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 2026-05-14 to 2026-11-13 · 14 filings · fetched 2026-11-13T16:57:13Z

Recent reported activity

0purchase rows on this page

2sale rows on this page

21matching 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
2026-10-02Filed 2026-10-05	Godbout SeanOfficer · Chief Accounting Officer Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Includes 98.3178 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2026, 6/30/2026, and 9/30/2026. F2 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 1, 2026. F3 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 2, 2023. Power of Attorney is attached hereto as Exhibit 24. References: F3	M Exercise / conversionRestricted Stock Unit · Derivative	27D	0	Direct	Form 4 ↗0000875045-26-000084
2026-10-02Filed 2026-10-05	Godbout SeanOfficer · Chief Accounting Officer Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Includes 98.3178 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2026, 6/30/2026, and 9/30/2026. F2 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 1, 2026. F3 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 2, 2023. Power of Attorney is attached hereto as Exhibit 24. References:	F WithholdingCommon Stock · Non-derivative	8D	219.88	Direct	Form 4 ↗0000875045-26-000084
2026-10-02Filed 2026-10-05	Godbout SeanOfficer · Chief Accounting Officer Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Includes 98.3178 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2026, 6/30/2026, and 9/30/2026. F2 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 1, 2026. F3 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 2, 2023. Power of Attorney is attached hereto as Exhibit 24. References: F1	M Exercise / conversionCommon Stock · Non-derivative	27A	0	Direct	Form 4 ↗0000875045-26-000084
2026-10-01Filed 2026-10-05	Godbout SeanOfficer · Chief Accounting Officer Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Includes 98.3178 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2026, 6/30/2026, and 9/30/2026. F2 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 1, 2026. F3 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 2, 2023. Power of Attorney is attached hereto as Exhibit 24. References: F2	A Award / grantRestricted Stock Unit · Derivative	985A	0	Direct	Form 4 ↗0000875045-26-000084
2026-09-01Filed 2026-09-03	Parini MichaelOfficer · Chief Legal Officer 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 September 1, 2026. References: F1	A Award / grantRestricted Stock Unit · Derivative	7,405A	0	Direct	Form 4 ↗0000875045-26-000082
2026-08-04Filed 2026-08-05	Minor LloydDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. References:	S Sale (market/private)Common Stock · Non-derivative	593D	200.96	Direct	Form 4 ↗0000875045-26-000076
2026-08-03Filed 2026-08-05	Minor LloydDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. References:	S Sale (market/private)Common Stock · Non-derivative	593D	203.34	Direct	Form 4 ↗0000875045-26-000076
2026-06-09Filed 2026-06-11	HAWKINS WILLIAM ADirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000065
2026-06-09Filed 2026-06-11	SHERWIN STEPHEN ADirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000064
2026-06-09Filed 2026-06-11	Rowinsky Eric KDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000063
2026-06-09Filed 2026-06-11	Mantas Jesus BDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000062
2026-06-09Filed 2026-06-11	LANGER SUSANDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000060
2026-06-09Filed 2026-06-11	Patolawala Monish DDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000059
2026-06-09Filed 2026-06-11	Pangalos Menelas NDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. F2 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 17, 2025. References: F2	M Exercise / conversionRestricted Stock Unit · Derivative	2,370D	0	Direct	Form 4 ↗0000875045-26-000055
2026-06-09Filed 2026-06-11	Pangalos Menelas NDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. F2 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 17, 2025. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000055
2026-06-09Filed 2026-06-11	Pangalos Menelas NDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. F2 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 17, 2025. References:	M Exercise / conversionCommon Stock · Non-derivative	2,370A	0	Direct	Form 4 ↗0000875045-26-000055
2026-06-09Filed 2026-06-11	Minor LloydDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	1,505A	0	Direct	Form 4 ↗0000875045-26-000054
2026-06-09Filed 2026-06-11	Freire Maria CDirector Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 9, 2026. References: F1	A Award / grantCommon Stock · Non-derivative	2,005A	0	Direct	Form 4 ↗0000875045-26-000052

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