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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; 1,046 institutions reported holding it in 13F filings for Q2 2026, worth $30.7B in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Biogen Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of BIIB: Q3 2025 compared with Q4 2025
MeasureQ3 2025Of which not filed for Q4 2025Q4 2025Change
Holders908161,001+109
Shares131.3M300.5K139.7M+8.71M (+6.6%)
Value$18.4B$42.1M$24.6B+$6.26B (+34.1%)

16 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (191)

Institutions that held Biogen Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Showing the largest 100 of 191 by value.

Institutions new to BIIB in Q4 2025
InstitutionSharesValue% of portfolio
Norges Bank2,638,834$464.4M0.05%
Boston Partners1,720,595$302.8M0.31%
Jain Global LLC353,173$62.2M0.61%
Glenview Capital Management, LLC290,605$51.1M1.09%
Artemis Investment Management LLP226,845$39.9M0.48%
Defilade Capital Management, L.P.161,992$28.5M3.86%
Y-Intercept (Hong Kong) Ltd134,566$23.7M0.53%
Eurizon Capital SGR S.p.A.130,813$23.0M0.07%
Perceptive Advisors LLC124,000$21.8M0.40%
Braidwell LP115,700$20.4M0.65%
Susquehanna Portfolio Strategies, LLC106,114$18.7M0.29%
Integral Health Asset Management, LLC100,000$17.6M0.89%
Walleye Trading LLC95,522$16.8M0.27%
Portolan Capital Management, LLC84,990$15.0M0.80%
Contrarius Group Holdings Ltd64,952$11.4M0.55%
Weiss Asset Management LP55,560$9.78M0.14%
Nomura Asset Management International Inc.46,340$8.15M0.01%
Adams Diversified Equity Fund, Inc.44,300$7.80M0.26%
Bridger Management, LLC36,065$6.35M4.08%
Insight Wealth Strategies, LLC28,960$5.10M0.58%
Nippon Life Global Investors Americas, Inc.26,490$4.66M0.19%
Mubadala Investment Co PJSC26,236$4.62M0.03%
NLB Skladi, upravljanje premozenja, d.o.o.22,007$3.87M0.18%
CIBC World Markets Corp20,403$3.59M0.02%
Sivik Global Healthcare LLC20,000$3.52M1.72%
IMC-Chicago, LLC19,011$3.35M0.06%
Fideuram - Intesa Sanpaolo Private Banking S.P.A.18,873$3.32M0.12%
MH & Associates Securities Management Corp17,598$3.10M2.53%
Element Squared LLC15,051$2.65M1.44%
Fieldview Capital Management, LLC14,272$2.51M0.43%
Camarda Financial Advisors, LLC13,257$2.33M0.89%
Maven Securities LTD13,069$2.30M0.29%
Twin Tree Management, LP12,270$2.16M0.22%
Catalyst Funds Management Pty Ltd11,400$2.01M0.47%
Summit Financial, LLC11,139$1.96M0.03%
Pinnacle Financial Partners, Inc.10,909$1.92M0.01%
Aster Capital Management (DIFC) Ltd10,487$1.85M0.81%
Winton Group Ltd10,145$1.79M0.06%
Glenmede Trust Co NA9,919$1.75M0.01%
PensionDanmark Pensionsforsikringsaktieselskab9,162$1.61M0.01%
