 | 3,875 | 0.9% | 11 Jun, 2026 |
| 26 | Lloyd Minor | Director | 2,689 | 0 | 2,689 | 0.6% | 05 Aug, 2026 |
| 27 | William D /Ca/ Jones | Director | 2,145 | 0 | 2,145 | 0.5% | 17 Jun, 2022 |
| 28 | Sean Godbout | Chief Accounting Officer | 1,342 | 0 | 1,342 | 0.3% | 03 Apr, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Michael Parini | Chief Legal Officer | Acquired A | 7,405 | $0.00 | $0 | 7,405 | Direct |
| 03 Aug, 2026 | Lloyd Minor | Director | Disposed S | 593 | $203.34 | $120.58K | 3,282 | Direct |
| 04 Aug, 2026 | Lloyd Minor | Director | Disposed S | 593 | $200.96 | $119.17K | 2,689 | Direct |
| 09 Jun, 2026 | Susan Langer | Director | Acquired A | 1,505 | $0.00 | $0 | 6,634 | Direct |
| 09 Jun, 2026 | Eric K Rowinsky | Director | Acquired A | 1,505 | $0.00 | $0 | 25,844 | Direct |
| 09 Jun, 2026 | Menelas N Pangalos | Director | Acquired M | 2,370 | $0.00 | $0 | 2,370 | Direct |
| 09 Jun, 2026 | Stephen A Sherwin | Director | Acquired A | 1,505 | $0.00 | $0 | 15,193 | Direct |
| 09 Jun, 2026 | Lloyd Minor | Director | Acquired A | 1,505 | $0.00 | $0 | 3,875 | Direct |
| 09 Jun, 2026 | William A Hawkins | Director | Acquired A | 1,505 | $0.00 | $0 | 10,365 | Direct |
| 09 Jun, 2026 | Monish D Patolawala | Director | Acquired A | 1,505 | $0.00 | $0 | 5,215 | Direct |
| 09 Jun, 2026 | Jesus B Mantas | Director | Acquired A | 1,505 | $0.00 | $0 | 11,263 | Direct |
| 09 Jun, 2026 | Maria C Freire | Director | Acquired A | 2,005 | $0.00 | $0 | 8,820 | Direct |
| 09 Jun, 2026 | Menelas N Pangalos | Director | Acquired A | 1,505 | $0.00 | $0 | 3,875 | Direct |
| 09 Jun, 2026 | Menelas N Pangalos | Director | Disposed M | 2,370 | $0.00 | $0 | 0 | Direct |
| 01 May, 2026 | Adam Keeney | Head Of Corporate Development | Acquired M | 939 | $0.00 | $0 | 6,820 | Direct |
| 01 May, 2026 | Adam Keeney | Head Of Corporate Development | Disposed F | 455 | $187.06 | $85.11K | 6,365 | Direct |
| 01 May, 2026 | Adam Keeney | Head Of Corporate Development | Disposed M | 939 | $0.00 | $0 | 0 | Direct |
| 01 Apr, 2026 | Sean Godbout | Chief Accounting Officer | Acquired M | 181 | $0.00 | $0 | 1,396 | Direct |
| 01 Apr, 2026 | Sean Godbout | Chief Accounting Officer | Disposed F | 54 | $183.78 | $9.92K | 1,342 | Direct |
| 01 Apr, 2026 | Sean Godbout | Chief Accounting Officer | Disposed M | 181 | $0.00 | $0 | 364 | Direct |