$BIIB

📈 Chart

126 transactions across 17 dates · last 365 days

6-Month Buy/Sell Trend

Buys Sells
2026-04-01
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Godbout Sean Chief Accounting Officer M 181 $0 $0 Apr 3
Godbout Sean Chief Accounting Officer F 54 $184 $10K Apr 3
Godbout Sean Chief Accounting Officer M 181 $0 $0 Apr 3
2026-02-13
10 other
⚡ 10 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
ALEXANDER SUSAN H EVP Chief Legal Officer A 8,450 $0 $0 Feb 17
Godbout Sean Chief Accounting Officer A 1,800 $0 $0 Feb 17
Gregory Ginger EVP, Human Resources A 8,025 $0 $0 Feb 17
Grogan Jane Head of Research A 8,450 $0 $0 Feb 17
Izzar Rachid Head of Global Product Strat. A 7,390 $0 $0 Feb 17
Keeney Adam Head of Corporate Development A 8,025 $0 $0 Feb 17
Kramer Robin Chief Financial Officer A 8,450 $0 $0 Feb 17
Murphy Nicole Head of Pharm Ops and Tech A 10,560 $0 $0 Feb 17
Singhal Priya Head of Development A 10,560 $0 $0 Feb 17
Viehbacher Christopher President and CEO A 38,015 $0 $0 Feb 17
2026-02-12
▲ 1 buy · $$585
Insider Title Type Shares Price $ Value 10b5-1 Filed
Murphy Nicole Head of Pharm Ops and Tech ▲ Buy 3 $195 $585 Feb 17
2026-02-06
78 other
⚡ 10 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
ALEXANDER SUSAN H EVP Chief Legal Officer M 2,190 $0 $0 Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer F 1,059 $201 $213K Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer M 1,940 $0 $0 Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer F 931 $201 $187K Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer M 4,916 $0 $0 Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer F 1,514 $201 $305K Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer M 2,190 $0 $0 Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer M 1,940 $0 $0 Feb 10
ALEXANDER SUSAN H EVP Chief Legal Officer M 4,916 $0 $0 Feb 10
Godbout Sean Chief Accounting Officer M 257 $0 $0 Feb 10
Godbout Sean Chief Accounting Officer F 76 $201 $15K Feb 10
Godbout Sean Chief Accounting Officer M 305 $0 $0 Feb 10
Godbout Sean Chief Accounting Officer F 103 $201 $21K Feb 10
Godbout Sean Chief Accounting Officer M 517 $0 $0 Feb 10
Godbout Sean Chief Accounting Officer F 180 $201 $36K Feb 10
Godbout Sean Chief Accounting Officer M 257 $0 $0 Feb 10
Godbout Sean Chief Accounting Officer M 305 $0 $0 Feb 10
Godbout Sean Chief Accounting Officer M 517 $0 $0 Feb 10
Gregory Ginger EVP, Human Resources M 1,635 $0 $0 Feb 10
Gregory Ginger EVP, Human Resources F 791 $201 $159K Feb 10
Gregory Ginger EVP, Human Resources M 1,802 $0 $0 Feb 10
Gregory Ginger EVP, Human Resources F 666 $201 $134K Feb 10
Gregory Ginger EVP, Human Resources M 3,746 $0 $0 Feb 10
Gregory Ginger EVP, Human Resources F 1,132 $201 $228K Feb 10
Gregory Ginger EVP, Human Resources M 1,635 $0 $0 Feb 10
Gregory Ginger EVP, Human Resources M 1,802 $0 $0 Feb 10
Gregory Ginger EVP, Human Resources M 3,746 $0 $0 Feb 10
Grogan Jane Head of Research M 1,385 $0 $0 Feb 10
Grogan Jane Head of Research F 407 $201 $82K Feb 10
Grogan Jane Head of Research M 1,873 $0 $0 Feb 10
Grogan Jane Head of Research F 584 $201 $117K Feb 10
Grogan Jane Head of Research M 1,385 $0 $0 Feb 10
Grogan Jane Head of Research M 1,873 $0 $0 Feb 10
Izzar Rachid Head of Global Product Strat. M 2,044 $0 $0 Feb 10
Izzar Rachid Head of Global Product Strat. F 805 $201 $162K Feb 10
Izzar Rachid Head of Global Product Strat. M 1,802 $0 $0 Feb 10
Izzar Rachid Head of Global Product Strat. F 458 $201 $92K Feb 10
Izzar Rachid Head of Global Product Strat. M 3,043 $0 $0 Feb 10
Izzar Rachid Head of Global Product Strat. F 775 $201 $156K Feb 10
Izzar Rachid Head of Global Product Strat. M 2,044 $0 $0 Feb 10
Izzar Rachid Head of Global Product Strat. M 1,802 $0 $0 Feb 10
Izzar Rachid Head of Global Product Strat. M 3,043 $0 $0 Feb 10
Keeney Adam Head of Corporate Development M 1,802 $0 $0 Feb 10
Keeney Adam Head of Corporate Development F 589 $201 $118K Feb 10
Keeney Adam Head of Corporate Development M 3,278 $0 $0 Feb 10
Keeney Adam Head of Corporate Development F 994 $201 $200K Feb 10
Keeney Adam Head of Corporate Development M 1,802 $0 $0 Feb 10
Keeney Adam Head of Corporate Development M 3,278 $0 $0 Feb 10
Kramer Robin Chief Financial Officer M 789 $0 $0 Feb 10
Kramer Robin Chief Financial Officer F 273 $201 $55K Feb 10
Kramer Robin Chief Financial Officer M 703 $0 $0 Feb 10