Abacus Wealth Partners, LLC8,768$1.54M0.15%
LMR Partners LLP8,630$1.52M0.01%
AG2R la Mondiale Gestion D'Actifs8,264$1.45M0.06%
North Dakota State Investment Board7,575$1.33M0.05%
Stableford Capital II LLC6,914$1.22M0.44%
VestGen Advisors, LLC6,884$1.21M0.05%
Laird Norton Trust Company, LLC6,820$1.20M0.02%
Paragon Capital Management Inc6,686$1.18M0.91%
Bank of Hawaii6,667$1.17M0.06%
Osmosis Investment Management UK Ltd6,635$1.17M0.03%
Sagewood Asset Management LP5,899$1.04M0.37%
Two Sigma Securities, LLC5,430$955.6K0.13%
Wealthcare Advisory Partners LLC5,302$933.1K0.02%
Sigma Planning Corp5,246$923.2K0.03%
Elevated Private Wealth, LLC5,163$908.6K0.95%
Laurion Capital Management LP5,033$885.8K0.06%
Abn Amro Investment Solutions4,826$849.3K0.01%
Jones Kertz & Associates, Inc.4,491$790.4K0.41%
V-Square Quantitative Management LLC4,120$725.1K0.08%
Econ Financial Services Corp3,946$694.5K0.35%
Burns Matteson Capital Management, LLC3,919$689.7K0.28%
AlphaCentric Advisors LLC3,627$638.3K0.64%
Chesapeake Capital Corp3,544$623.7K0.52%
Pavaki Capital Management LLC3,500$616.0K0.43%
Atomi Financial Group, Inc.3,278$576.8K0.02%
IKE Capital, LLC3,194$562.1K0.49%
Evolve Private Wealth, LLC3,183$560.2K0.03%
Phoenix Holdings Ltd.3,133$551.1K0.01%
Oppenheimer Asset Management Inc.3,012$530.1K0.01%
Aquatic Capital Management LLC2,909$512.0K0.01%
Persistent Asset Partners Ltd2,874$505.8K0.24%
Arrowpoint Investment Partners (Singapore) Pte. Ltd.2,855$502.5K0.07%
Atlas Capital Advisors LLC2,844$500.5K0.06%
Twinbeech Capital LP2,834$498.8K0.04%
Warren Averett Asset Management, LLC2,793$491.5K0.00%
EFG International AG2,635$463.7K0.01%
Quadrature Capital Ltd2,611$459.5K0.00%
Pitcairn Wealth Advisors LLC2,565$451.4K0.04%
Xxi Wealth, LLC2,515$442.6K0.27%
Andra AP-fonden2,500$440.0K0.01%
IHT Wealth Management, LLC2,473$435.3K0.01%
NewEdge Wealth, LLC2,470$434.7K0.00%
F/M Investments LLC2,465$433.8K0.02%
XTX Topco Ltd2,459$432.8K0.01%
McAdam, LLC2,410$424.1K0.02%
Axxcess Wealth Management, LLC2,281$401.4K0.01%
Colonial River Wealth Management, LLC2,273$400.0K0.14%
Beese Fulmer Investment Management, Inc.2,272$399.9K0.03%
We Are One Seven, LLC2,251$396.2K0.01%
Prospera Financial Services Inc2,240$394.2K0.01%
Parallax Volatility Advisers, L.P.2,237$393.7K0.01%
TCW Group Inc2,226$391.8K0.00%
Frec Markets, Inc.2,154$379.2K0.11%
Ausdal Financial Partners, Inc.2,088$367.5K0.02%
Aprio Wealth Management, LLC1,950$343.2K0.02%
DRW Securities, LLC1,955$337.8K0.03%
EP Wealth Advisors, LLC1,800$316.8K0.00%
Everhart Financial Group, Inc.1,657$291.6K0.03%
Envestnet Portfolio Solutions, Inc.1,652$290.7K0.00%
Florida Financial Advisors, LLC1,624$285.8K0.08%

