Biogen (BIIB) Institutional Ownership

$196.00 -0.39 (-0.20%)

Closing price 05/29/2026 04:00 PM Eastern

Extended Trading

$196.50 +0.50 (+0.26%)

As of 05/29/2026 07:43 PM Eastern

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Current Institutional Ownership Percentage: 87.93%
Number of Institutional Buyers (last 12 months): 630
Total Institutional Inflows (last 12 months): $3.75B

Number of Institutional Sellers (last 12 months): 365
Total Institutional Outflows (last 12 months): $2.39B

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BIIB Institutional Buying and Selling by Quarter

Biogen Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
5/26/2026	Glenmede Trust Co. NA	11,652	$2.14M	0.0%	+17.5%	0.008%
5/22/2026	Summitry LLC	4,737	$868K	0.0%	-1.2%	0.003%
5/22/2026	Groupama Asset Managment	8,753	$1.61M	0.0%	+3.8%	0.006%
5/22/2026	Segall Bryant & Hamill LLC	5,379	$1.03M	0.0%	N/A	0.004%
5/19/2026	Western Wealth Management LLC	1,183	$217K	0.0%	-5.7%	0.001%
5/19/2026	Bank of America Corp DE	1,156,369	$212.00M	0.0%	+2.4%	0.783%
5/19/2026	Kentucky Retirement Systems	19,502	$3.58M	0.1%	+112.6%	0.013%
5/19/2026	Janus Henderson Group PLC	18,975	$3.48M	0.0%	-6.3%	0.013%
5/19/2026	Bull Harbor Capital LLC	5,077	$931K	0.2%	N/A	0.003%
5/19/2026	Arkadios Wealth Advisors	4,781	$877K	0.0%	+4.5%	0.003%
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5/19/2026	Encore Global Management LP	500	$92K	0.1%	N/A	0.000%
5/18/2026	ADAR1 Capital Management LLC	11,000	$2.02M	0.1%	-54.7%	0.007%
5/18/2026	Amundi	790,827	$144.98M	0.0%	+38.2%	0.536%
5/18/2026	EverSource Wealth Advisors LLC	3,178	$583K	0.0%	+32.5%	0.002%
5/18/2026	California State Teachers Retirement System	220,687	$40.46M	0.0%	-2.5%	0.149%
5/18/2026	Royal Bank of Canada	531,377	$97.42M	0.0%	-1.9%	0.360%
5/18/2026	Richwood Investment Advisors LLC	2,032	$373K	0.3%	-4.2%	0.001%
5/18/2026	Empowered Funds LLC	21,775	$3.99M	0.0%	-62.4%	0.015%
5/16/2026	The Manufacturers Life Insurance Company	95,108	$17.44M	0.0%	-10.1%	0.064%
5/16/2026	Quantinno Capital Management LP	116,374	$21.34M	0.0%	+18.3%	0.079%
5/16/2026	SummitTX Capital L.P.	21,656	$3.97M	0.1%	N/A	0.015%
5/16/2026	Lazard Asset Management LLC	16,935	$3.11M	0.0%	-63.3%	0.011%
5/16/2026	Orbimed Advisors LLC	61,600	$11.29M	0.2%	N/A	0.042%
5/15/2026	OMERS ADMINISTRATION Corp	20,149	$3.69M	0.0%	+19.9%	0.014%
5/15/2026	Lombard Odier Asset Management Switzerland SA	3,899	$715K	0.0%	N/A	0.003%
5/15/2026	Waverly Advisors LLC	3,151	$578K	0.0%	+12.8%	0.002%
5/14/2026	Healthcare of Ontario Pension Plan Trust Fund	9,220	$1.69M	0.0%	-78.4%	0.006%
5/14/2026	Dai ichi Life Insurance Company Ltd	5,808	$1.07M	0.0%	-3.5%	0.004%
5/14/2026	Renaissance Technologies LLC	203,396	$37.29M	0.1%	-49.0%	0.138%
5/14/2026	Gabelli Funds LLC	14,100	$2.59M	0.0%	-8.4%	0.010%
5/14/2026	Morningstar Investment Management LLC	19,344	$3.55M	0.2%	+3.0%	0.013%
5/14/2026	Public Employees Retirement System of Ohio	46,062	$8.45M	0.0%	-2.8%	0.031%
5/14/2026	Compound Planning Inc.	2,742	$503K	0.0%	-16.4%	0.002%
5/14/2026	Inceptionr LLC	2,248	$412K	0.1%	-53.9%	0.002%
5/14/2026	Knott David M Jr	4,000	$733K	0.4%	-33.3%	0.003%
5/14/2026	Bank of Nova Scotia	20,436	$3.75M	0.0%	-10.0%	0.014%
5/14/2026	Systematic Financial Management LP	16,220	$2.97M	0.1%	-2.5%	0.011%
5/14/2026	Sei Investments Co.	71,513	$13.11M	0.0%	+20.2%	0.048%
5/14/2026	Lido Advisors LLC	4,432	$813K	0.0%	-26.0%	0.003%
5/13/2026	Cetera Investment Advisers	22,444	$4.12M	0.0%	-4.5%	0.015%
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5/13/2026	CI Investments Inc.	4,078	$748K	0.0%	-7.3%	0.003%
5/13/2026	First Trust Advisors LP	673,958	$123.56M	0.1%	+19.1%	0.456%
5/12/2026	Westpac Banking Corp	1,843	$338K	0.0%	-15.4%	0.001%
5/12/2026	ABN Amro Investment Solutions	5,976	$1.10M	0.0%	+23.8%	0.004%
5/8/2026	PNC Financial Services Group Inc.	39,484	$7.24M	0.0%	+2.0%	0.027%
