BIIB
Biogen Inc.Company with tickers: BIIB
CIK
875045
CUSIP
09062X103
Shares Outstanding
147,637,117
13F Activity (30d)
690 filings
655 filers
Notices of intent to sell restricted or control shares, filed with the SEC on Form 144 by insiders and affiliates. A Form 144 signals a planned sale — it does not confirm the shares were actually sold.
| Filed | Seller | Relationship | Shares | Approx. Sale | Broker |
|---|---|---|---|---|---|
| 2026-02-09 | Singhal Priya | Officer | 2,660 | 2026-02-09 | Fidelity Brokerage Services LLC |
| 2026-02-02 | Singhal Priya | Officer | 748 | 2026-02-02 | Fidelity Brokerage Services LLC |
| 2025-09-02 | Singhal Priya | Officer | 517 | 2025-09-02 | Fidelity Brokerage Services LLC |
| 2025-07-08 | Izzar Rachid | Officer | 2,223 | 2025-07-08 | Fidelity Brokerage Services LLC |
| 2025-05-19 | Singhal Priya | Officer | 3,806 | 2025-05-19 | Fidelity Brokerage Services LLC |
| 2025-03-07 | STEPHEN A SHERWIN | Director | 8,760 | 2025-03-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-12-09 | Singhal Priya | Officer | 110 | 2024-12-09 | Fidelity Brokerage Services LLC |
| 2024-09-03 | Singhal Priya | Officer | 431 | 2024-09-03 | Fidelity Brokerage Services LLC |
| 2024-04-02 | Singhal Priya | Officer | 93 | 2024-04-02 | Fidelity Brokerage Services LLC |
| 2024-02-22 | Singhal Priya | Officer | 262 | 2024-02-22 | Fidelity Brokerage Services LLC |
| 2024-02-21 | Singhal Priya | Officer | 108 | 2024-02-21 | Fidelity Brokerage Services LLC |
| 2024-02-12 | Singhal Priya | Officer | 419 | 2024-02-12 | Fidelity Brokerage Services LLC |
| 2024-02-02 | Singhal Priya | Officer | 634 | 2024-02-02 | Fidelity Brokerage Services LLC |
| 2023-12-11 | Singhal Priya | Officer | 110 | 2023-12-11 | Fidelity Brokerage Services LLC |
| 2023-09-05 | Singhal Priya | Officer | 431 | 2023-09-05 | Fidelity Brokerage Services LLC |
| 2023-07-03 | Singhal Priya | Officer | 81 | 2023-07-03 | Fidelity Brokerage Services LLC |
| 2023-04-28 | Gregory Ginger | Officer | 2,681 | 2023-04-28 | Fidelity Brokerage Services LLC |
| 2023-04-04 | Singhal Priya | Officer | 91 | 2023-04-04 | Fidelity Brokerage Services LLC |
| 2023-03-28 | Singhal Priya | Officer | 568 | 2023-03-28 | Fidelity Brokerage Services LLC |