BIIB Insider Trading

Insider Trading Chart
Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 0.18%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $1,683,325.55

Biogen Insider Trading History Chart

Biogen Share Price & Price History

^$181.98

▲ +1.23 (0.68%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

Biogen Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
9/2/2025	Priya Singhal	Insider	Sell	517	$133.55	$69,045.35	5,772
7/8/2025	Rachid Izzar	Insider	Sell	2,223	$135.00	$300,105.00	6,330
3/7/2025	Stephen A Sherwin	Director	Sell	8,760	$150.02	$1,314,175.20	11,318
9/3/2024	Priya Singhal	Insider	Sell	431	$204.22	$88,018.82	5,316
4/2/2024	Priya Singhal	Insider	Sell	93	$213.09	$19,817.37	4,886
2/22/2024	Priya Singhal	Insider	Sell	262	$221.23	$57,962.26	4,886
2/16/2024	Priya Singhal	Insider	Sell	108	$221.49	$23,920.92	5,148
2/15/2024	Eric K. Rowinsky	Director	Buy	455	$222.54	$101,255.70	20,629
2/12/2024	Priya Singhal	Insider	Sell	419	$239.45	$100,329.55	4,516
12/11/2023	Priya Singhal	Insider	Sell	110	$248.00	$27,280.00	3,464
9/5/2023	Priya Singhal	Insider	Sell	431	$269.43	$116,124.33	3,354
7/3/2023	Priya Singhal	Insider	Sell	81	$282.87	$22,912.47	2,924
4/28/2023	Ginger Gregory	EVP	Sell	2,681	$300.00	$804,300.00	8,483
4/4/2023	Priya Singhal	Insider	Sell	91	$277.11	$25,217.01	2,843
3/28/2023	Priya Singhal	Insider	Sell	568	$270.06	$153,394.08	2,842
11/14/2022	Ginger Gregory	EVP	Sell	5,610	$300.11	$1,683,617.10	5,711

SEC Filings (Institutional Ownership Changes) for Biogen (NASDAQ:BIIB)

