Stocks
BIIB BIOGEN INC.

BIIB

BIOGEN INC.

Company with tickers: BIIB

CIK

875045

CUSIP

09062X103

Shares Outstanding

146,758,528

Price Holdings Short Volume Short Interest Fails to Deliver SEC Filings Earnings Calls Insider Trading Congress Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-04-01	Godbout Sean	Chief Accounting Officer	Convert	181	—	—	1,395
2026-04-01	Godbout Sean	Chief Accounting Officer	Convert	181	—	—	364
2026-04-01	Godbout Sean	Chief Accounting Officer	Tax	54	$183.78	$9,924	1,341
2026-03-31	BIOGEN INC.	10% Owner	Other	0	—	—	0
2026-03-31	BIOGEN INC.	10% Owner	Other	0	—	—	0
2026-02-13	Viehbacher Christopher	Director, President and CEO	Award	38,015	—	—	38,015
2026-02-13	Izzar Rachid	Head of Global Product Strat.	Award	7,390	—	—	7,390
2026-02-13	Grogan Jane	Head of Research	Award	8,450	—	—	8,450
2026-02-13	Gregory Ginger	EVP, Human Resources	Award	8,025	—	—	8,025
2026-02-13	Godbout Sean	Chief Accounting Officer	Award	1,800	—	—	1,800
2026-02-13	Singhal Priya	Head of Development	Award	10,560	—	—	10,560
2026-02-13	Murphy Nicole	Head of Pharm Ops and Tech	Award	10,560	—	—	10,560
2026-02-13	Kramer Robin	Chief Financial Officer	Award	8,450	—	—	8,450
2026-02-13	Keeney Adam	Head of Corporate Development	Award	8,025	—	—	8,025
2026-02-13	ALEXANDER SUSAN H	EVP Chief Legal Officer	Award	8,450	—	—	8,450
2026-02-12	Murphy Nicole	Head of Pharm Ops and Tech	Buy	3	$195.04	$585	19,611
2026-02-09	Singhal Priya	Head of Development	Sell	2,660	$199.83	$531,548	8,043
2026-02-06	Viehbacher Christopher	Director, President and CEO	Tax	4,356	$201.18	$876,340	21,095
2026-02-06	Viehbacher Christopher	Director, President and CEO	Convert	9,008	—	—	9,009
2026-02-06	Viehbacher Christopher	Director, President and CEO	Convert	9,008	—	—	25,451
2026-02-06	Murphy Nicole	Head of Pharm Ops and Tech	Convert	2,102	—	—	16,324
2026-02-06	Murphy Nicole	Head of Pharm Ops and Tech	Tax	1,017	$201.18	$204,600	15,307
2026-02-06	Murphy Nicole	Head of Pharm Ops and Tech	Convert	2,102	—	—	0
2026-02-06	Kramer Robin	Chief Financial Officer	Convert	789	—	—	8,800
2026-02-06	Kramer Robin	Chief Financial Officer	Convert	789	—	—	0
2026-02-06	Kramer Robin	Chief Financial Officer	Tax	273	$201.18	$54,922	8,527
2026-02-06	Singhal Priya	Head of Development	Convert	2,217	—	—	2,217
2026-02-06	Singhal Priya	Head of Development	Tax	1,056	$201.18	$212,446	7,432
2026-02-06	Singhal Priya	Head of Development	Convert	2,217	—	—	8,488
2026-02-06	Keeney Adam	Head of Corporate Development	Convert	1,802	—	—	1,802
2026-02-06	Keeney Adam	Head of Corporate Development	Tax	589	$201.18	$118,495	3,597
2026-02-06	Keeney Adam	Head of Corporate Development	Convert	1,802	—	—	4,186
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Convert	2,044	—	—	0
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Convert	2,044	—	—	8,204
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Tax	805	$201.18	$161,950	7,399
2026-02-06	Grogan Jane	Head of Research	Convert	1,385	—	—	3,176
2026-02-06	Grogan Jane	Head of Research	Convert	1,385	—	—	1,385
2026-02-06	Grogan Jane	Head of Research	Tax	407	$201.18	$81,880	2,769
2026-02-06	Gregory Ginger	EVP, Human Resources	Convert	1,635	—	—	0
2026-02-06	Gregory Ginger	EVP, Human Resources	Convert	1,635	—	—	19,399
2026-02-06	Gregory Ginger	EVP, Human Resources	Tax	791	$201.18	$159,133	18,608
2026-02-06	Godbout Sean	Chief Accounting Officer	Tax	76	$201.18	$15,290	675
2026-02-06	Godbout Sean	Chief Accounting Officer	Convert	257	—	—	751
2026-02-06	Godbout Sean	Chief Accounting Officer	Convert	257	—	—	0
2026-02-06	ALEXANDER SUSAN H	EVP Chief Legal Officer	Other	20,082	—	—	20,082
2026-02-06	ALEXANDER SUSAN H	EVP Chief Legal Officer	Convert	2,190	—	—	38,455
2026-02-06	ALEXANDER SUSAN H	EVP Chief Legal Officer	Tax	1,059	$201.18	$213,050	37,396
