| BIIB | | BIOGEN INC. | Christopher Viehbacher | President and CEO | Dec 01, 2025 | Tax Payment (Shares) | $177.78 | 3,404 | 605,163 | 16,443 | Dec 03, 2025, 04:42 PM |
| BIIB | | BIOGEN INC. | Christopher Viehbacher | President and CEO | Dec 01, 2025 | Option/RSU Exercise | - | 7,040 | - | 19,847 | Dec 03, 2025, 04:42 PM |
| BIIB | | BIOGEN INC. | Jane Grogan | Head of Research | Oct 31, 2025 | Option/RSU Exercise | - | 695 | - | 2,128 | Nov 04, 2025, 04:12 PM |
| BIIB | | BIOGEN INC. | Jane Grogan | Head of Research | Oct 31, 2025 | Tax Payment (Shares) | $154.27 | 337 | 51,989 | 1,791 | Nov 04, 2025, 04:12 PM |
| BIIB | | BIOGEN INC. | Sean Godbout | Chief Accounting Officer | Oct 02, 2025 | Tax Payment (Shares) | $155.25 | 8 | 1,242 | 495 | Oct 06, 2025, 01:00 PM |
| BIIB | | BIOGEN INC. | Sean Godbout | Chief Accounting Officer | Oct 02, 2025 | Option/RSU Exercise | - | 26 | - | 503 | Oct 06, 2025, 01:00 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Aug 29, 2025 | Tax Payment (Shares) | $132.22 | 807 | 106,702 | 6,289 | Sep 02, 2025, 05:56 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Aug 29, 2025 | Option/RSU Exercise | - | 1,669 | - | 7,096 | Sep 02, 2025, 05:56 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Sep 02, 2025 | Sale | $133.55 | 517 | 69,045 | 5,772 | Sep 02, 2025, 05:56 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Jul 08, 2025 | Sale | $135.00 | 2,223 | 300,105 | 6,330 | Jul 16, 2025, 05:55 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | May 19, 2025 | Sale | $126.25 | 3,806 | 480,508 | 5,427 | May 20, 2025, 04:05 PM |
| BIIB | | BIOGEN INC. | Adam Keeney | Head of Corporate Development | May 01, 2025 | Tax Payment (Shares) | $120.93 | 454 | 54,902 | 2,384 | May 05, 2025, 04:19 PM |
| BIIB | | BIOGEN INC. | Adam Keeney | Head of Corporate Development | May 01, 2025 | Option/RSU Exercise | - | 938 | - | 2,838 | May 05, 2025, 04:19 PM |
| BIIB | | BIOGEN INC. | Caroline Dorsa | Director | May 02, 2025 | Buy | $122.72 | 1,235 | 151,559 | 27,842 | May 05, 2025, 04:17 PM |
| BIIB | | BIOGEN INC. | Stephen A. Sherwin | Director | Mar 07, 2025 | Sale | $150.02 | 8,760 | 1,314,142 | 11,318 | Mar 10, 2025, 04:09 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 357 | 50,887 | 9,066 | Feb 12, 2025, 05:48 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 10, 2025 | Option/RSU Exercise | - | 1,212 | - | 9,423 | Feb 12, 2025, 05:48 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 670 | 95,502 | 14,055 | Feb 12, 2025, 05:47 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 10, 2025 | Option/RSU Exercise | - | 2,272 | - | 14,725 | Feb 12, 2025, 05:47 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 1,371 | 195,422 | 24,341 | Feb 12, 2025, 05:46 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 10, 2025 | Option/RSU Exercise | - | 3,257 | - | 25,712 | Feb 12, 2025, 05:46 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 245 | 34,922 | 8,012 | Feb 12, 2025, 05:44 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 10, 2025 | Option/RSU Exercise | - | 834 | - | 8,257 | Feb 12, 2025, 05:44 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 634 | 90,370 | 17,598 | Feb 12, 2025, 05:43 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 10, 2025 | Option/RSU Exercise | - | 2,159 | - | 18,232 | Feb 12, 2025, 05:43 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 807 | 115,030 | 36,265 | Feb 12, 2025, 05:42 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 10, 2025 | Option/RSU Exercise | - | 2,575 | - | 37,072 | Feb 12, 2025, 05:42 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 10, 2025 | Tax Payment (Shares) | $142.54 | 445 | 63,430 | 8,553 | Feb 12, 2025, 05:40 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 10, 2025 | Option/RSU Exercise | - | 1,515 | - | 8,998 | Feb 12, 2025, 05:40 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 1,165 | 164,673 | 6,624 | Feb 11, 2025, 09:52 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 07, 2025 | Option/RSU Exercise | - | 3,844 | - | 7,860 | Feb 11, 2025, 09:52 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 1,502 | 212,308 | 22,455 | Feb 10, 2025, 06:59 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 07, 2025 | Option/RSU Exercise | - | 4,551 | - | 23,171 | Feb 10, 2025, 06:59 PM |