87.93% of Biogen stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Biogen Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
12/2/2025	Allworth Financial LP	2,840	$0.40M	0.0%	+30.3%	0.002%
12/2/2025	Swiss Life Asset Management Ltd	40,445	$5.67M	0.0%	-35.2%	0.028%
12/1/2025	Groupama Asset Managment	8,524	$1.19M	0.0%	-4.4%	0.006%
11/25/2025	Court Place Advisors LLC	3,660	$0.51M	0.2%	-13.7%	0.002%
11/24/2025	CIBC Private Wealth Group LLC	1,189	$0.17M	0.0%	+8.1%	0.001%
11/21/2025	CIBC Bancorp USA Inc.	25,593	$3.59M	0.0%	N/A	0.017%
11/20/2025	Wilmington Savings Fund Society FSB	867	$0.12M	0.0%	-55.2%	0.001%
11/20/2025	Caerus Investment Advisors LLC	2,480	$0.35M	0.1%	N/A	0.002%
11/19/2025	Auxier Asset Management LLC	10,162	$1.42M	0.2%	-0.7%	0.007%
11/19/2025	Captrust Financial Advisors	16,532	$2.32M	0.0%	+13.3%	0.011%
11/19/2025	Coldstream Capital Management Inc.	4,480	$0.63M	0.0%	+38.0%	0.003%
11/19/2025	Danske Bank A S	44,710	$6.26M	0.0%	N/A	0.030%
11/19/2025	Caitong International Asset Management Co. Ltd	382	$54K	0.0%	N/A	0.000%
11/18/2025	Advisory Services Network LLC	1,792	$0.25M	0.0%	+3.9%	0.001%
11/18/2025	Cim Investment Management Inc.	2,844	$0.40M	0.1%	-50.7%	0.002%
11/18/2025	Livforsakringsbolaget Skandia Omsesidigt	1,330	$0.19M	0.0%	-7.0%	0.001%
11/17/2025	Camelot Portfolios LLC	2,100	$0.29M	0.2%	N/A	0.001%
11/17/2025	Jacobs Levy Equity Management Inc.	10,124	$1.42M	0.0%	-19.8%	0.007%
11/17/2025	Morningstar Investment Management LLC	18,779	$2.63M	0.1%	N/A	0.013%
11/17/2025	NewEdge Advisors LLC	9,138	$1.28M	0.0%	+241.9%	0.006%
11/17/2025	Krensavage Asset Management LLC	10,000	$1.40M	0.6%	N/A	0.007%
11/17/2025	CANADA LIFE ASSURANCE Co	135,657	$18.79M	0.0%	+3.6%	0.092%
11/17/2025	Woodline Partners LP	96,666	$13.54M	0.1%	+1.2%	0.066%
11/17/2025	Alyeska Investment Group L.P.	845,277	$118.41M	0.4%	+66.1%	0.576%
11/17/2025	United Capital Financial Advisors LLC	5,433	$0.76M	0.0%	+8.2%	0.004%
11/17/2025	Voleon Capital Management LP	2,253	$0.32M	0.0%	N/A	0.002%
11/17/2025	Verition Fund Management LLC	30,037	$4.21M	0.0%	+28.8%	0.020%
11/17/2025	Vestal Point Capital LP	275,000	$38.52M	1.7%	N/A	0.187%
11/17/2025	Tidal Investments LLC	25,036	$3.51M	0.0%	+13.9%	0.017%
11/17/2025	State Street Corp	7,319,749	$1.03B	0.0%	-2.0%	4.990%
11/17/2025	Shelton Capital Management	9,444	$1.32M	0.0%	-45.6%	0.006%
11/17/2025	Polymer Capital Management US LLC	2,674	$0.38M	0.0%	-28.9%	0.002%
11/17/2025	Public Employees Retirement System of Ohio	49,029	$6.87M	0.0%	+8.1%	0.033%
11/17/2025	Palo Alto Investors LP	185,661	$26.01M	4.8%	-9.8%	0.127%
11/17/2025	Parkman Healthcare Partners LLC	130,165	$18.23M	1.9%	N/A	0.089%
11/17/2025	Northwestern Mutual Wealth Management Co.	5,930	$0.83M	0.0%	+2.2%	0.004%
11/17/2025	Northern Trust Corp	1,499,332	$210.03M	0.0%	-2.4%	1.022%
11/17/2025	Norinchukin Bank The	12,628	$1.77M	0.0%	+1.1%	0.009%
11/17/2025	Mariner LLC	47,514	$6.66M	0.0%	+32.3%	0.032%
11/17/2025	National Bank of Canada FI	73,117	$10.24M	0.0%	-48.9%	0.050%
11/17/2025	Mercer Global Advisors Inc. ADV	40,535	$5.68M	0.0%	+7.8%	0.028%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	136,860	$19.17M	0.0%	-2.1%	0.093%
11/17/2025	Laird Norton Wetherby Wealth Management LLC	3,832	$0.54M	0.0%	-8.4%	0.003%
11/17/2025	Larson Financial Group LLC	638	$89K	0.0%	+23.4%	0.000%
11/17/2025	Lido Advisors LLC	6,299	$0.88M	0.0%	+22.4%	0.004%
11/17/2025	Lighthouse Investment Partners LLC	28,000	$3.92M	0.1%	N/A	0.019%
11/17/2025	Integrated Wealth Concepts LLC	4,387	$0.61M	0.0%	+18.9%	0.003%
11/17/2025	Hillman Capital Management Inc.	38,354	$5.37M	3.1%	-8.6%	0.026%
11/17/2025	Holocene Advisors LP	5,979	$0.84M	0.0%	N/A	0.004%
