Biogen Inc. BIIB NASDAQ

NASDAQ Global Select • Healthcare • Drug Manufacturers - General • US • USD

SharesGrow Score

60/100

2/7 Pass

SharesGrow Intrinsic Value

Biogen Inc. (BIIB) has 20 known insider and institutional holders on record. The largest holder is Viehbacher Christopher with 38,015 shares. Other notable holders include DORSA CAROLINE and Vounatsos Michel.

Over the last 12 months, insiders have made 39 transactions in BIIB stock — 22 buys (valued at $152.14K) and 3 sells (valued at $1.15M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

BIIB Insider Ownership

Top Holder

Viehbacher Christopher

38,015 shares

Buys (12 mo)

$152.14K value

Sells (12 mo)

$1.15M value

12-Month Transaction Activity

Buy 56%

Sell 8%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Viehbacher Christopher	President and CEO	38,015	2026-02-17	100%
2	Dorsa Caroline	Director	31,002	2025-06-18	82%
3	Vounatsos Michel	Chief Executive Officer	30,210	2022-02-23	79%
4	Rowinsky Eric K	Director	24,339	2025-06-18	64%
5	Pangia Robert W	Director	20,632	2020-06-05	54%
6	Murphy Nicole	Head of Pharm Ops and Tech	19,611	2026-02-17	52%
7	Denner Alexander J	Director	15,099	2022-06-17	40%
8	Mulligan Richard	Director	15,099	2022-06-17	40%
9	Leaming Nancy	Director	13,763	2021-07-02	36%
10	Sherwin Stephen A	Director	13,688	2025-06-18	36%
11	Singhal Priya	Head of Development	10,560	2026-02-17	28%
12	Sandrock Alfred	Head of Research & Development	10,169	2021-06-09	27%
13	Papadopoulos Stelios	Director	10,095	2022-06-17	27%
14	Mantas Jesus B	Director	9,758	2025-06-18	26%
15	Schenk Lynn	Director	9,032	2019-06-20	24%
16	Hawkins William A	Director	8,860	2025-06-18	23%
17	Grogan Jane	Head of Research	8,450	2026-02-17	22%
18	Alexander Susan H	EVP Chief Legal Officer	8,450	2026-02-17	22%
19	Kramer Robin	Chief Financial Officer	8,450	2026-02-17	22%
20	Posner Brian S	Director	8,175	2021-07-02	22%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-04-01	Godbout Sean	Chief Accounting Officer	Option Exercise (Sell)	181	-	-
2026-02-13	Godbout Sean	Chief Accounting Officer	RSU Award	1,800	-	-
2026-02-13	Grogan Jane	Head of Research	RSU Award	8,450	-	-
2026-02-13	Keeney Adam	Head of Corporate Development	RSU Award	8,025	-	-
2026-02-13	Murphy Nicole	Head of Pharm Ops and Tech	RSU Award	10,560	-	-
2026-02-12	Murphy Nicole	Head of Pharm Ops and Tech	Informative Buy	3	$195.04	$585.11
2026-02-13	Izzar Rachid	Head of Global Product Strat.	RSU Award	7,390	-	-
2026-02-13	Viehbacher Christopher	President and CEO	RSU Award	38,015	-	-
2026-02-13	Singhal Priya	Head of Development	RSU Award	10,560	-	-
2026-02-13	Kramer Robin	Chief Financial Officer	RSU Award	8,450	-	-
2026-02-13	Gregory Ginger	EVP, Human Resources	RSU Award	8,025	-	-
2026-02-13	Alexander Susan H	EVP Chief Legal Officer	RSU Award	8,450	-	-
2026-02-06	Godbout Sean	Chief Accounting Officer	Option Exercise (Sell)	257	-	-
2026-02-06	Grogan Jane	Head of Research	Option Exercise (Sell)	1,385	-	-
2026-02-06	Keeney Adam	Head of Corporate Development	Option Exercise (Sell)	1,802	-	-
2026-02-06	Murphy Nicole	Head of Pharm Ops and Tech	Option Exercise (Sell)	2,102	-	-
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Option Exercise (Sell)	2,044	-	-
2026-02-06	Viehbacher Christopher	President and CEO	Option Exercise (Sell)	9,008	-	-
2026-02-09	Singhal Priya	Head of Development	Informative Sell	2,660	$199.83	$531.55K
2026-02-06	Singhal Priya	Head of Development	Option Exercise (Sell)	2,217	-	-
2026-02-06	Kramer Robin	Chief Financial Officer	Option Exercise (Sell)	789	-	-
2026-02-06	Gregory Ginger	EVP, Human Resources	Option Exercise (Sell)	1,635	-	-
2026-02-06	Alexander Susan H	EVP Chief Legal Officer	Option Exercise (Sell)	2,190	-	-
2026-02-02	Singhal Priya	Head of Development	Informative Sell	748	$179.30	$134.12K
2026-01-30	Singhal Priya	Head of Development	Option Exercise (Sell)	1,829	-	-