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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| BIIB | Singhal Priya | Head of Development | Feb 09 '26 | Sale | 199.83 | 2,660 | 531,548 | 8,043 | Feb 10 |
| BIIB | Singhal Priya | Head of Development | Feb 06 '26 | Option Exercise | 0.00 | 6,900 | 0 | 12,115 | Feb 10 |
| BIIB | Singhal Priya | Head of Development | Feb 02 '26 | Sale | 179.30 | 748 | 134,116 | 6,271 | Feb 03 |
| BIIB | Singhal Priya | Head of Development | Jan 30 '26 | Option Exercise | 0.00 | 1,829 | 0 | 7,601 | Feb 03 |
| BIIB | Singhal Priya | Head of Development | Sep 02 '25 | Sale | 133.55 | 517 | 69,045 | 5,772 | Sep 02 |
| BIIB | Singhal Priya | Head of Development | Aug 29 '25 | Option Exercise | 0.00 | 1,669 | 0 | 7,096 | Sep 02 |
| BIIB | Singhal Priya | Head of Development | May 19 '25 | Sale | 126.25 | 3,806 | 480,508 | 5,427 | May 20 |
| BIIB | Singhal Priya | Head of Development | Feb 10 '25 | Option Exercise | 0.00 | 1,212 | 0 | 9,423 | Feb 12 |
| BIIB | Singhal Priya | Head of Development | Feb 07 '25 | Option Exercise | 0.00 | 2,216 | 0 | 8,892 | Feb 10 |
| BIIB | Singhal Priya | Head of Development | Jan 31 '25 | Option Exercise | 0.00 | 1,828 | 0 | 7,254 | Feb 03 |
| BIIB | Singhal Priya | Head of Development | Dec 09 '24 | Sale | 157.21 | 110 | 17,293 | 5,426 | Dec 09 |
| BIIB | Singhal Priya | Head of Development | Dec 06 '24 | Option Exercise | 0.00 | 426 | 0 | 5,742 | Dec 09 |
| BIIB | Singhal Priya | Head of Development | Sep 03 '24 | Sale | 204.22 | 431 | 88,019 | 5,316 | Sep 05 |
| BIIB | Singhal Priya | Head of Development | Aug 30 '24 | Option Exercise | 0.00 | 1,668 | 0 | 6,554 | Sep 05 |
| BIIB | Singhal Priya | Head of Development | Apr 02 '24 | Sale | 213.09 | 93 | 19,817 | 4,886 | Apr 03 |
| BIIB | Singhal Priya | Head of Development | Feb 22 '24 | Sale | 221.23 | 262 | 57,962 | 4,886 | Feb 26 |
| BIIB | Singhal Priya | Head of Development | Feb 16 '24 | Option Exercise | 0.00 | 1,208 | 0 | 5,429 | Feb 21 |
| BIIB | Singhal Priya | Head of Development | Feb 16 '24 | Sale | 221.49 | 108 | 23,921 | 5,148 | Feb 21 |
| BIIB | Singhal Priya | Head of Development | Feb 12 '24 | Sale | 239.45 | 419 | 100,330 | 4,516 | Feb 13 |
| BIIB | Singhal Priya | Head of Development | Feb 09 '24 | Option Exercise | 0.00 | 1,212 | 0 | 5,309 | Feb 13 |
| BIIB | Singhal Priya | Head of Development | Feb 02 '24 | Sale | 245.93 | 634 | 155,920 | 4,097 | Feb 05 |
| BIIB | Singhal Priya | Head of Development | Feb 01 '24 | Option Exercise | 0.00 | 1,828 | 0 | 5,292 | Feb 05 |
| BIIB | Singhal Priya | Head of Development | Dec 11 '23 | Sale | 248.00 | 110 | 27,280 | 3,464 | Dec 12 |
| BIIB | Singhal Priya | Head of Development | Dec 08 '23 | Option Exercise | 0.00 | 426 | 0 | 3,780 | Dec 12 |
| BIIB | Singhal Priya | Head of Development | Sep 05 '23 | Sale | 269.43 | 431 | 116,124 | 3,354 | Sep 06 |
| BIIB | Singhal Priya | Head of Development | Sep 01 '23 | Option Exercise | 0.00 | 1,668 | 0 | 4,592 | Sep 06 |
| BIIB | Singhal Priya | Head of Development | Jul 03 '23 | Sale | 282.87 | 81 | 22,912 | 2,924 | Jul 05 |
| BIIB | Singhal Priya | Head of Development | Jun 30 '23 | Option Exercise | 0.00 | 315 | 0 | 3,158 | Jul 05 |
| BIIB | Singhal Priya | Head of Development | Apr 04 '23 | Sale | 277.11 | 91 | 25,217 | 2,843 | Apr 06 |
| BIIB | Singhal Priya | Head of Development | Mar 28 '23 | Sale | 270.06 | 568 | 153,394 | 2,842 | Mar 30 |
| BIIB | Singhal Priya | Head of Development | Mar 02 '23 | Option Exercise | 0.00 | 297 | 0 | 3,554 | Mar 06 |
| BIIB | Singhal Priya | Head of Development | Feb 17 '23 | Option Exercise | 0.00 | 460 | 0 | 3,951 | Feb 22 |
| BIIB | Singhal Priya | Head of Development | Feb 10 '23 | Option Exercise | 0.00 | 1,211 | 0 | 3,863 | Feb 14 |