11/17/2025	Humankind Investments LLC	2,867	$0.40M	0.1%	-5.7%	0.002%
11/17/2025	Gotham Asset Management LLC	270,498	$37.89M	0.2%	+65.5%	0.184%
11/17/2025	Fred Alger Management LLC	2,039	$0.29M	0.0%	N/A	0.001%
11/17/2025	Focus Partners Wealth	9,917	$1.41M	0.0%	+47.8%	0.007%
11/17/2025	Brevan Howard Capital Management LP	33,511	$4.69M	0.0%	+149.0%	0.023%
11/17/2025	CSM Advisors LLC	7,971	$1.12M	0.0%	-71.0%	0.005%
11/17/2025	Capula Management Ltd	10,208	$1.43M	0.0%	N/A	0.007%
11/17/2025	Chevy Chase Trust Holdings LLC	75,171	$10.53M	0.0%	-3.3%	0.051%
11/17/2025	Cinctive Capital Management LP	65,837	$9.22M	0.4%	+344.8%	0.045%
11/17/2025	Banco Bilbao Vizcaya Argentaria S.A.	138,654	$19.40M	0.1%	+20.7%	0.095%
11/17/2025	California Public Employees Retirement System	343,786	$48.16M	0.0%	+1.4%	0.234%
11/17/2025	Bank of Nova Scotia	24,351	$3.41M	0.0%	+49.1%	0.017%
11/17/2025	Boothbay Fund Management LLC	5,500	$0.77M	0.0%	-49.6%	0.004%
11/17/2025	Alliancebernstein L.P.	237,275	$33.24M	0.0%	+2.7%	0.162%
11/17/2025	Ameriprise Financial Inc.	145,409	$20.37M	0.0%	+15.4%	0.099%
11/14/2025	Schonfeld Strategic Advisors LLC	320,154	$44.85M	0.3%	+400.3%	0.218%
11/14/2025	Creative Planning	68,583	$9.61M	0.0%	+23.8%	0.047%
11/14/2025	Lazard Asset Management LLC	56,836	$7.96M	0.0%	-2.2%	0.039%
11/14/2025	SummitTX Capital L.P.	17,379	$2.43M	0.1%	-68.4%	0.012%
11/14/2025	AQR Capital Management LLC	1,783,581	$248.81M	0.2%	+30.7%	1.216%
11/14/2025	Credit Agricole S A	37,452	$5.25M	0.0%	N/A	0.026%
11/14/2025	Raymond James Financial Inc.	53,342	$7.47M	0.0%	+2.6%	0.036%
11/14/2025	Bellevue Group AG	4,213	$0.59M	0.0%	+948.0%	0.003%
11/14/2025	Amundi	618,309	$95.25M	0.0%	+6.6%	0.421%
11/14/2025	Caisse de depot et placement du Quebec	569,253	$79.74M	0.1%	+718.2%	0.388%
11/14/2025	Freestone Grove Partners LP	218,866	$30.66M	0.2%	+97.2%	0.149%
11/14/2025	Man Group plc	918,025	$128.60M	0.2%	+15.7%	0.626%
11/14/2025	California State Teachers Retirement System	234,818	$32.89M	0.0%	-1.6%	0.160%
11/14/2025	Daiwa Securities Group Inc.	44,075	$6.17M	0.0%	+12.6%	0.030%
11/14/2025	Horizon Investments LLC	61,049	$8.55M	0.1%	-0.4%	0.042%
11/14/2025	ADAR1 Capital Management LLC	18,000	$2.52M	0.2%	+252.9%	0.012%
11/14/2025	Zurcher Kantonalbank Zurich Cantonalbank	348,404	$48.80M	0.1%	+425.3%	0.237%
11/14/2025	Shay Capital LLC	9,000	$1.26M	0.1%	N/A	0.006%
11/14/2025	Brooklyn Investment Group	5,103	$0.72M	0.0%	+20.0%	0.003%
11/14/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	1,439,208	$201.60M	0.0%	-17.4%	0.981%
11/14/2025	Tower Research Capital LLC TRC	3,475	$0.49M	0.0%	+19.3%	0.002%
11/14/2025	Two Sigma Investments LP	205,233	$28.75M	0.0%	-59.6%	0.140%
11/14/2025	Vident Advisory LLC	4,997	$0.70M	0.0%	-1.3%	0.003%
11/14/2025	Ossiam	65,603	$9.19M	0.1%	+29.9%	0.045%
11/14/2025	Suvretta Capital Management LLC	168,190	$23.56M	0.6%	+10.7%	0.115%
11/14/2025	iSAM Funds UK Ltd	17,191	$2.41M	0.5%	+279.9%	0.012%
11/14/2025	Wellington Management Group LLP	4,246,504	$594.85M	0.1%	-11.5%	2.895%
11/14/2025	NorthRock Partners LLC	3,596	$0.50M	0.0%	+15.4%	0.002%
11/14/2025	Harvest Fund Management Co. Ltd	8,998	$1.26M	0.1%	+8.2%	0.006%
11/14/2025	Comerica Bank	33,670	$4.72M	0.0%	+59.5%	0.023%
11/14/2025	Brown Brothers Harriman & Co.	4,696	$0.66M	0.0%	-8.3%	0.003%
11/14/2025	Glenmede Investment Management LP	25,891	$3.63M	0.0%	-1.7%	0.018%
11/13/2025	Pathstone Holdings LLC	12,984	$1.82M	0.0%	+12.0%	0.009%
11/13/2025	BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp	21,058	$2.95M	0.0%	-8.6%	0.014%
11/13/2025	Guardian Investment Management	5,400	$0.76M	0.7%	+1.9%	0.004%
11/13/2025	Kentucky Retirement Systems Insurance Trust Fund	3,844	$0.54M	0.0%	-3.0%	0.003%