2026-02-06	ALEXANDER SUSAN H	EVP Chief Legal Officer	Convert	2,190	—	—	0
2026-02-02	Singhal Priya	Head of Development	Sell	748	$179.30	$134,116	6,271
2026-01-30	Singhal Priya	Head of Development	Convert	1,829	—	—	0
2026-01-30	Singhal Priya	Head of Development	Convert	1,829	—	—	7,601
2026-01-30	Singhal Priya	Head of Development	Tax	582	$179.89	$104,696	7,019
2025-12-01	Viehbacher Christopher	Director, President and CEO	Tax	3,404	$177.78	$605,163	16,443
2025-12-01	Viehbacher Christopher	Director, President and CEO	Convert	7,040	—	—	19,847
2025-12-01	Viehbacher Christopher	Director, President and CEO	Convert	7,040	—	—	0
2025-10-31	Grogan Jane	Head of Research	Convert	695	—	—	2,128
2025-10-31	Grogan Jane	Head of Research	Convert	695	—	—	695
2025-10-31	Grogan Jane	Head of Research	Tax	337	$154.27	$51,989	1,791
2025-10-02	Godbout Sean	Chief Accounting Officer	Convert	26	—	—	502
2025-10-02	Godbout Sean	Chief Accounting Officer	Tax	8	$155.25	$1,242	494
2025-10-02	Godbout Sean	Chief Accounting Officer	Convert	26	—	—	27
2025-09-02	Singhal Priya	Head of Development	Sell	517	$133.55	$69,045	5,772
2025-08-29	Singhal Priya	Head of Development	Tax	807	$132.22	$106,702	6,289
2025-08-29	Singhal Priya	Head of Development	Convert	1,669	—	—	7,096
2025-08-29	Singhal Priya	Head of Development	Convert	1,669	—	—	0
2025-07-08	Izzar Rachid	Head of Global Product Strat.	Sell	2,223	$135.00	$300,105	6,330
2025-06-17	Patolawala Monish D	Executive Vice President & CFO	Award	2,370	—	—	3,710
2025-06-17	Mantas Jesus B	Director	Award	2,370	—	—	9,758
2025-06-17	HAWKINS WILLIAM A	Director	Award	2,370	—	—	8,860
2025-06-17	Freire Maria C	Director	Award	2,370	—	—	6,815
2025-06-17	Rowinsky Eric K	Director	Award	2,370	—	—	24,339
2025-06-17	SHERWIN STEPHEN A	Director	Award	2,370	—	—	13,688
2025-06-17	DORSA CAROLINE	Director	Award	3,160	—	—	31,002
2025-06-17	Pangalos Menelas N	Director	Award	2,370	—	—	2,370
2025-06-17	Minor Lloyd	Director	Award	2,370	—	—	2,370
2025-06-17	LANGER SUSAN	Director	Award	2,370	—	—	5,129
2025-05-19	Singhal Priya	Head of Development	Sell	3,806	$126.25	$480,508	5,427
2025-05-02	DORSA CAROLINE	Director	Buy	1,235	$122.72	$151,559	27,842
2025-05-01	Keeney Adam	Head of Corporate Development	Convert	938	—	—	939
2025-05-01	Keeney Adam	Head of Corporate Development	Tax	454	$120.93	$54,902	2,384
2025-05-01	Keeney Adam	Head of Corporate Development	Convert	938	—	—	2,838
2025-04-01	Godbout Sean	Chief Accounting Officer	Award	545	—	—	545
2025-04-01	Godbout Sean	Chief Accounting Officer	Other	476	—	—	476
2025-03-07	SHERWIN STEPHEN A	Director	Sell	8,760	$150.02	$1,314,142	11,318
2025-03-01	Godbout Sean	Chief Accounting Officer	Other	310	—	—	310
2025-03-01	Godbout Sean	Chief Accounting Officer	Other	0	—	—	0
2025-02-10	Izzar Rachid	Head of Global Product Strat.	Convert	1,515	—	—	8,998
2025-02-10	Izzar Rachid	Head of Global Product Strat.	Tax	445	$142.54	$63,430	8,553
2025-02-10	Izzar Rachid	Head of Global Product Strat.	Convert	1,515	—	—	0
2025-02-10	MCDONNELL MICHAEL R	EVP and CFO	Convert	3,257	—	—	25,712
2025-02-10	MCDONNELL MICHAEL R	EVP and CFO	Convert	3,257	—	—	0
2025-02-10	MCDONNELL MICHAEL R	EVP and CFO	Tax	1,371	$142.54	$195,422	24,341
2025-02-10	Kramer Robin	Chief Financial Officer	Tax	245	$142.54	$34,922	8,011
2025-02-10	Kramer Robin	Chief Financial Officer	Convert	834	—	—	8,256
2025-02-10	Kramer Robin	Chief Financial Officer	Convert	834	—	—	0
2025-02-10	Gregory Ginger	EVP, Human Resources	Convert	2,159	—	—	18,232
2025-02-10	Gregory Ginger	EVP, Human Resources	Tax	634	$142.54	$90,370	17,598
2025-02-10	Gregory Ginger	EVP, Human Resources	Convert	2,159	—	—	0
2025-02-10	ALEXANDER SUSAN H	EVP Chief Legal Officer	Convert	2,575	—	—	37,072
2025-02-10	ALEXANDER SUSAN H	EVP Chief Legal Officer	Tax	807	$142.54	$115,030	36,265