5/8/2026	Oslo Pensjonsforsikring AS	1,840	$337K	0.1%	N/A	0.001%
5/8/2026	Andra AP fonden	52,000	$9.53M	0.1%	+1,980.0%	0.035%
5/8/2026	Wilkerson Advisory Group LLC	593	$109K	0.0%	+129.0%	0.000%
5/8/2026	Cassaday & Co Wealth Management LLC	218	$40K	0.0%	N/A	0.000%
5/8/2026	Convergence Investment Partners LLC	13,557	$2.49M	0.4%	+11.5%	0.009%
5/7/2026	Meeder Asset Management Inc.	1,071	$196K	0.0%	+395.8%	0.001%
5/7/2026	Meeder Advisory Services Inc.	4,721	$866K	0.0%	+1.2%	0.003%
5/7/2026	Dimensional Fund Advisors LP	1,079,119	$197.88M	0.0%	+12.3%	0.731%
5/7/2026	Parallel Advisors LLC	4,367	$801K	0.0%	+1.5%	0.003%
5/7/2026	AlphaCentric Advisors LLC	3,835	$703K	0.7%	+5.7%	0.003%
5/7/2026	KBC Group NV	234,692	$43.03M	0.1%	+339.5%	0.159%
5/7/2026	SEB Asset Management AB	41,869	$7.68M	0.0%	N/A	0.028%
5/7/2026	Swiss National Bank	430,600	$78.94M	0.0%	+7.2%	0.292%
5/7/2026	AIA Group Ltd	9,329	$1.71M	0.0%	+310.1%	0.006%
5/7/2026	Mediolanum International Funds Ltd	6,054	$1.14M	0.0%	N/A	0.004%
5/6/2026	California Public Employees Retirement System	340,903	$62.50M	0.0%	+3.1%	0.231%
5/6/2026	Kera Capital Partners Inc.	1,723	$316K	0.0%	+3.5%	0.001%
5/6/2026	Assetmark Inc.	2,690	$493K	0.0%	+12.5%	0.002%
5/6/2026	Bessemer Group Inc.	3,127	$573K	0.0%	+15.3%	0.002%
5/6/2026	SteelPeak Wealth LLC	2,704	$496K	0.0%	N/A	0.002%
5/6/2026	Independent Financial Group LLC	3,328	$610K	0.0%	N/A	0.002%
5/5/2026	Wealthfront Advisers LLC	15,679	$2.87M	0.0%	+0.8%	0.011%
5/5/2026	D.A. Davidson & CO.	1,218	$223K	0.0%	N/A	0.001%
5/5/2026	Twin Capital Management Inc.	4,430	$812K	0.1%	N/A	0.003%
5/5/2026	Bank of New York Mellon Corp	788,523	$144.56M	0.0%	-2.8%	0.534%
5/5/2026	Blackhawk Capital Partners LLC	2,426	$445K	0.2%	+16.2%	0.002%
5/5/2026	Illinois Municipal Retirement Fund	89,303	$16.37M	0.2%	+9.7%	0.060%
5/5/2026	Sanctuary Advisors LLC	5,617	$1.03M	0.0%	+8.6%	0.004%
5/5/2026	Sigma Planning Corp	7,201	$1.32M	0.0%	+37.3%	0.005%
5/5/2026	Roberts Glore & Co. Inc. IL	3,001	$550K	0.2%	-2.6%	0.002%
5/5/2026	Nwam LLC	1,141	$209K	0.0%	N/A	0.001%
5/5/2026	Maryland State Retirement & Pension System	7,095	$1.30M	0.0%	-3.9%	0.005%
5/4/2026	Canal Insurance CO	20,000	$3.67M	0.8%	N/A	0.014%
5/4/2026	Emerald Mutual Fund Advisers Trust	3,117	$571K	0.0%	+26.5%	0.002%
5/4/2026	Legacy Capital Group California Inc.	2,901	$532K	0.2%	N/A	0.002%
5/4/2026	Empirical Financial Services LLC d.b.a. Empirical Wealth Management	2,751	$504K	0.0%	+24.0%	0.002%
5/4/2026	State of Michigan Retirement System	43,003	$7.88M	0.0%	-0.2%	0.029%
5/4/2026	Principal Financial Group Inc.	187,059	$34.29M	0.0%	+1.6%	0.127%
5/4/2026	Chicago Partners Investment Group LLC	4,598	$874K	0.0%	+63.3%	0.003%
5/4/2026	Triglav Investments D.O.O.	12,428	$2.28M	0.2%	+2.5%	0.008%
5/4/2026	J. Safra Sarasin Holding AG	4,998	$915K	0.0%	-22.8%	0.003%
5/4/2026	Tradewinds LLC.	1,129	$211K	0.1%	N/A	0.001%
5/4/2026	Lifeworks Advisors LLC	3,465	$635K	0.1%	-11.9%	0.002%
5/4/2026	Procyon Advisors LLC	2,063	$378K	0.0%	+47.7%	0.001%
5/1/2026	Commonwealth of Pennsylvania Public School Empls Retrmt SYS	34,186	$6.27M	0.0%	+0.2%	0.023%
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5/1/2026	Citizens Financial Group Inc. RI	2,346	$430K	0.0%	+30.6%	0.002%
5/1/2026	Fifth Third Bancorp	32,716	$6.00M	0.0%	+255.1%	0.022%
5/1/2026	Simplicity Wealth LLC	2,149	$394K	0.0%	+10.1%	0.001%
5/1/2026	Candriam S.C.A.	381,768	$69.99M	0.4%	+15.5%	0.260%
5/1/2026	Sequoia Financial Advisors LLC	9,953	$1.83M	0.0%	-5.8%	0.007%
4/30/2026	Kestra Advisory Services LLC	5,810	$1.07M	0.0%	+28.9%	0.004%
4/30/2026	Sumitomo Mitsui Trust Group Inc.	356,291	$65.32M	0.0%	-3.9%	0.243%
4/30/2026	Resona Asset Management Co. Ltd.	46,261	$8.52M	0.0%	+2.4%	0.032%
4/30/2026	Munich Reinsurance Co Stock Corp in Munich	23,942	$4.39M	0.1%	N/A	0.016%
4/30/2026	Oregon Public Employees Retirement Fund	16,841	$3.09M	0.0%	+0.6%	0.011%

