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Biogen Inc.

BIIB
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0000875045

In the last 90 days, Biogen Inc. insiders filed 0 open-market purchases and 1 sale; 1,047 institutions reported holding it in 13F filings for Q2 2026, worth $30.7B in total; no superinvestor holds it.

13F holders, Q4 2025

Institutional positions in Biogen Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
1,002
+109 vs. Q3 2025
Shares held
139.7M
+8.71M (+6.6%) vs. Q3 2025
Total value
$24.6B
+$6.26B (+34.1%) vs. Q3 2025
New holders
191
323 more added
Sold out
82
295 more reduced

16 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting BIIB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2025: 1,002 institutions
Q1 2021: 1,096 institutionsQ2 2021: 1,107 institutionsQ3 2021: 1,044 institutionsQ4 2021: 1,014 institutionsQ1 2022: 954 institutionsQ2 2022: 930 institutionsQ3 2022: 987 institutionsQ4 2022: 1,033 institutionsQ1 2023: 1,004 institutionsQ2 2023: 1,009 institutionsQ3 2023: 966 institutionsQ4 2023: 1,005 institutionsQ1 2024: 955 institutionsQ2 2024: 947 institutionsQ3 2024: 921 institutionsQ4 2024: 879 institutionsQ1 2025: 882 institutionsQ2 2025: 867 institutionsQ3 2025: 909 institutionsQ4 2025: 1,002 institutionsQ1 2026: 1,015 institutionsQ2 2026: 1,047 institutions
Value heldQ4 2025: $24.6B
Q1 2021: $35.7BQ2 2021: $43.6BQ3 2021: $35.1BQ4 2021: $29.7BQ1 2022: $25.9BQ2 2022: $25.0BQ3 2022: $33.0BQ4 2022: $34.6BQ1 2023: $35.0BQ2 2023: $36.1BQ3 2023: $32.2BQ4 2023: $33.3BQ1 2024: $28.0BQ2 2024: $29.9BQ3 2024: $25.1BQ4 2024: $20.2BQ1 2025: $17.7BQ2 2025: $16.3BQ3 2025: $18.4BQ4 2025: $24.6BQ1 2026: $24.7BQ2 2026: $30.7B
Institutions holding BIIB and their total value by quarter
QuarterHoldersValue
Q2 20261,047$30.7B
Q1 20261,015$24.7B
Q4 20251,002$24.6B
Q3 2025909$18.4B
Q2 2025867$16.3B
Q1 2025882$17.7B
Q4 2024879$20.2B
Q3 2024921$25.1B
Q2 2024947$29.9B
Q1 2024955$28.0B
Q4 20231,005$33.3B
Q3 2023966$32.2B
Q2 20231,009$36.1B
Q1 20231,004$35.0B
Q4 20221,033$34.6B
Q3 2022987$33.0B
Q2 2022930$25.0B
Q1 2022954$25.9B
Q4 20211,014$29.7B
Q3 20211,044$35.1B
Q2 20211,107$43.6B
Q1 20211,096$35.7B

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q3 2025.