Data available starting January 2016

Biogen Inc. discovers, develops, manufactures, and delivers therapies for treating neurological and neurodegenerative diseases in the United States, Europe, Germany, Asia, and internationally. The company provides TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI, and FAMPYRA for multiple sclerosis (MS); SPINRAZA for spinal muscular atrophy; ADUHELM to treat Alzheimer's disease; FUMADERM to treat plaque psoriasis; BENEPALI, an etanercept biosimilar referencing ENBREL; IMRALDI, an adalimumab biosimilar referencing HUMIRA; FLIXABI, an infliximab biosimilar referencing REMICADE; and BYOOVIZ, a ranibizumab biosimilar referencing LUCENTIS. It offers RITUXAN for treating non-Hodgkin's lymphoma, chronic lymphocytic leukemia (CLL), rheumatoid arthritis, two forms of ANCA-associated vasculitis, and pemphigus vulgaris; RITUXAN HYCELA for non-Hodgkin's lymphoma and CLL; GAZYVA to treat CLL and follicular lymphoma; OCREVUS for relapsing MS and primary progressive MS; LUNSUMIO to treat relapsed or refractory follicular lymphoma; glofitamab for non-Hodgkin's lymphoma; and other anti-CD20 therapies. In addition, the company is developing various products for the treatment of MS, Alzheimer's disease and dementia, neuromuscular disorders, Parkinson's disease and movement disorders, neuropsychiatry, genetic neurodevelopmental disorders, and biosimilars, which are under various stages of development. It has collaboration and license agreements with Acorda Therapeutics, Inc.; Alkermes Pharma Ireland Limited; Denali Therapeutics Inc.; Eisai Co., Ltd.; Genentech, Inc.; Neurimmune SubOne AG; Ionis Pharmaceuticals, Inc.; Samsung Bioepis Co., Ltd.; Sangamo Therapeutics, Inc.; and Sage Therapeutics, Inc., as well as collaboration with Fujirebio to potentially identify and develop blood-based biomarkers for tau pathology in the brain. The company was founded in 1978 and is headquartered in Cambridge, Massachusetts.

Today's Range

Now: $181.98

$179.27

$182.69

50 Day Range

MA: $157.91

$137.37

$181.98

52 Week Range

Now: $181.98

$110.04

$185.17

Volume

1,233,937 shs

Average Volume

1,905,301 shs

Market Capitalization

$26.70 billion

P/E Ratio

16.59

Dividend Yield

N/A

Beta

0.13

Who are the company insiders with the largest holdings of Biogen?: Biogen's top insider shareholders include:
Eric K Rowinsky (Director)
Stephen A Sherwin (Director)
Rachid Izzar (Insider)
Priya Singhal (Insider)
Learn More about top insider investors at Biogen.
Who are the major institutional investors of Biogen?: Biogen's top institutional investors include:
Vanguard Group Inc. — 11.79%
Primecap Management Co. CA — 10.19%
State Street Corp — 4.99%
Wellington Management Group LLP — 2.89%
Invesco Ltd. — 1.65%
AQR Capital Management LLC — 1.22%
Learn More about top institutional investors of Biogen stock.
Which major investors are selling Biogen stock?: Within the last quarter, BIIB stock was sold by these institutional investors:
Primecap Management Co. CA
Wellington Management Group LLP
UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC
Two Sigma Investments LP
State of Michigan Retirement System
Arrowstreet Capital Limited Partnership
Group One Trading LLC
State Street Corp
During the previous year, company insiders that have sold Biogen company stock include:
Eric K Rowinsky (Director)
Stephen A Sherwin (Director)
Rachid Izzar (Insider)
Learn More investors selling Biogen stock.
Which major investors are buying Biogen stock?: During the last quarter, BIIB stock was bought by institutional investors including:
Caisse de depot et placement du Quebec
AQR Capital Management LLC
Alyeska Investment Group L.P.
Zurcher Kantonalbank Zurich Cantonalbank
Vestal Point Capital LP
Schonfeld Strategic Advisors LLC
Robeco Institutional Asset Management B.V.
Millennium Management LLC