Kramer Robin Chief Financial Officer F 207 $201 $42K Feb 10
Kramer Robin Chief Financial Officer M 3,511 $0 $0 Feb 10
Kramer Robin Chief Financial Officer F 1,063 $201 $214K Feb 10
Kramer Robin Chief Financial Officer M 789 $0 $0 Feb 10
Kramer Robin Chief Financial Officer M 703 $0 $0 Feb 10
Kramer Robin Chief Financial Officer M 3,511 $0 $0 Feb 10
Murphy Nicole Head of Pharm Ops and Tech M 2,102 $0 $0 Feb 10
Murphy Nicole Head of Pharm Ops and Tech F 1,017 $201 $205K Feb 10
Murphy Nicole Head of Pharm Ops and Tech M 1,940 $0 $0 Feb 10
Murphy Nicole Head of Pharm Ops and Tech F 914 $201 $184K Feb 10
Murphy Nicole Head of Pharm Ops and Tech M 4,683 $0 $0 Feb 10
Murphy Nicole Head of Pharm Ops and Tech F 1,408 $201 $283K Feb 10
Murphy Nicole Head of Pharm Ops and Tech M 2,102 $0 $0 Feb 10
Murphy Nicole Head of Pharm Ops and Tech M 1,940 $0 $0 Feb 10
Murphy Nicole Head of Pharm Ops and Tech M 4,683 $0 $0 Feb 10
Singhal Priya Head of Development M 2,217 $0 $0 Feb 10
Singhal Priya Head of Development F 1,056 $201 $212K Feb 10
Singhal Priya Head of Development M 4,683 $0 $0 Feb 10
Singhal Priya Head of Development F 1,412 $201 $284K Feb 10
Singhal Priya Head of Development M 2,217 $0 $0 Feb 10
Singhal Priya Head of Development M 4,683 $0 $0 Feb 10
Viehbacher Christopher President and CEO M 9,008 $0 $0 Feb 10
Viehbacher Christopher President and CEO F 4,356 $201 $876K Feb 10
Viehbacher Christopher President and CEO M 15,453 $0 $0 Feb 10
Viehbacher Christopher President and CEO F 6,624 $201 $1.3M Feb 10
Viehbacher Christopher President and CEO M 9,008 $0 $0 Feb 10
Viehbacher Christopher President and CEO M 15,453 $0 $0 Feb 10
2026-02-09
▼ 1 sell · $532K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Singhal Priya Head of Development ▼ Sell 2,660 $200 $532K Feb 10
2026-01-30
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Singhal Priya Head of Development M 1,829 $0 $0 Feb 3
Singhal Priya Head of Development F 582 $180 $105K Feb 3
Singhal Priya Head of Development M 1,829 $0 $0 Feb 3
2026-02-02
▼ 1 sell · $134K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Singhal Priya Head of Development ▼ Sell 748 $179 $134K Feb 3
2025-12-01
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Viehbacher Christopher President and CEO M 7,040 $0 $0 Dec 3
Viehbacher Christopher President and CEO F 3,404 $178 $605K Dec 3
Viehbacher Christopher President and CEO M 7,040 $0 $0 Dec 3
2025-10-31
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Grogan Jane Head of Research M 695 $0 $0 Nov 4
Grogan Jane Head of Research F 337 $154 $52K Nov 4
Grogan Jane Head of Research M 695 $0 $0 Nov 4
2025-10-02
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Godbout Sean Chief Accounting Officer M 26 $0 $0 Oct 6
Godbout Sean Chief Accounting Officer F 8 $155 $1K Oct 6
Godbout Sean Chief Accounting Officer M 26 $0 $0 Oct 6
2025-08-29
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Singhal Priya Head of Development M 1,669 $0 $0 Sep 2
Singhal Priya Head of Development F 807 $132 $107K Sep 2
Singhal Priya Head of Development M 1,669 $0 $0 Sep 2
2025-09-02
▼ 1 sell · $69K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Singhal Priya Head of Development ▼ Sell 517 $134 $69K Sep 2
2025-07-08
▼ 1 sell · $300K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Izzar Rachid Head of Global Product Strat. ▼ Sell 2,223 $135 $300K Jul 16
2025-06-17
10 other
⚡ 10 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
DORSA CAROLINE A 3,160 $0 $0 Jun 18
LANGER SUSAN A 2,370 $0 $0 Jun 18
SHERWIN STEPHEN A A 2,370 $0 $0 Jun 18
Rowinsky Eric K A 2,370 $0 $0 Jun 18
Freire Maria C A 2,370 $0 $0 Jun 18
HAWKINS WILLIAM A A 2,370 $0 $0 Jun 18
Mantas Jesus B A 2,370 $0 $0 Jun 18
Patolawala Monish D A 2,370 $0 $0 Jun 18
Minor Lloyd A 2,370 $0 $0 Jun 18
Pangalos Menelas N A 2,370 $0 $0 Jun 18
2025-05-19
▼ 1 sell · $481K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Singhal Priya Head of Development ▼ Sell 3,806 $126 $481K May 20
2025-05-02
▲ 1 buy · $152K
Insider Title Type Shares Price $ Value 10b5-1 Filed
DORSA CAROLINE ▲ Buy 1,235 $123 $152K May 5
2025-05-01
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Keeney Adam Head of Corporate Development M 938 $0 $0 May 5
Keeney Adam Head of Corporate Development F 454 $121 $55K May 5
Keeney Adam Head of Corporate Development M 938 $0 $0 May 5