Institutions holding BIIB in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Kayne Anderson Rudnick Investment Management LLC0$1720.00%0New
Quest 10 Wealth Builders, Inc.1$1370.00%00.0%Unchanged
Harvest Fund Management Co., Ltd0$00.00%−8,998−100.0%Sold out
Vestal Point Capital, LP0$00.00%−275,000−100.0%Sold out
Wedge Capital Management L L P0$00.00%−192,872−100.0%Sold out
Qube Research & Technologies Ltd0$00.00%−121,607−100.0%Sold out
Connor, Clark & Lunn Investment Management Ltd.0$00.00%−116,928−100.0%Sold out
Capital Fund Management S.A.0$00.00%−47,727−100.0%Sold out
Bridgewater Associates, LP0$00.00%−39,983−100.0%Sold out
Vinva Investment Management Ltd0$00.00%−38,704−100.0%Sold out
ExodusPoint Capital Management, LP0$00.00%−31,931−100.0%Sold out
Group One Trading, L.P.0$00.00%−19,310−100.0%Sold out
SummitTX Capital, L.P.0$00.00%−17,379−100.0%Sold out
Lombard Odier Asset Management (Switzerland) SA0$00.00%−17,264−100.0%Sold out
ISAM Funds (UK) Ltd0$00.00%−17,191−100.0%Sold out
iA Global Asset Management Inc.0$00.00%−16,978−100.0%Sold out
Oppenheimer & Co Inc0$00.00%−13,610−100.0%Sold out
Pitcairn Co0$00.00%−10,192−100.0%Sold out
Shelton Capital Management0$00.00%−9,444−100.0%Sold out
Shay Capital LLC0$00.00%−9,000−100.0%Sold out
Fox Run Management, L.L.C.0$00.00%−6,969−100.0%Sold out
Twin Capital Management Inc0$00.00%−6,788−100.0%Sold out
Brighton Jones LLC0$00.00%−6,514−100.0%Sold out
Koss-Olinger Consulting, LLC0$00.00%−7,256−100.0%Sold out
Money Concepts Capital Corp0$00.00%−6,058−100.0%Sold out
Holocene Advisors, LP0$00.00%−5,979−100.0%Sold out
Boothbay Fund Management, LLC0$00.00%−5,500−100.0%Sold out
NJ State Employees Deferred Compensation Plan0$00.00%−5,180−100.0%Sold out
Bayesian Capital Management, LP0$00.00%−5,100−100.0%Sold out
Crowley Wealth Management, Inc.0$00.00%−4,810−100.0%Sold out
Stevens Capital Management LP0$00.00%−3,967−100.0%Sold out
Summit Wealth Group LLC0$00.00%−2,146−100.0%Sold out
EntryPoint Capital, LLC0$00.00%−3,319−100.0%Sold out
APG Asset Management US Inc.0$00.00%−3,010−100.0%Sold out
MQS Management LLC0$00.00%−3,206−100.0%Sold out
J. L. Bainbridge & Co., Inc.0$00.00%−2,969−100.0%Sold out
Humankind Investments LLC0$00.00%−2,867−100.0%Sold out
Advanced Portfolio Management, LLC0$00.00%−2,641−100.0%Sold out
Requisite Capital Management, LLC0$00.00%−2,585−100.0%Sold out
Marex Group plc0$00.00%−2,525−100.0%Sold out
Voleon Capital Management LP0$00.00%−2,253−100.0%Sold out
Philadelphia Trust Co0$00.00%−2,250−100.0%Sold out
111 Capital0$00.00%−2,130−100.0%Sold out
Petros Family Wealth, LLC0$00.00%−2,109−100.0%Sold out
Campbell & CO Investment Adviser LLC0$00.00%−2,094−100.0%Sold out
Wedbush Securities Inc0$00.00%−2,017−100.0%Sold out
Catalytic Wealth RIA, LLC0$00.00%−2,000−100.0%Sold out
J.W. Cole Advisors, Inc.0$00.00%−1,991−100.0%Sold out
Bridgefront Capital, LLC0$00.00%−1,962−100.0%Sold out
Traub Capital Management LLC0$00.00%−1,910−100.0%Sold out
Claro Advisors LLC0$00.00%−1,857−100.0%Sold out
Fidelis Capital Partners, LLC0$00.00%−1,703−100.0%Sold out
Sym Financial Corp0$00.00%−1,695−100.0%Sold out
Mason & Associates Inc0$00.00%−1,563−100.0%Sold out
Israel Discount Bank of New York0$00.00%−1,453−100.0%Sold out
S-Bank Fund Management Ltd0$00.00%−1,292−100.0%Sold out
Principal Securities, Inc.0$00.00%−711−100.0%Sold out
Mma Asset Management LLC0$00.00%−600−100.0%Sold out
Salem Investment Counselors Inc0$00.00%−566−100.0%Sold out
Alpine Bank Wealth Management0$00.00%−545−100.0%Sold out
Caitong International Asset Management Co., Ltd0$00.00%−382−100.0%Sold out
Ameritas Advisory Services, LLC0$00.00%−353−100.0%Sold out
Hopwood Financial Services, Inc.0$00.00%−300−100.0%Sold out
Rise Advisors, LLC0$00.00%−166−100.0%Sold out
North Capital, Inc.0$00.00%−117−100.0%Sold out
Global Trust Asset Management, LLC0$00.00%−100−100.0%Sold out
Union Bancaire Privee, UBP SA0$00.00%−82−100.0%Sold out
Mountain Hill Investment Partners Corp.0$00.00%−75−100.0%Sold out
Future Financial Wealth Managment LLC0$00.00%−65−100.0%Sold out
Montag A & Associates Inc0$00.00%−60−100.0%Sold out
Saranac Partners Ltd0$00.00%−57−100.0%Sold out
Tortoise Investment Management, LLC0$00.00%−56−100.0%Sold out
Heartwood Wealth Advisors LLC0$00.00%−50−100.0%Sold out
Marshall & Sterling Wealth Advisors Inc.0$00.00%−49−100.0%Sold out
Winch Advisory Services, LLC0$00.00%−16−100.0%Sold out
Avalon Trust Co0$00.00%−9−100.0%Sold out
Activest Wealth Management0$00.00%−9−100.0%Sold out
Hazlett, Burt & Watson, Inc.0$00.00%−10−100.0%Sold out
FNY Investment Advisers, LLC0$00.00%−13−100.0%Sold out
Cloud Capital Management, LLC0$00.00%−11−100.0%Sold out
Hurley Capital, LLC0$00.00%−2−100.0%Sold out
Palisade Asset Management, LLC0$00.00%−1−100.0%Sold out
Koesten, Hirschmann & Crabtree, INC.0$00.00%0Sold out
Y.D. More Investments Ltd0$00.00%−39−100.0%Sold out
AXA Investment Managers S.A.––––Not filed
Point72 Europe (London) LLP––––Not filed
Glenmede Investment Management, LP––––Not filed
CIBC Bancorp USA Inc.––––Not filed
Synovus Financial Corp––––Not filed
Shell Asset Management Co––––Not filed
Wetherby Asset Management Inc––––Not filed
Court Place Advisors, LLC––––Not filed
Cubist Systematic Strategies, LLC––––Not filed
Point72 (DIFC) Ltd––––Not filed
FSA Wealth Management LLC––––Not filed
Optimum Investment Advisors––––Not filed
AllSquare Wealth Management LLC––––Not filed
Hemington Wealth Management––––Not filed
West Oak Capital, LLC––––Not filed
Accredited Wealth Management, LLC––––Not filed