BIIB Institutional Ownership - Frequently Asked Questions

During the previous two years, 1,025 institutional investors and hedge funds held shares of Biogen. The most heavily invested institutionals were Vanguard Group Inc. ($3.07B), Primecap Management Co. CA ($2.60B), State Street Corp ($1.26B), Geode Capital Management LLC ($736.44M), International Assets Investment Management LLC ($695.87M), Wellington Management Group LLP ($624.99M), and Norges Bank ($464.41M).Learn more on Biogen's institutional investors.

87.93% of Biogen's stock is owned by institutional investors. Learn more on BIIB's institutional investor holdings.

Of the 906 institutional investors that purchased Biogen's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Norges Bank ($7.23M), Pacer Advisors Inc. ($2.78M), AQR Capital Management LLC ($1.75M), Boston Partners ($1.72M), Van ECK Associates Corp ($967.52K), Fred Alger Management LLC ($810.93K), and Invesco Ltd. ($788.39K).

Institutional investors have bought a total of 24,243,444 shares in the last 24 months. This purchase volume represents approximately $3.75B in transactions.

Of the 365 institutional investors that sold Biogen's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Wellington Management Group LLP ($1.25M), Primecap Management Co. CA ($1.19M), Amundi ($782.03K), Invesco Ltd. ($762.69K), Renaissance Technologies LLC ($761.01K), SG Americas Securities LLC ($697.49K), and Man Group plc ($578.74K).

Institutional investors have sold a total of 15,552,285 shares in the last 24 months. This volume of shares sold represents approximately $2.39B in transactions.

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This page (NASDAQ:BIIB) was last updated on 5/31/2026 by MarketBeat.com Staff.

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Biogen (BIIB) Institutional Ownership

BIIB Institutional Buying and Selling by Quarter

Biogen Major Shareholders & Ownership History

BIIB Institutional Ownership - Frequently Asked Questions

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Biogen (BIIB) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Biogen (NASDAQ:BIIB)

BIIB Institutional Buying and Selling by Quarter

Biogen Major Shareholders & Ownership History

BIIB Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of BIIB shares?

What percentage of Biogen's stock is owned by institutional investors?

Which institutional investors have been buying Biogen's stock?

How much institutional buying is happening at Biogen?

Which of Biogen's major shareholders have been selling company stock?

How much institutional selling is happening at Biogen?

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