Tapewire

Nasdaq · USD

BIIB

BIOGEN INC.

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Tapewire entity
1675
SEC CIK
0000875045
Parsed reports
468

Last 12 months

Inside the activity.

1 purchase rows · 4 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 202500
Dec 202500
Jan 202600
Feb 202612
Mar 202600
Apr 202600
May 202600
Jun 202600
Jul 202600
Aug 202602
Sep 202600
Oct 202600

Latest available

Insider transactions

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
February 06, 2026 Filed Feb 10, 2026 21:56 UTC
Godbout SeanChief Accounting Officer
Exercise / conversionCommon Stock 517 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000016 · form4.xml · nonDerivative · entry 5

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,394.6667

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:56 UTC
Godbout SeanChief Accounting Officer
Tax withholdingCommon Stock 103 $201.18 $20,721.54
Disclosure

SEC source: 0000875045-26-000016 · form4.xml · nonDerivative · entry 4

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 877.6667

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:56 UTC
Godbout SeanChief Accounting Officer
Exercise / conversionCommon Stock 305 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000016 · form4.xml · nonDerivative · entry 3

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 980.6667

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:56 UTC
Godbout SeanChief Accounting Officer
Tax withholdingCommon Stock 76 $201.18 $15,289.68
Disclosure

SEC source: 0000875045-26-000016 · form4.xml · nonDerivative · entry 2

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 675.6667

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:56 UTC
Godbout SeanChief Accounting Officer
Exercise / conversionCommon Stock 257 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000016 · form4.xml · nonDerivative · entry 1

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 751.6667

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Exercise / conversionRestricted Stock Unit · Derivative 4,916 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · derivative · entry 10

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,834

Underlying: Common Stock · 4,916 shares

Expires 2028-02-06

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Exercise / conversionRestricted Stock Unit · Derivative 1,940 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · derivative · entry 9

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,940

Underlying: Common Stock · 1,940 shares

Expires 2027-02-07

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Exercise / conversionRestricted Stock Unit · Derivative 2,190 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · derivative · entry 8

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,190 shares

Expires 2026-02-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 2/8/2023.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Tax withholdingCommon Stock 1,514 $201.18 $304,586.52
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · nonDerivative · entry 6

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,807

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Exercise / conversionCommon Stock 4,916 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · nonDerivative · entry 5

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,321

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Tax withholdingCommon Stock 931 $201.18 $187,298.58
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · nonDerivative · entry 4

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,405

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Exercise / conversionCommon Stock 1,940 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · nonDerivative · entry 3

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,336

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Tax withholdingCommon Stock 1,059 $201.18 $213,049.62
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · nonDerivative · entry 2

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,396

Read SEC document
February 06, 2026 Filed Feb 10, 2026 21:55 UTC
ALEXANDER SUSAN HEVP Chief Legal Officer
Exercise / conversionCommon Stock 2,190 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000015 · form4.xml · nonDerivative · entry 1

ALEXANDER SUSAN H · CIK 0001263839 · EVP Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,455

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 02, 2026 Filed Feb 3, 2026 22:17 UTC
Singhal PriyaHead of Development
SaleCommon Stock 748 $179.30 $134,116.40
Disclosure

SEC source: 0000875045-26-000007 · form4.xml · nonDerivative · entry 3

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,271.1428

Read SEC document
January 30, 2026 Filed Feb 3, 2026 22:17 UTC
Singhal PriyaHead of Development
Exercise / conversionRestricted Stock Unit · Derivative 1,829 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000007 · form4.xml · derivative · entry 4

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,829 shares

Expires 2026-02-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: This award was granted to the reporting person on February 1, 2023 and will vest in three equal installments on each anniversary of the grant date.

Read SEC document
January 30, 2026 Filed Feb 3, 2026 22:17 UTC
Singhal PriyaHead of Development
Tax withholdingCommon Stock 582 $179.89 $104,695.98
Disclosure

SEC source: 0000875045-26-000007 · form4.xml · nonDerivative · entry 2

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,019.1428

Read SEC document
January 30, 2026 Filed Feb 3, 2026 22:17 UTC
Singhal PriyaHead of Development
Exercise / conversionCommon Stock 1,829 $0.00 $0.00
Disclosure

SEC source: 0000875045-26-000007 · form4.xml · nonDerivative · entry 1

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,601.1428

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
December 01, 2025 Filed Dec 3, 2025 21:42 UTC
Viehbacher ChristopherDirector · President and CEO
Exercise / conversionRestricted Stock Unit · Derivative 7,040 $0.00 $0.00
Disclosure

SEC source: 0000875045-25-000052 · form4.xml · derivative · entry 3

Viehbacher Christopher · CIK 0001774478 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,040 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive, at settlement, one share of common stock.

