Biogen Inc (BIIB) · Insider trading

What Biogen's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months

$585

1 insider, 1 trade

Sold, 12 months

$905,414

2 insiders, 100% under a plan

Net, 12 months

−$904,829

bought less sold

Latest filing

2026-10-05

filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

Bought Sold Largest month: $1.31M

Who traded, two years

Insider	Bought	Sold	Trades	Last trade	Holds after
Sherwin Stephen ADirector	–	$1.31M	1	2025-03-07	11,318
Singhal PriyaHead of Development	–	$1.23M	5	2026-02-09	8,043
Izzar RachidHead of Global Product Strat.	–	$300,105	1	2025-07-08	6,330
Minor LloydDirector	–	$239,750	2	2026-08-04	2,689
Dorsa CarolineDirector	$151,559	–	1	2025-05-02	27,842
Murphy NicoleHead of Pharm Ops and Tech	$585	–	1	2026-02-12	19,611

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

Date	Insider	Trade	Shares	Price	Value	Holds after	Filing
2026-08-04	Minor LloydDirector	Saleplan	593	200.96	$119,169	2,689	Form 4
2026-08-03	Minor LloydDirector	Saleplan	593	203.34	$120,581	3,282	Form 4
2026-02-12	Murphy NicoleHead of Pharm Ops and Tech	Buy	3	195.04	$585	19,611	Form 4
2026-02-09	Singhal PriyaHead of Development	Saleplan	2,660	199.83	$531,548	8,043	Form 4
2026-02-02	Singhal PriyaHead of Development	Saleplan	748	179.30	$134,116	6,271	Form 4
2025-09-02	Singhal PriyaHead of Development	Saleplan	517	133.55	$69,045	5,772	Form 4
2025-07-08	Izzar RachidHead of Global Product Strat.	Saleplan	2,223	135.00	$300,105	6,330	Form 4
2025-05-19	Singhal PriyaHead of Development	Saleplan	3,806	126.25	$480,508	5,427	Form 4
2025-05-02	Dorsa CarolineDirector	Buy	1,235	122.72	$151,559	27,842	Form 4
2025-03-07	Sherwin Stephen ADirector	Saleplan	8,760	150.02	$1.31M	11,318	Form 4
2024-12-09	Singhal PriyaHead of Development	Saleplan	110	157.21	$17,293	5,426	Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