Sold out (82)

Institutions that held Biogen Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of BIIB in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Vestal Point Capital, LP275,000$38.5M
Wedge Capital Management L L P192,872$27.0M
Qube Research & Technologies Ltd121,607$17.0M
Connor, Clark & Lunn Investment Management Ltd.116,928$16.4M
Capital Fund Management S.A.47,727$6.69M
Bridgewater Associates, LP39,983$5.60M
Vinva Investment Management Ltd38,704$5.36M
ExodusPoint Capital Management, LP31,931$4.47M
Group One Trading, L.P.19,310$2.70M
SummitTX Capital, L.P.17,379$2.43M
Lombard Odier Asset Management (Switzerland) SA17,264$2.42M
ISAM Funds (UK) Ltd17,191$2.41M
iA Global Asset Management Inc.16,978$2.38M
Oppenheimer & Co Inc13,610$1.91M
Pitcairn Co10,192$1.43M
Shelton Capital Management9,444$1.32M
Shay Capital LLC9,000$1.26M
Harvest Fund Management Co., Ltd8,998$1.26M
Fox Run Management, L.L.C.6,969$976.2K
Twin Capital Management Inc6,788$950.9K
Brighton Jones LLC6,514$912.4K
Koss-Olinger Consulting, LLC7,256$911.0K
Money Concepts Capital Corp6,058$848.6K
Holocene Advisors, LP5,979$837.5K
Boothbay Fund Management, LLC5,500$770.4K
NJ State Employees Deferred Compensation Plan5,180$725.6K
Bayesian Capital Management, LP5,100$714.4K
Crowley Wealth Management, Inc.4,810$673.8K
Stevens Capital Management LP3,967$556.0K
Summit Wealth Group LLC2,146$551.5K
EntryPoint Capital, LLC3,319$464.9K
APG Asset Management US Inc.3,010$464.2K
MQS Management LLC3,206$449.1K
J. L. Bainbridge & Co., Inc.2,969$415.9K
Humankind Investments LLC2,867$401.6K
Advanced Portfolio Management, LLC2,641$365.8K
Requisite Capital Management, LLC2,585$362.1K
Marex Group plc2,525$353.7K
Voleon Capital Management LP2,253$315.6K
Philadelphia Trust Co2,250$315.0K
111 Capital2,130$298.4K
Petros Family Wealth, LLC2,109$295.4K
Campbell & CO Investment Adviser LLC2,094$293.3K
Wedbush Securities Inc2,017$283.0K
Catalytic Wealth RIA, LLC2,000$280.2K
J.W. Cole Advisors, Inc.1,991$278.9K
Bridgefront Capital, LLC1,962$274.8K
Traub Capital Management LLC1,910$267.6K
Claro Advisors LLC1,857$260.1K
Fidelis Capital Partners, LLC1,703$238.6K
Sym Financial Corp1,695$237.4K
Mason & Associates Inc1,563$218.9K
Israel Discount Bank of New York1,453$203.5K
S-Bank Fund Management Ltd1,292$181.0K
Principal Securities, Inc.711$99.6K
Mma Asset Management LLC600$84.0K
Salem Investment Counselors Inc566$79.3K
Alpine Bank Wealth Management545$76.3K
Caitong International Asset Management Co., Ltd382$53.5K
Ameritas Advisory Services, LLC353$49.4K
Hopwood Financial Services, Inc.300$42.0K
Rise Advisors, LLC166$23.3K
North Capital, Inc.117$16.4K
Global Trust Asset Management, LLC100$14.0K
Union Bancaire Privee, UBP SA82$11.3K
Mountain Hill Investment Partners Corp.75$10.5K
Future Financial Wealth Managment LLC65$9.11K
Montag A & Associates Inc60$8.40K
Saranac Partners Ltd57$7.99K
Tortoise Investment Management, LLC56$7.84K
Heartwood Wealth Advisors LLC50$7.00K
Marshall & Sterling Wealth Advisors Inc.49$6.86K
Winch Advisory Services, LLC16$2.24K
Avalon Trust Co9$1.26K
Activest Wealth Management9$1.26K
Hazlett, Burt & Watson, Inc.10$1.00K
FNY Investment Advisers, LLC13$1.00K
Cloud Capital Management, LLC11$1.00K
Hurley Capital, LLC2$280
Palisade Asset Management, LLC1$141
Koesten, Hirschmann & Crabtree, INC.0$41
Y.D. More Investments Ltd39$16

Not filed for Q4 2025 yet (16)

Institutions that held Biogen Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding BIIB in Q3 2025 that haven't filed for Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
AXA Investment Managers S.A.118,311$16.6M
Point72 Europe (London) LLP99,013$13.9M
Glenmede Investment Management, LP25,891$3.63M
CIBC Bancorp USA Inc.25,593$3.59M
Synovus Financial Corp15,595$2.18M
Shell Asset Management Co5,448$763.0K
Wetherby Asset Management Inc3,832$536.8K
Court Place Advisors, LLC3,660$512.7K
Cubist Systematic Strategies, LLC1,300$182.1K
Point72 (DIFC) Ltd772$108.1K
FSA Wealth Management LLC344$48.2K
Optimum Investment Advisors335$46.9K
AllSquare Wealth Management LLC153$21.4K
Hemington Wealth Management59$8.00K
West Oak Capital, LLC25$3.50K
Accredited Wealth Management, LLC200$2.10K