F2 · derivative.exercise_date: Each RSU vested on the third anniversary of the grant date of December 1, 2022.

F2 · derivative.expiration_date: Each RSU vested on the third anniversary of the grant date of December 1, 2022.

Read SEC document
December 01, 2025 Filed Dec 3, 2025 21:42 UTC
Viehbacher ChristopherDirector · President and CEO
Tax withholdingCommon Stock 3,404 $177.78 $605,163.12
Disclosure

SEC source: 0000875045-25-000052 · form4.xml · nonDerivative · entry 2

Viehbacher Christopher · CIK 0001774478 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,443

Read SEC document
December 01, 2025 Filed Dec 3, 2025 21:42 UTC
Viehbacher ChristopherDirector · President and CEO
Exercise / conversionCommon Stock 7,040 $0.00 $0.00
Disclosure

SEC source: 0000875045-25-000052 · form4.xml · nonDerivative · entry 1

Viehbacher Christopher · CIK 0001774478 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,847

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
October 31, 2025 Filed Nov 4, 2025 21:12 UTC
Grogan JaneHead of Research
Exercise / conversionRestricted Stock Unit · Derivative 695 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0000875045-25-000051 · form4.xml · derivative · entry 3

Grogan Jane · CIK 0001995547 · Head of Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 695

Underlying: Common Stock · 695 shares

Expires 2026-11-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of November 1, 2023.

Read SEC document
October 31, 2025 Filed Nov 4, 2025 21:12 UTC
Grogan JaneHead of Research
Tax withholdingCommon Stock 337 $154.27 $51,988.99
Disclosure

SEC source: 0000875045-25-000051 · form4.xml · nonDerivative · entry 2

Grogan Jane · CIK 0001995547 · Head of Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,791

Read SEC document
October 31, 2025 Filed Nov 4, 2025 21:12 UTC
Grogan JaneHead of Research
Exercise / conversionCommon Stock 695 $0.00 $0.00
Disclosure

SEC source: 0000875045-25-000051 · form4.xml · nonDerivative · entry 1

Grogan Jane · CIK 0001995547 · Head of Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,128

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
October 02, 2025 Filed Oct 6, 2025 17:00 UTC
Godbout SeanChief Accounting Officer
Exercise / conversionRestricted Stock Unit · Derivative 26 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0000875045-25-000037 · form4.xml · derivative · entry 3

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27

Underlying: Common Stock · 26 shares

Expires 2026-10-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 10/02/2023.

Read SEC document
October 02, 2025 Filed Oct 6, 2025 17:00 UTC
Godbout SeanChief Accounting Officer
Tax withholdingCommon Stock 8 $155.25 $1,242.00
Disclosure

SEC source: 0000875045-25-000037 · form4.xml · nonDerivative · entry 2

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 494.6667

Read SEC document
October 02, 2025 Filed Oct 6, 2025 17:00 UTC
Godbout SeanChief Accounting Officer
Exercise / conversionCommon Stock 26 $0.00 $0.00
Disclosure

SEC source: 0000875045-25-000037 · form4.xml · nonDerivative · entry 1

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 502.6667

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
September 02, 2025 Filed Sep 2, 2025 21:56 UTC
Singhal PriyaHead of Development
SaleCommon Stock 517 $133.55 $69,045.35
Disclosure

SEC source: 0001127602-25-021083 · form4.xml · nonDerivative · entry 3

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,772.1428

Read SEC document
August 29, 2025 Filed Sep 2, 2025 21:56 UTC
Singhal PriyaHead of Development
Exercise / conversionRestricted Stock Unit · Derivative 1,669 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001127602-25-021083 · form4.xml · derivative · entry 4

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,669 shares

Expires 2025-09-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: This award was granted to the reporting person on September 1, 2022 and will vest in three equal installments on each anniversary of the grant date.

Read SEC document
August 29, 2025 Filed Sep 2, 2025 21:56 UTC
Singhal PriyaHead of Development
Tax withholdingCommon Stock 807 $132.22 $106,701.54
Disclosure

SEC source: 0001127602-25-021083 · form4.xml · nonDerivative · entry 2

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,289.1428

Read SEC document
August 29, 2025 Filed Sep 2, 2025 21:56 UTC
Singhal PriyaHead of Development
Exercise / conversionCommon Stock 1,669 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-021083 · form4.xml · nonDerivative · entry 1

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,096.1428

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
July 08, 2025 Filed Jul 16, 2025 21:55 UTC
Izzar RachidHead of Global Product Strat.
SaleCommon Stock 2,223 $135.00 $300,105.00
Disclosure

SEC source: 0001127602-25-019295 · form4.xml · nonDerivative · entry 1

Izzar Rachid · CIK 0001875506 · Head of Global Product Strat.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,330

Read SEC document
June 17, 2025 Filed Jun 18, 2025 21:05 UTC GrantRestricted Stock Unit · Derivative 2,370 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017767 · form4.xml · derivative · entry 1

Pangalos Menelas N · CIK 0002001873 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,370

Underlying: Common Stock · 2,370 shares

Expires 2026-06-17

F1 · derivative.exercise_date: 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.