| BIIB | | BIOGEN INC. | Christopher Viehbacher | President and CEO | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 3,201 | 452,461 | 12,807 | Feb 10, 2025, 06:55 PM |
| BIIB | | BIOGEN INC. | Christopher Viehbacher | President and CEO | Feb 07, 2025 | Option/RSU Exercise | - | 9,008 | - | 16,008 | Feb 10, 2025, 06:55 PM |
| BIIB | | BIOGEN INC. | Jane Grogan | Head of Research | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 443 | 62,618 | 1,433 | Feb 10, 2025, 06:52 PM |
| BIIB | | BIOGEN INC. | Jane Grogan | Head of Research | Feb 07, 2025 | Option/RSU Exercise | - | 1,385 | - | 1,876 | Feb 10, 2025, 06:52 PM |
| BIIB | | BIOGEN INC. | Adam Keeney | Head of Corporate Development | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 563 | 79,580 | 1,900 | Feb 10, 2025, 06:51 PM |
| BIIB | | BIOGEN INC. | Adam Keeney | Head of Corporate Development | Feb 07, 2025 | Option/RSU Exercise | - | 1,801 | - | 2,463 | Feb 10, 2025, 06:51 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 07, 2025 | Option/RSU Exercise | - | 1,491 | - | 7,667 | Feb 10, 2025, 06:48 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 476 | 67,283 | 7,423 | Feb 10, 2025, 06:48 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 1,223 | 172,871 | 12,453 | Feb 10, 2025, 06:47 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 07, 2025 | Option/RSU Exercise | - | 4,042 | - | 13,056 | Feb 10, 2025, 06:47 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 681 | 96,259 | 8,211 | Feb 10, 2025, 06:45 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 07, 2025 | Option/RSU Exercise | - | 2,216 | - | 8,892 | Feb 10, 2025, 06:45 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 1,040 | 147,004 | 16,073 | Feb 10, 2025, 06:44 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 07, 2025 | Option/RSU Exercise | - | 3,436 | - | 16,633 | Feb 10, 2025, 06:44 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 07, 2025 | Tax Payment (Shares) | $141.35 | 1,234 | 174,426 | 34,497 | Feb 10, 2025, 06:42 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 07, 2025 | Option/RSU Exercise | - | 4,130 | - | 35,088 | Feb 10, 2025, 06:42 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Jan 31, 2025 | Tax Payment (Shares) | $143.93 | 578 | 83,192 | 6,676 | Feb 03, 2025, 06:02 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Jan 31, 2025 | Option/RSU Exercise | - | 1,828 | - | 7,254 | Feb 03, 2025, 06:02 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Dec 06, 2024 | Tax Payment (Shares) | $157.78 | 206 | 32,503 | 5,536 | Dec 09, 2024, 04:57 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Dec 06, 2024 | Option/RSU Exercise | - | 426 | - | 5,742 | Dec 09, 2024, 04:57 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Dec 09, 2024 | Sale | $157.21 | 110 | 17,293 | 5,426 | Dec 09, 2024, 04:57 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Dec 06, 2024 | Tax Payment (Shares) | $157.78 | 170 | 26,823 | 6,408 | Dec 09, 2024, 04:56 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Dec 06, 2024 | Option/RSU Exercise | - | 351 | - | 6,578 | Dec 09, 2024, 04:56 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Nov 05, 2024 | Gift | - | 20,082 | - | 31,601 | Nov 07, 2024, 04:23 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Nov 05, 2024 | Gift | - | 20,082 | - | 20,082 | Nov 07, 2024, 04:23 PM |
| BIIB | | BIOGEN INC. | Jane Grogan | Head of Research | Nov 01, 2024 | Tax Payment (Shares) | $173.79 | 204 | 35,453 | 491 | Nov 04, 2024, 04:39 PM |
| BIIB | | BIOGEN INC. | Jane Grogan | Head of Research | Nov 01, 2024 | Option/RSU Exercise | - | 695 | - | 695 | Nov 04, 2024, 04:39 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Sep 03, 2024 | Sale | $204.22 | 431 | 88,019 | 5,316 | Sep 05, 2024, 06:00 AM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Aug 30, 2024 | Tax Payment (Shares) | $204.76 | 807 | 165,241 | 5,747 | Sep 05, 2024, 06:00 AM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Aug 30, 2024 | Option/RSU Exercise | - | 1,668 | - | 6,554 | Sep 05, 2024, 06:00 AM |
| BIIB | | BIOGEN INC. | Adam Keeney | Head of Corporate Development | May 01, 2024 | Tax Payment (Shares) | $216.13 | 276 | 59,652 | 662 | May 03, 2024, 08:00 PM |
