BIIB · Biogen Inc. · Insider Trading

$225.88 -1.19 (-0.52%) At close · Sep 30

S&P 500 member Russell 1000 member Rebalance outlook locked

Market Cap

$33.52B

147.64M

Volume · Sep 30 1.55M Avg daily vol (3M) 1.08M

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.

Query insider transactions through the insider trading API or MCP →

Date	Insider	Role	Type	Security	Shares	Price	Value	After
2026-09-01	Parini Michael	EVP, Chief Adm, Leg & BD Off	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of September 1, 2026.	Restricted Stock Unit	7,405	—	—	7,405
2026-08-04	Minor Lloyd	Director	Sell↓	Common Stock	593	$200.96	$119,169	2,689
2026-08-03	Minor Lloyd	Director	Sell↓	Common Stock	593	$203.34	$120,581	3,282
2026-06-09	HAWKINS WILLIAM A	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	10,365
2026-06-09	Patolawala Monish D	Executive Vice President & CFO	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	5,215
2026-06-09	LANGER SUSAN	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	6,634
2026-06-09	Pangalos Menelas N	Director	Convert↑	Common Stock	2,370	—	—	2,370
2026-06-09	Rowinsky Eric K	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	25,844
2026-06-09	Freire Maria C	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	2,005	—	—	8,820
2026-06-09	Mantas Jesus B	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	11,263
2026-06-09	Pangalos Menelas N	Director	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) 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.	Restricted Stock Unit	2,370	—	—	0
2026-06-09	SHERWIN STEPHEN A	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	15,193
2026-06-09	Pangalos Menelas N	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	3,875
2026-06-09	Minor Lloyd	Director	Award↑ Filing footnotes — Common Stock (Direct) 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.	Common Stock	1,505	—	—	3,875
2026-05-01	Keeney Adam	Head of Corporate Development	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of May 1, 2023.	Restricted Stock Unit	939	—	—	0
2026-05-01	Keeney Adam	Head of Corporate Development	Tax↓	Common Stock	455	$187.06	$85,112	6,365
2026-05-01	Keeney Adam	Head of Corporate Development	Convert↑	Common Stock	939	—	—	6,820
2026-04-01	Godbout Sean	Chief Accounting Officer	Convert↑	Common Stock	181	—	—	1,395
2026-04-01	Godbout Sean	Chief Accounting Officer	Tax↓	Common Stock	54	$183.78	$9,924	1,341
2026-04-01	Godbout Sean	Chief Accounting Officer	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of April 1, 2025.	Restricted Stock Unit	181	—	—	364
2026-02-13	Gregory Ginger	EVP, Human Resources	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	8,025	—	—	8,025
2026-02-13	Kramer Robin	Chief Financial Officer	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	8,450	—	—	8,450
2026-02-13	Grogan Jane	Head of Research	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	8,450	—	—	8,450
2026-02-13	Godbout Sean	Chief Accounting Officer	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	1,800	—	—	1,800
2026-02-13	Izzar Rachid	Head of Global Product Strat.	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	7,390	—	—	7,390
2026-02-13	Murphy Nicole	Head of Pharm Ops and Tech	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	10,560	—	—	10,560
2026-02-13	Keeney Adam	Head of Corporate Development	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	8,025	—	—	8,025
2026-02-13	Singhal Priya	Head of Development	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	10,560	—	—	10,560
2026-02-13	Viehbacher Christopher	Director, President and CEO	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	38,015	—	—	38,015
2026-02-13	ALEXANDER SUSAN H	EVP Chief Legal Officer	Award↑ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026.	Restricted Stock Unit	8,450	—	—	8,450
2026-02-12	Murphy Nicole	Head of Pharm Ops and Tech	Buy↑	Common Stock	3	$195.04	$585	19,611
2026-02-09	Singhal Priya	Head of Development	Sell↓	Common Stock	2,660	$199.83	$531,548	8,043
2026-02-06	Grogan Jane	Head of Research	Tax↓	Common Stock	584	$201.18	$117,489	4,058
2026-02-06	Gregory Ginger	EVP, Human Resources	Convert↑	Common Stock	3,746	—	—	23,490
2026-02-06	Godbout Sean	Chief Accounting Officer	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/07/2024.	Restricted Stock Unit	305	—	—	305
2026-02-06	ALEXANDER SUSAN H	EVP Chief Legal Officer	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.	Restricted Stock Unit	4,916	—	—	9,834
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.	Restricted Stock Unit	3,043	—	—	6,087
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/08/2023.	Restricted Stock Unit	2,044	—	—	0
2026-02-06	ALEXANDER SUSAN H	EVP Chief Legal Officer	Tax↓	Common Stock	1,514	$201.18	$304,587	41,807
2026-02-06	Godbout Sean	Chief Accounting Officer	Convert↑	Common Stock	305	—	—	980
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Convert↑	Common Stock	3,043	—	—	11,786
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024.	Restricted Stock Unit	1,802	—	—	1,802
2026-02-06	Murphy Nicole	Head of Pharm Ops and Tech	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/8/2023.	Restricted Stock Unit	2,102	—	—	0
2026-02-06	Viehbacher Christopher	Director, President and CEO	Tax↓	Common Stock	4,356	$201.18	$876,340	21,095
2026-02-06	Singhal Priya	Head of Development	Tax↓	Common Stock	1,412	$201.18	$284,066	10,703
2026-02-06	Viehbacher Christopher	Director, President and CEO	Convert↑	Common Stock	9,008	—	—	25,451
2026-02-06	Izzar Rachid	Head of Global Product Strat.	Tax↓	Common Stock	775	$201.18	$155,915	11,011
2026-02-06	Gregory Ginger	EVP, Human Resources	Tax↓	Common Stock	1,132	$201.18	$227,736	22,358
2026-02-06	Viehbacher Christopher	Director, President and CEO	Convert↓ Filing footnotes — Restricted Stock Unit (Direct) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.	Restricted Stock Unit	15,453	—	—	30,907
2026-02-06	Gregory Ginger	EVP, Human Resources	Convert↑ Filing footnotes — Common Stock (Direct) Includes 166.6667 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2025.	Common Stock	1,635	—	—	19,399

Legend Buy — open-market purchase Sell — open-market sale ↑ Shares acquired ↓ Shares disposed (gift, conversion, tax…)

Showing 1–50 of 926 transactions

Key facts CIK 875045 CUSIP 09062X103 13F (30d) 23 filings 18 filers Visit website Investor relations