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:54 UTC
Minor LloydDirector
GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017766 · form4.xml · nonDerivative · entry 1

Minor Lloyd · CIK 0002038687 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,370

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:53 UTC GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017765 · form4.xml · nonDerivative · entry 1

Patolawala Monish D · CIK 0001815253 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,710

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:47 UTC GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017763 · form4.xml · nonDerivative · entry 1

Mantas Jesus B · CIK 0001777331 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,758

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:45 UTC GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017761 · form4.xml · nonDerivative · entry 1

Freire Maria C · CIK 0001547999 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,815

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:46 UTC GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017762 · form4.xml · nonDerivative · entry 1

HAWKINS WILLIAM A · CIK 0001106508 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,860

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:44 UTC GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017760 · form4.xml · nonDerivative · entry 1

Rowinsky Eric K · CIK 0001318886 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,339

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:42 UTC GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017759 · form4.xml · nonDerivative · entry 1

SHERWIN STEPHEN A · CIK 0001079462 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,688

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:38 UTC
LANGER SUSANDirector
GrantCommon Stock 2,370 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017758 · form4.xml · nonDerivative · entry 1

LANGER SUSAN · CIK 0001982640 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,129.1

Read SEC document
June 17, 2025 Filed Jun 18, 2025 20:34 UTC GrantCommon Stock 3,160 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-017756 · form4.xml · nonDerivative · entry 1

DORSA CAROLINE · CIK 0001181174 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,002

Read SEC document
May 19, 2025 Filed May 20, 2025 20:05 UTC
Singhal PriyaHead of Development
SaleCommon Stock 3,806 $126.25 $480,507.50
Disclosure

SEC source: 0001127602-25-015011 · form4.xml · nonDerivative · entry 1

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,427.1428

F1 · balance_after: Includes 166.6667 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2025.

Read SEC document
May 02, 2025 Filed May 5, 2025 20:17 UTC PurchaseCommon Stock 1,235 $122.72 $151,559.20
Disclosure

SEC source: 0001127602-25-013345 · form4.xml · nonDerivative · entry 1

DORSA CAROLINE · CIK 0001181174 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,842

Read SEC document
May 01, 2025 Filed May 5, 2025 20:19 UTC
Keeney AdamHead of Corporate Development
Exercise / conversionRestricted Stock Unit · Derivative 938 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001127602-25-013346 · form4.xml · derivative · entry 3

Keeney Adam · CIK 0001973607 · Head of Corporate Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 939

Underlying: Common Stock · 938 shares

Expires 2026-05-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of May 1, 2023.

Read SEC document
May 01, 2025 Filed May 5, 2025 20:19 UTC
Keeney AdamHead of Corporate Development
Tax withholdingCommon Stock 454 $120.93 $54,902.22
Disclosure

SEC source: 0001127602-25-013346 · form4.xml · nonDerivative · entry 2

Keeney Adam · CIK 0001973607 · Head of Corporate Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,384

Read SEC document
May 01, 2025 Filed May 5, 2025 20:19 UTC
Keeney AdamHead of Corporate Development
Exercise / conversionCommon Stock 938 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-013346 · form4.xml · nonDerivative · entry 1

Keeney Adam · CIK 0001973607 · Head of Corporate Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,838

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
April 01, 2025 Filed Apr 3, 2025 20:15 UTC
Godbout SeanChief Accounting Officer
GrantRestricted Stock Unit · Derivative 545 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001127602-25-011365 · form4.xml · derivative · entry 2

Godbout Sean · CIK 0002057736 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 545

Underlying: Common Stock · 545 shares

Expires 2028-04-01

F2 · derivative.exercise_date: The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of April 1, 2025.

Read SEC document
March 07, 2025 Filed Mar 10, 2025 20:09 UTC SaleCommon Stock 8,760 $150.02 $1,314,141.91
Disclosure

SEC source: 0001127602-25-008861 · form4.xml · nonDerivative · entry 1

SHERWIN STEPHEN A · CIK 0001079462 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,318

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February 10, 2025 Filed Feb 12, 2025 22:48 UTC
Singhal PriyaHead of Development
Exercise / conversionRestricted Stock Unit · Derivative 1,212 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001127602-25-004462 · form4.xml · derivative · entry 3

Singhal Priya · CIK 0001769608 · Head of Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,212 shares

Expires 2025-02-10

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: This award was granted to the reporting person on February 10, 2022 and will vest in three equal installments on each anniversary of the grant date.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.