Biogen (BIIB) Ownership - Who Owns Biogen?

5,004 Followers

Biogen (BIIB) Ownership Overview

0.19% Insiders

34.80% Mutual Funds

0.64% Other Institutional Investors

28.28% ETFs

36.10% Public Companies and Individual Investors

The ownership structure of Biogen (BIIB) stock is a mix of institutional, retail, and individual investors. Approximately 63.71% of the company’s stock is owned by Institutional Investors, 0.19% is owned by Insiders, and 36.10% is owned by Public Companies and Individual Investors.

The ownership structure of Biogen (BIIB) stock is a mix of institutional, retail, and individual investors. Approximately 35.43% of the company’s stock is owned by Institutional Investors, 0.19% is owned by Insiders, and 28.28% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date	Name	Activity	Value
Feb 17, 2026	Nicole Murphy	xxxxxxxxxxxxx	$585
Feb 10, 2026	Priya Singhal	xxxxxxxxxxxxx	$531548
Feb 03, 2026	Priya Singhal	xxxxxxxxxxxxx	$134116
Sep 02, 2025	Priya Singhal	xxxxxxxxxxxxx	$69045

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Recent Hedge Fund Trading Activity

Date	Firm	Activity	Value
Dec 31, 2023	Causeway Capital Management Llc	xxxxxxxxxxxxx	$91708565
Dec 31, 2023	Glenview Capital Management Llc	xxxxxxxxxxxxx	$51143574
Dec 31, 2023	Auxier Asset Management	xxxxxxxxxxxxx	$1568247
Dec 31, 2023	Primecap Management Co	xxxxxxxxxxxxx	$2597259892

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Top Shareholders

Holder	# of Shares	Type	% Holding	Value
	15,349,485	Institution	10.46%	2,746,943,836
Theofanis Kolokotrones	14,757,997	Institution	10.06%	2,641,091,143
	13,952,728	Institution	9.51%	2,496,980,203
	9,666,196	Institution	6.59%	1,729,862,436
	8,359,880	Institution	5.70%	1,496,084,125
	6,171,213	Institution	4.21%	1,104,400,278
	2,913,639	Institution	1.99%	521,424,835
	2,676,311	Institution	1.82%	478,952,617
	2,569,951	Institution	1.75%	459,918,431
	2,332,567	Institution	1.59%	417,436,190

Top Mutual Fund Holders

# of Shares	Type	% Holding	Value
13,952,728	Institution	9.51%	2,496,980,203
8,359,880	Institution	5.70%	1,496,084,125
2,913,639	Institution	1.99%	521,424,835
2,676,311	Institution	1.82%	478,952,617
2,569,951	Institution	1.75%	459,918,431
2,332,567	Institution	1.59%	417,436,190
1,861,140	Institution	1.27%	333,069,614
1,316,936	Institution	0.90%	235,678,867
1,054,404	Institution	0.72%	188,696,140
1,051,820	Institution	0.72%	188,233,707

Top ETF Holders

Holder	# of Shares	Type	% Holding	Value
Vanguard Total Stock Market ETF	4,641,443	Institution	3.16%	890,321,596
Vanguard S&P 500 ETF	3,773,337	Institution	2.57%	723,801,503
Vanguard Mid-Cap ETF	3,188,341	Institution	2.17%	611,587,571
iShares Core S&P 500 ETF	1,876,681	Institution	1.28%	335,850,832
SPDR S&P 500 ETF Trust CDI	1,760,185	Institution	1.20%	310,109,393
SPDR S&P 500 ETF Trust	1,737,445	Institution	1.18%	306,424,487
Vanguard Value ETF	1,365,728	Institution	0.93%	261,973,945
iShares Biotechnology ETF	1,095,582	Institution	0.75%	196,065,355
Health Care Select Sector SPDR Fund	1,064,348	Institution	0.73%	187,713,735
Vanguard Mid-Cap Value ETF	915,631	Institution	0.62%	175,636,338

FAQ

Who Owns Biogen (BIIB)?

According to the latest TipRanks data, approximately 0.64% of the company's stock is held by institutional investors, 0.19% is held by insiders, and 36.10% is held by retail investors.

What percentage of Biogen (BIIB) stock is held by institutional investors?

According to the latest TipRanks data, approximately 0.64% of Biogen (BIIB) stock is held by institutional investors.

What percentage of Biogen (BIIB) stock is held by retail investors?

According to the latest TipRanks data, approximately 36.10% of Biogen (BIIB) stock is held by retail investors.

Who owns the most shares of Biogen (BIIB)?

Vanguard owns the most shares of Biogen (BIIB).

What is the significance of the ownership structure for a publicly traded company?

The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.