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BIIB

Biogen Inc. SEC filings

Biological Products, (No Diagnostic Substances) · Nasdaq · Incorporated in DE

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Filing history

2026-11-02

Insider trade 4

2026-10-28

Quarterly report 10-Q

2026-10-28

Current report 8-K

Earnings results

2026-10-05

Insider trade 4

2026-09-03

Insider trade 4

2026-08-12

New insider's holdings 3

2026-08-06

Passive 5%+ stake update SCHEDULE 13G/A

2026-08-05

Insider trade 4

2026-08-04

Planned insider sale 144

2026-08-03

Planned insider sale 144

2026-07-29

Quarterly report 10-Q

2026-07-29

Current report 8-K

Earnings results

2026-07-01

Current report 8-K

Earnings results

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-11

Insider trade 4

2026-06-10

Current report 8-K

Shareholder vote

2026-06-10

Current report (amended) 8-K/A

2026-06-05

Passive 5%+ stake update SCHEDULE 13G/A

2026-05-14

5%+ stake update (13D) SCHEDULE 13D/A

2026-05-14

Current report 8-K

Material agreementAcquisition/sale completedNew debtReg FD disclosure

2026-05-14

SC TO-T/A SC TO-T/A

2026-05-12

SC TO-T/A SC TO-T/A

2026-05-06

SC TO-T/A SC TO-T/A

2026-05-06

Passive 5%+ stake update SCHEDULE 13G/A

2026-05-05

Insider trade 4

2026-04-29

Passive 5%+ stake SCHEDULE 13G

2026-04-29

Quarterly report 10-Q

2026-04-29

Current report 8-K

Earnings results

2026-04-28

Annual report to shareholders ARS

2026-04-28

Proxy material DEFA14A

2026-04-28

Proxy statement (shareholder vote) DEF 14A

2026-04-14

SC TO-T SC TO-T

2026-04-07

SC TO-C SC TO-C