63 × option exercise62 × shares withheld for tax18 × grant or award2 × gift

Show them

Date	Insider	What	Shares	Price	Holds after	Filing
2026-10-02	Godbout SeanChief Accounting Officer	Option exercise M	+27	–	1,467	Form 4
2026-10-02	Godbout SeanChief Accounting Officer	Shares withheld for tax F	−8	219.88	1,459	Form 4
2026-06-09	Freire Maria CDirector	Grant or award A	+2,005	–	8,820	Form 4
2026-06-09	Minor LloydDirector	Grant or award A	+1,505	–	3,875	Form 4
2026-06-09	Pangalos Menelas NDirector	Option exercise M	+2,370	–	2,370	Form 4
2026-06-09	Pangalos Menelas NDirector	Grant or award A	+1,505	–	3,875	Form 4
2026-06-09	Patolawala Monish DDirector	Grant or award A	+1,505	–	5,215	Form 4
2026-06-09	Langer SusanDirector	Grant or award A	+1,505	–	6,634	Form 4
2026-06-09	Mantas Jesus BDirector	Grant or award A	+1,505	–	11,263	Form 4
2026-06-09	Rowinsky Eric KDirector	Grant or award A	+1,505	–	25,844	Form 4
2026-06-09	Sherwin Stephen ADirector	Grant or award A	+1,505	–	15,193	Form 4
2026-06-09	Hawkins William ADirector	Grant or award A	+1,505	–	10,365	Form 4
2026-05-01	Keeney AdamHead of Corporate Development	Option exercise M	+939	–	6,820	Form 4
2026-05-01	Keeney AdamHead of Corporate Development	Shares withheld for tax F	−455	187.06	6,365	Form 4
2026-04-01	Godbout SeanChief Accounting Officer	Option exercise M	+181	–	1,396	Form 4
2026-04-01	Godbout SeanChief Accounting Officer	Shares withheld for tax F	−54	183.78	1,342	Form 4
2026-02-06	Alexander Susan HEVP Chief Legal Officer	Option exercise M	+2,190	–	38,455	Form 4
2026-02-06	Alexander Susan HEVP Chief Legal Officer	Shares withheld for tax F	−1,059	201.18	37,396	Form 4
2026-02-06	Alexander Susan HEVP Chief Legal Officer	Option exercise M	+1,940	–	39,336	Form 4
2026-02-06	Alexander Susan HEVP Chief Legal Officer	Shares withheld for tax F	−931	201.18	38,405	Form 4
2026-02-06	Alexander Susan HEVP Chief Legal Officer	Option exercise M	+4,916	–	43,321	Form 4
2026-02-06	Alexander Susan HEVP Chief Legal Officer	Shares withheld for tax F	−1,514	201.18	41,807	Form 4
2026-02-06	Godbout SeanChief Accounting Officer	Option exercise M	+257	–	752	Form 4
2026-02-06	Godbout SeanChief Accounting Officer	Shares withheld for tax F	−76	201.18	676	Form 4
2026-02-06	Godbout SeanChief Accounting Officer	Option exercise M	+305	–	981	Form 4
2026-02-06	Godbout SeanChief Accounting Officer	Shares withheld for tax F	−103	201.18	878	Form 4
2026-02-06	Godbout SeanChief Accounting Officer	Option exercise M	+517	–	1,395	Form 4
2026-02-06	Godbout SeanChief Accounting Officer	Shares withheld for tax F	−180	201.18	1,215	Form 4
2026-02-06	Gregory GingerEVP, Human Resources	Option exercise M	+1,635	–	19,400	Form 4
2026-02-06	Gregory GingerEVP, Human Resources	Shares withheld for tax F	−791	201.18	18,609	Form 4
2026-02-06	Gregory GingerEVP, Human Resources	Option exercise M	+1,802	–	20,411	Form 4
2026-02-06	Gregory GingerEVP, Human Resources	Shares withheld for tax F	−666	201.18	19,745	Form 4
2026-02-06	Gregory GingerEVP, Human Resources	Option exercise M	+3,746	–	23,491	Form 4
2026-02-06	Gregory GingerEVP, Human Resources	Shares withheld for tax F	−1,132	201.18	22,359	Form 4
2026-02-06	Grogan JaneHead of Research	Option exercise M	+1,385	–	3,176	Form 4
2026-02-06	Grogan JaneHead of Research	Shares withheld for tax F	−407	201.18	2,769	Form 4
2026-02-06	Grogan JaneHead of Research	Option exercise M	+1,873	–	4,642	Form 4
2026-02-06	Grogan JaneHead of Research	Shares withheld for tax F	−584	201.18	4,058	Form 4
