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Biogen (1BIIB) Ownership - Who Owns Biogen?

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Biogen (1BIIB) Ownership Overview

  • 0.18% Insiders
  • 38.19% Mutual Funds
  • 5.56% Other Institutional Investors
  • 29.04% ETFs
  • 27.02% Public Companies and Individual Investors

The ownership structure of Biogen (IT:1BIIB) stock is a mix of institutional, retail, and individual investors. Approximately 72.80% of the company’s stock is owned by Institutional Investors, 0.18% is owned by Insiders, and 27.02% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Recent Insider Trading Activity
DateNameActivityValue
Aug 04, 2026Lloyd Minor$239,750
Feb 16, 2026Nicole Murphy$585
Feb 09, 2026Priya Singhal$531,548
Feb 02, 2026Priya Singhal$134,116

Recent Hedge Fund Trading Activity

Recent Hedge Fund Trading Activity
DateFirmActivityValue
Dec 31, 2025Goalvest Advisory Llc€34,846
Dec 31, 2025Auxier Asset Management€1,568,246
Dec 31, 2025Sivik Global Healthcare Llc€3,519,800
Dec 31, 2025Bridger Management, Llc€6,347,079

Top Shareholders

IT:1BIIB top shareholders
Holder# of SharesType% HoldingValue
BlackRock, Inc.15,985,736Institution10.81%4,025,783,811
Vanguard15,781,689Institution10.68%3,974,397,431
Theofanis Kolokotrones15,154,606Institution10.25%3,816,475,357
Vanguard Index Funds14,239,538Institution9.63%3,586,028,292
Ishares10,087,524Institution6.82%2,540,401,694
Vanguard Chester Funds8,359,880Institution5.66%2,105,318,740
Spdr6,755,314Institution4.57%1,701,231,257
Fidelity Contrafund6,193,978Institution4.19%1,559,866,644
Fidelity Concord Street Trust2,819,503Institution1.91%710,052,358
Vanguard Specialized Funds2,745,486Institution1.86%691,412,212

Top Mutual Fund Holders

IT:1BIIB top mutual fund holders
Holder# of SharesType% HoldingValue
Vanguard Index Funds14,239,538Institution9.63%3,586,028,292
Vanguard Chester Funds8,359,880Institution5.66%2,105,318,740
Fidelity Contrafund6,193,978Institution4.19%1,559,866,644
Fidelity Concord Street Trust2,819,503Institution1.91%710,052,358
Vanguard Specialized Funds2,745,486Institution1.86%691,412,212
Vanguard Horizon Funds2,624,317Institution1.78%660,897,496
Fidelity Rutland Square Trust Ii1,918,152Institution1.30%483,059,727
Primecap Odyssey Funds1,850,540Institution1.25%466,032,591
Fidelity Puritan Trust1,388,754Institution0.94%349,738,252
Vanguard Fenway Funds1,316,936Institution0.89%331,651,894

FAQ

Who Owns Biogen (IT:1BIIB)?
According to the latest TipRanks data, approximately 72.80% of the company's stock is held by institutional investors, 0.18% is held by insiders, and 27.02% is held by public companies and individual investors.
What percentage of Biogen (IT:1BIIB) stock is held by institutional investors?
According to the latest TipRanks data, approximately 72.80% of Biogen (IT:1BIIB) stock is held by institutional investors: 38.19% by mutual funds, 29.04% by ETFs and 5.56% by other institutional investors.
What percentage of Biogen (IT:1BIIB) stock is held by retail investors?
According to the latest TipRanks data, approximately 27.02% of Biogen (IT:1BIIB) stock is held by public companies and individual investors.
Who owns the most shares of Biogen (IT:1BIIB)?
BlackRock, Inc. owns the most shares of Biogen (IT:1BIIB).
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.