SEC INSIDER TRANSACTIONS

BIOGEN INC. (BIIB) Insider Transactions

Explore official ownership filings, with every record linked to its source.

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BIIB · BIOGEN INC.

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Roles: director,officer,ten_percent_owner,otherOwner nameOfficer titleOwnership: D, I, unknownoriginal or amendedTransaction fromTransaction throughFiled fromFiled throughMinimum quantityMaximum quantityMinimum priceMaximum priceMinimum calculated valueMaximum calculated valueResults per page (1–100)

OR within codes/roles; AND between categories. Roles apply to buyers and sellers. Owner predicates match the same owner. Missing values fail numeric/date filters. Value is quantity × reported price for non-derivative rows only; derivative values are unknown. Amendments stay separate; joint owners do not duplicate rows.

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Stale snapshot · Covered: filings 2026-10-15 to 2026-11-13 · 1 filings · fetched 2026-11-13T16:57:13Z

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Recent reported activity

0purchase rows on this page

0sale rows on this page

3matching filing rows

Purchases and sales count original non-derivative P and S rows. Awards, gifts, exercises, derivatives and amendments are shown separately and are not described as market purchases.

Transaction / filed	Reporting owner(s)	Code / security	Quantity	Price as filed	Ownership	Source
2026-10-30Filed 2026-11-02	Grogan JaneOfficer · Head of Research Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of November 1, 2023. Power of Attorney is attached hereto as Exhibit 24. References: F1	M Exercise / conversionRestricted Stock Unit · Derivative	695D	0	Direct	Form 4 ↗0000875045-26-000098
2026-10-30Filed 2026-11-02	Grogan JaneOfficer · Head of Research Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of November 1, 2023. Power of Attorney is attached hereto as Exhibit 24. References:	F WithholdingCommon Stock · Non-derivative	345D	253.62	Direct	Form 4 ↗0000875045-26-000098
2026-10-30Filed 2026-11-02	Grogan JaneOfficer · Head of Research Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of November 1, 2023. Power of Attorney is attached hereto as Exhibit 24. References:	M Exercise / conversionCommon Stock · Non-derivative	695A	0	Direct	Form 4 ↗0000875045-26-000098

Imported instruments only. Joint owners do not multiply transactions. Amendments are separate filing rows, not additional trades. No aggregate trade totals are implied.