2026-02-06	Izzar RachidHead of Global Product Strat.	Option exercise M	+2,044	–	8,204	Form 4
2026-02-06	Izzar RachidHead of Global Product Strat.	Shares withheld for tax F	−805	201.18	7,399	Form 4
2026-02-06	Izzar RachidHead of Global Product Strat.	Option exercise M	+1,802	–	9,201	Form 4
2026-02-06	Izzar RachidHead of Global Product Strat.	Shares withheld for tax F	−458	201.18	8,743	Form 4
2026-02-06	Izzar RachidHead of Global Product Strat.	Option exercise M	+3,043	–	11,786	Form 4
2026-02-06	Izzar RachidHead of Global Product Strat.	Shares withheld for tax F	−775	201.18	11,011	Form 4
2026-02-06	Keeney AdamHead of Corporate Development	Option exercise M	+1,802	–	4,186	Form 4
2026-02-06	Keeney AdamHead of Corporate Development	Shares withheld for tax F	−589	201.18	3,597	Form 4
2026-02-06	Keeney AdamHead of Corporate Development	Option exercise M	+3,278	–	6,875	Form 4
2026-02-06	Keeney AdamHead of Corporate Development	Shares withheld for tax F	−994	201.18	5,881	Form 4
2026-02-06	Kramer RobinChief Financial Officer	Option exercise M	+789	–	8,801	Form 4
2026-02-06	Kramer RobinChief Financial Officer	Shares withheld for tax F	−273	201.18	8,528	Form 4
2026-02-06	Kramer RobinChief Financial Officer	Option exercise M	+703	–	9,231	Form 4
2026-02-06	Kramer RobinChief Financial Officer	Shares withheld for tax F	−207	201.18	9,024	Form 4
2026-02-06	Kramer RobinChief Financial Officer	Option exercise M	+3,511	–	12,535	Form 4
2026-02-06	Kramer RobinChief Financial Officer	Shares withheld for tax F	−1,063	201.18	11,472	Form 4
2026-02-06	Murphy NicoleHead of Pharm Ops and Tech	Option exercise M	+2,102	–	16,324	Form 4
2026-02-06	Murphy NicoleHead of Pharm Ops and Tech	Shares withheld for tax F	−1,017	201.18	15,307	Form 4
2026-02-06	Murphy NicoleHead of Pharm Ops and Tech	Option exercise M	+1,940	–	17,247	Form 4
2026-02-06	Murphy NicoleHead of Pharm Ops and Tech	Shares withheld for tax F	−914	201.18	16,333	Form 4
2026-02-06	Murphy NicoleHead of Pharm Ops and Tech	Option exercise M	+4,683	–	21,016	Form 4
2026-02-06	Murphy NicoleHead of Pharm Ops and Tech	Shares withheld for tax F	−1,408	201.18	19,608	Form 4
2026-02-06	Singhal PriyaHead of Development	Option exercise M	+2,217	–	8,488	Form 4
2026-02-06	Singhal PriyaHead of Development	Shares withheld for tax F	−1,056	201.18	7,432	Form 4
2026-02-06	Singhal PriyaHead of Development	Option exercise M	+4,683	–	12,115	Form 4
2026-02-06	Singhal PriyaHead of Development	Shares withheld for tax F	−1,412	201.18	10,703	Form 4
2026-02-06	Viehbacher ChristopherDirector, President and CEO	Option exercise M	+9,008	–	25,451	Form 4
2026-02-06	Viehbacher ChristopherDirector, President and CEO	Shares withheld for tax F	−4,356	201.18	21,095	Form 4
2026-02-06	Viehbacher ChristopherDirector, President and CEO	Option exercise M	+15,453	–	36,548	Form 4
2026-02-06	Viehbacher ChristopherDirector, President and CEO	Shares withheld for tax F	−6,624	201.18	29,924	Form 4
2026-01-30	Singhal PriyaHead of Development	Option exercise M	+1,829	–	7,601	Form 4
2026-01-30	Singhal PriyaHead of Development	Shares withheld for tax F	−582	179.89	7,019	Form 4
2025-12-01	Viehbacher ChristopherDirector, President and CEO	Option exercise M	+7,040	–	19,847	Form 4
2025-12-01	Viehbacher ChristopherDirector, President and CEO	Shares withheld for tax F	−3,404	177.78	16,443	Form 4
2025-10-31	Grogan JaneHead of Research	Option exercise M	+695	–	2,128	Form 4