| BIIB | | BIOGEN INC. | Adam Keeney | Head of Corporate Development | May 01, 2024 | Option/RSU Exercise | - | 938 | - | 938 | May 03, 2024, 08:00 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Apr 02, 2024 | Sale | $213.09 | 93 | 19,817 | 4,886 | Apr 03, 2024, 08:24 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Apr 01, 2024 | Option/RSU Exercise | - | 240 | - | 9,751 | Apr 03, 2024, 08:11 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Apr 01, 2024 | Tax Payment (Shares) | $214.83 | 117 | 25,135 | 9,634 | Apr 03, 2024, 08:11 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 22, 2024 | Sale | $221.23 | 262 | 57,962 | 4,886 | Feb 26, 2024, 07:54 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 2,437 | 533,898 | 51,683 | Feb 21, 2024, 09:39 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 16, 2024 | Option/RSU Exercise | - | 5,037 | - | 52,506 | Feb 21, 2024, 09:39 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 16, 2024 | Option/RSU Exercise | - | 4,704 | - | 14,341 | Feb 21, 2024, 09:36 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 2,264 | 495,997 | 13,584 | Feb 21, 2024, 09:36 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 952 | 208,564 | 9,701 | Feb 21, 2024, 09:33 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 16, 2024 | Option/RSU Exercise | - | 2,017 | - | 10,014 | Feb 21, 2024, 09:33 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 396 | 86,756 | 6,227 | Feb 21, 2024, 09:31 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 16, 2024 | Option/RSU Exercise | - | 1,345 | - | 6,354 | Feb 21, 2024, 09:31 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 3,438 | 753,197 | 19,406 | Feb 21, 2024, 09:29 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 16, 2024 | Option/RSU Exercise | - | 6,720 | - | 20,692 | Feb 21, 2024, 09:29 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 610 | 133,639 | 9,418 | Feb 21, 2024, 09:28 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 16, 2024 | Option/RSU Exercise | - | 1,260 | - | 9,624 | Feb 21, 2024, 09:28 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 16, 2024 | Sale | $221.49 | 108 | 23,921 | 5,148 | Feb 21, 2024, 09:27 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 16, 2024 | Tax Payment (Shares) | $219.08 | 468 | 102,529 | 5,256 | Feb 21, 2024, 09:27 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 16, 2024 | Option/RSU Exercise | - | 1,208 | - | 5,429 | Feb 21, 2024, 09:27 PM |
| BIIB | | BIOGEN INC. | Eric K. Rowinsky | Director | Feb 15, 2024 | Buy | $222.54 | 455 | 101,256 | 20,629 | Feb 20, 2024, 09:13 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 634 | 152,781 | 11,144 | Feb 13, 2024, 06:14 PM |
| BIIB | | BIOGEN INC. | Ginger Gregory | EVP, Human Resources | Feb 09, 2024 | Option/RSU Exercise | - | 2,158 | - | 11,778 | Feb 13, 2024, 06:14 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 374 | 90,127 | 4,935 | Feb 13, 2024, 06:06 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 09, 2024 | Option/RSU Exercise | - | 1,212 | - | 5,309 | Feb 13, 2024, 06:06 PM |
| BIIB | | BIOGEN INC. | Priya Singhal | Head of Development | Feb 12, 2024 | Sale | $239.45 | 419 | 100,330 | 4,516 | Feb 13, 2024, 06:06 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 09, 2024 | Option/RSU Exercise | - | 2,272 | - | 9,529 | Feb 13, 2024, 06:04 PM |
| BIIB | | BIOGEN INC. | Nicole Murphy | Head of Pharm Ops and Tech | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 761 | 183,386 | 8,768 | Feb 13, 2024, 06:04 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 1,431 | 344,842 | 16,124 | Feb 13, 2024, 06:03 PM |
| BIIB | | BIOGEN INC. | Michael R. Mcdonnell | EVP, Chief Financial Officer | Feb 09, 2024 | Option/RSU Exercise | - | 3,257 | - | 17,555 | Feb 13, 2024, 06:03 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 245 | 59,040 | 5,278 | Feb 13, 2024, 06:01 PM |
| BIIB | | BIOGEN INC. | Robin Kramer | Chief Accounting Officer | Feb 09, 2024 | Option/RSU Exercise | - | 833 | - | 5,523 | Feb 13, 2024, 06:01 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 445 | 107,236 | 8,636 | Feb 13, 2024, 06:00 PM |
| BIIB | | BIOGEN INC. | Rachid Izzar | Head of Global Product Strat. | Feb 09, 2024 | Option/RSU Exercise | - | 1,515 | - | 9,081 | Feb 13, 2024, 06:00 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 09, 2024 | Tax Payment (Shares) | $240.98 | 938 | 226,039 | 49,083 | Feb 13, 2024, 05:56 PM |
| BIIB | | BIOGEN INC. | Susan H. Alexander | EVP Chief Legal Officer | Feb 09, 2024 | Option/RSU Exercise | - | 2,575 | - | 50,021 | Feb 13, 2024, 05:56 PM |