2025-10-31	Grogan JaneHead of Research	Shares withheld for tax F	−337	154.27	1,791	Form 4
2025-10-02	Godbout SeanChief Accounting Officer	Option exercise M	+26	–	503	Form 4
2025-10-02	Godbout SeanChief Accounting Officer	Shares withheld for tax F	−8	155.25	495	Form 4
2025-08-29	Singhal PriyaHead of Development	Option exercise M	+1,669	–	7,096	Form 4
2025-08-29	Singhal PriyaHead of Development	Shares withheld for tax F	−807	132.22	6,289	Form 4
2025-06-17	Dorsa CarolineDirector	Grant or award A	+3,160	–	31,002	Form 4
2025-06-17	Langer SusanDirector	Grant or award A	+2,370	–	5,129	Form 4
2025-06-17	Sherwin Stephen ADirector	Grant or award A	+2,370	–	13,688	Form 4
2025-06-17	Rowinsky Eric KDirector	Grant or award A	+2,370	–	24,339	Form 4
2025-06-17	Freire Maria CDirector	Grant or award A	+2,370	–	6,815	Form 4
2025-06-17	Hawkins William ADirector	Grant or award A	+2,370	–	8,860	Form 4
2025-06-17	Mantas Jesus BDirector	Grant or award A	+2,370	–	9,758	Form 4
2025-06-17	Patolawala Monish DDirector	Grant or award A	+2,370	–	3,710	Form 4
2025-06-17	Minor LloydDirector	Grant or award A	+2,370	–	2,370	Form 4
2025-05-01	Keeney AdamHead of Corporate Development	Option exercise M	+938	–	2,838	Form 4
2025-05-01	Keeney AdamHead of Corporate Development	Shares withheld for tax F	−454	120.93	2,384	Form 4
2025-02-10	Izzar RachidHead of Global Product Strat.	Option exercise M	+1,515	–	8,998	Form 4
2025-02-10	Izzar RachidHead of Global Product Strat.	Shares withheld for tax F	−445	142.54	8,553	Form 4
2025-02-10	Alexander Susan HEVP Chief Legal Officer	Option exercise M	+2,575	–	37,072	Form 4
2025-02-10	Alexander Susan HEVP Chief Legal Officer	Shares withheld for tax F	−807	142.54	36,265	Form 4
2025-02-10	Gregory GingerEVP, Human Resources	Option exercise M	+2,159	–	18,232	Form 4
2025-02-10	Gregory GingerEVP, Human Resources	Shares withheld for tax F	−634	142.54	17,598	Form 4
2025-02-10	Kramer RobinChief Accounting Officer	Option exercise M	+834	–	8,257	Form 4
2025-02-10	Kramer RobinChief Accounting Officer	Shares withheld for tax F	−245	142.54	8,012	Form 4
2025-02-10	McDonnell Michael REVP, Chief Financial Officer	Option exercise M	+3,257	–	25,712	Form 4
2025-02-10	McDonnell Michael REVP, Chief Financial Officer	Shares withheld for tax F	−1,371	142.54	24,341	Form 4
2025-02-10	Murphy NicoleHead of Pharm Ops and Tech	Option exercise M	+2,272	–	14,725	Form 4
2025-02-10	Murphy NicoleHead of Pharm Ops and Tech	Shares withheld for tax F	−670	142.54	14,055	Form 4
2025-02-10	Singhal PriyaHead of Development	Option exercise M	+1,212	–	9,423	Form 4
2025-02-10	Singhal PriyaHead of Development	Shares withheld for tax F	−357	142.54	9,066	Form 4
2025-02-07	Izzar RachidHead of Global Product Strat.	Option exercise M	+2,043	–	7,224	Form 4
2025-02-07	Izzar RachidHead of Global Product Strat.	Shares withheld for tax F	−600	141.35	6,624	Form 4
2025-02-07	Izzar RachidHead of Global Product Strat.	Shares withheld for tax F	−565	141.35	6,059	Form 4
2025-02-07	Izzar RachidHead of Global Product Strat.	Option exercise M	+1,801	–	7,860	Form 4
2025-02-07	Alexander Susan HEVP Chief Legal Officer	Option exercise M	+2,190	–	33,791	Form 4
2025-02-07	Alexander Susan HEVP Chief Legal Officer	Shares withheld for tax F	−643	141.35	33,148	Form 4
2025-02-07	Alexander Susan HEVP Chief Legal Officer	Option exercise M	+1,940	–	35,088	Form 4
2025-02-07	Alexander Susan HEVP Chief Legal Officer	Shares withheld for tax F	−591	141.35	34,497	Form 4
2025-02-07	Gregory GingerEVP, Human Resources	Option exercise M	+1,635	–	15,312	Form 4
2025-02-07	Gregory GingerEVP, Human Resources	Shares withheld for tax F	−480	141.35	14,832	Form 4
2025-02-07	Gregory GingerEVP, Human Resources	Option exercise M	+1,801	–	16,633	Form 4
2025-02-07	Gregory GingerEVP, Human Resources	Shares withheld for tax F	−560	141.35	16,073	Form 4
2025-02-07	Singhal PriyaHead of Development	Option exercise M	+2,216	–	8,892	Form 4
2025-02-07	Singhal PriyaHead of Development	Shares withheld for tax F	−681	141.35	8,211	Form 4
2025-02-07	Murphy NicoleHead of Pharm Ops and Tech	Option exercise M	+2,102	–	11,736	Form 4
2025-02-07	Murphy NicoleHead of Pharm Ops and Tech	Shares withheld for tax F	−620	141.35	11,116	Form 4
2025-02-07	Murphy NicoleHead of Pharm Ops and Tech	Option exercise M	+1,940	–	13,056	Form 4
2025-02-07	Murphy NicoleHead of Pharm Ops and Tech	Shares withheld for tax F	−603	141.35	12,453	Form 4
2025-02-07	Kramer RobinChief Accounting Officer	Option exercise M	+788	–	7,196	Form 4
2025-02-07	Kramer RobinChief Accounting Officer	Shares withheld for tax F	−232	141.35	6,964	Form 4
2025-02-07	Kramer RobinChief Accounting Officer	Option exercise M	+703	–	7,667	Form 4
2025-02-07	Kramer RobinChief Accounting Officer	Shares withheld for tax F	−244	141.35	7,423	Form 4
2025-02-07	Keeney AdamHead of Corporate Development	Option exercise M	+1,801	–	2,463	Form 4
2025-02-07	Keeney AdamHead of Corporate Development	Shares withheld for tax F	−563	141.35	1,900	Form 4
2025-02-07	Grogan JaneHead of Research	Option exercise M	+1,385	–	1,876	Form 4
2025-02-07	Grogan JaneHead of Research	Shares withheld for tax F	−443	141.35	1,433	Form 4
2025-02-07	Viehbacher ChristopherDirector, President and CEO	Option exercise M	+9,008	–	16,008	Form 4
2025-02-07	Viehbacher ChristopherDirector, President and CEO	Shares withheld for tax F	−3,201	141.35	12,807	Form 4
2025-02-07	McDonnell Michael REVP, Chief Financial Officer	Option exercise M	+2,335	–	21,741	Form 4
2025-02-07	McDonnell Michael REVP, Chief Financial Officer	Shares withheld for tax F	−786	141.35	20,955	Form 4
2025-02-07	McDonnell Michael REVP, Chief Financial Officer	Option exercise M	+2,216	–	23,171	Form 4
2025-02-07	McDonnell Michael REVP, Chief Financial Officer	Shares withheld for tax F	−716	141.35	22,455	Form 4
2025-01-31	Singhal PriyaHead of Development	Option exercise M	+1,828	–	7,254	Form 4
2025-01-31	Singhal PriyaHead of Development	Shares withheld for tax F	−578	143.93	6,676	Form 4
2024-12-06	Kramer RobinChief Accounting Officer	Option exercise M	+351	–	6,578	Form 4
2024-12-06	Kramer RobinChief Accounting Officer	Shares withheld for tax F	−170	157.78	6,408	Form 4
2024-12-06	Singhal PriyaHead of Development	Option exercise M	+426	–	5,742	Form 4
2024-12-06	Singhal PriyaHead of Development	Shares withheld for tax F	−206	157.78	5,536	Form 4
2024-11-05	Alexander Susan HEVP Chief Legal Officer	Gift G	−20,082	–	31,601	Form 4
2024-11-05	Alexander Susan HEVP Chief Legal Officer	Gift G	+20,082	–	20,082	Form 4
2024-11-01	Grogan JaneHead of Research	Option exercise M	+695	–	695	Form 4
2024-11-01	Grogan JaneHead of Research	Shares withheld for tax F	−204	173.79	491	Form 4

How to read it

Buy, sale: Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan: A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after: The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value: Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

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