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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.

Q1 2026 vs. Q4 2025

How the institutions holding Biogen Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of BIIB: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders1,001201,014+33
Shares139.7M20.2M135.0M+15.4M (+12.9%)
Value$24.6B$3.55B$24.7B+$3.70B (+17.6%)

20 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (138)

Institutions that held Biogen Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Showing the largest 100 of 138 by value.

Institutions new to BIIB in Q1 2026
InstitutionSharesValue% of portfolio
Vanguard Capital Management LLC9,537,417$1.75B0.04%
Vanguard Portfolio Management LLC6,531,727$1.20B0.06%
Vanguard Fiduciary Trust Co825,531$151.3M0.04%
Vanguard Global Advisers, LLC343,768$63.0M0.03%
Vanguard Asset Management, Ltd249,778$45.8M0.04%
Sofinnova Investments, Inc.229,521$42.1M2.11%
Qube Research & Technologies Ltd212,921$39.0M0.06%
ExodusPoint Capital Management, LP151,993$27.9M0.28%
Vanguard Investments Australia, Ltd.73,268$13.4M0.04%
OrbiMed Advisors LLC61,600$11.3M0.26%
Tredje AP-fonden46,370$8.50M0.05%
Contravisory Investment Management, Inc.44,677$8.19M1.68%
CIBC Bancorp USA Inc.41,902$7.68M0.01%
SEB Asset Management AB41,869$7.68M0.03%
Martingale Asset Management L P36,735$6.73M0.17%
PEAK6 LLC28,166$5.16M0.15%
Munich Reinsurance Co Stock Corp in Munich23,942$4.39M0.11%
SummitTX Capital, L.P.21,656$3.97M0.13%
Canal Insurance CO20,000$3.67M0.79%
Artia Global Partners LP18,437$3.38M0.76%
Dark Forest Capital Management LP15,736$2.88M0.26%
Dymon Asia Capital (Singapore) Pte. Ltd.15,000$2.75M0.60%
Boothbay Fund Management, LLC14,268$2.62M0.06%
Graham Capital Management, L.P.10,342$1.90M0.06%
GFS Advisors, LLC23,915$1.86M0.13%
Farringdon Capital, Ltd.9,054$1.66M0.36%
Brighton Jones LLC8,051$1.48M0.03%
Jupiter Asset Management Ltd7,141$1.31M0.01%
Hussman Strategic Advisors, Inc.6,300$1.15M0.25%
Scotia Capital Inc.6,274$1.15M0.00%
Mediolanum International Funds Ltd6,054$1.14M0.01%
Bridgefront Capital, LLC6,010$1.10M0.27%
Friedenthal Financial5,930$1.09M0.55%
Jackson Creek Investment Advisors LLC5,662$1.04M0.31%
Saudi Central Bank5,415$992.7K0.02%
E Fund Management Co., Ltd.5,209$955.0K0.03%
Taproot Management LP5,133$941.0K0.18%
Bull Harbor Capital LLC5,077$930.8K0.25%
Birchview Capital, LP5,000$916.6K0.52%
Holocene Advisors, LP4,793$878.7K0.00%
Gilder Gagnon Howe & Co LLC4,558$835.6K0.01%
Twin Capital Management Inc4,430$812.2K0.10%
La Banque Postale Asset Management SA4,367$800.6K0.01%
Lombard Odier Asset Management (Switzerland) SA3,899$714.8K0.03%
Mount Yale Investment Advisors, LLC3,724$682.7K0.02%
Providence First Trust Co3,079$564.5K0.20%
ISAM Funds (UK) Ltd2,916$534.6K0.26%
Legacy Capital Group California, Inc.2,901$531.8K0.20%
Tiaa-Cref Individual & Institutional Services, LLC2,817$516.4K0.00%
Oppenheimer & Co Inc2,720$498.7K0.01%
Steel Peak Wealth Management LLC2,704$495.8K0.02%
DoubleLine ETF Adviser LP2,125$389.6K0.15%
Agp Franklin, LLC2,073$380.0K0.19%
Oslo Pensjonsforsikring AS1,840$337.3K0.05%
Brand Asset Management Group, Inc.1,814$332.6K0.09%
D'Orazio & Associates, Inc.1,777$325.8K0.04%
Stevens Capital Management LP1,774$325.0K0.05%
LVW Advisors, LLC1,689$309.6K0.03%
TCG Advisory Services, LLC1,685$308.9K0.01%
PFG Investments, LLC1,568$287.5K0.01%
Engineers Gate Manager LP1,558$285.6K0.00%
SIH Partners, LLLP1,463$268.2K0.01%
Wellington-Altus USA Inc.1,219$263.4K0.16%
Principal Securities, Inc.1,420$260.3K0.00%
Vinva Investment Management Ltd1,360$255.1K0.00%
Financial Solutions Advisory Group, Inc.1,372$251.5K0.03%
Collaborative Fund Advisors, LLC1,327$243.3K0.15%
Financial Symmetry Inc1,248$236.1K0.08%
Clear Wave Wealth Management LLC1,280$234.7K0.06%
Diversified Trust Co1,266$232.1K0.00%
D.A. Davidson & Co.1,218$223.3K0.00%
Alphadyne Asset Management LP1,218$223.3K0.03%
Platform Technology Partners1,201$220.2K0.04%
Allegiance Financial Group Advisory Services LLC1,200$220.0K0.04%
Aaron Wealth Advisors1,185$217.2K0.01%
Rehmann Capital Advisory Group1,165$213.6K0.01%
Kingsview Wealth Management, LLC1,156$211.9K0.00%
Northwest Wealth Management, LLC1,152$211.2K0.03%
Tradewinds, LLC.1,129$211.2K0.07%
Sym Financial Corp1,150$210.8K0.02%
Poehling Capital Management, LLC1,144$209.7K0.04%
Sapient Capital LLC1,143$209.5K0.00%
Nwam LLC1,141$209.2K0.01%
Probity Advisors, Inc.1,131$207.3K0.03%
New Age Alpha Advisors, LLC1,119$205.1K0.01%
Bell Bank1,109$203.3K0.01%
Wedbush Securities Inc1,108$203.0K0.01%
Lighthouse Financial LLC1,101$201.8K0.12%
TRB Wealth Management, LLC1,097$201.1K0.03%
Quotient Wealth Partners, LLC1,097$201.1K0.01%
TIAA Wealth Investment Management LLC629$115.3K0.00%
ASR Vermogensbeheer N.V.600$110.0K0.00%
Salem Investment Counselors Inc566$103.8K0.00%
Encore Global Management, LP500$91.7K0.06%
Wealth Enhancement Trust Services, Inc.380$69.7K0.01%
Vanguard National Trust Co344$63.1K0.00%
TopTier Wealth Management, LLC336$61.6K0.04%
Opal Wealth Advisors, LLC256$46.9K0.01%
Wall Street Financial Group, Inc.224$41.1K0.02%
Cassaday & Co Wealth Management LLC218$40.0K0.00%

Sold out (105)

Institutions that held Biogen Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Showing the largest 100 of 105 by value.

Institutions that sold out of BIIB in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
HRT Financial LP384,265$67.6M
Jain Global LLC353,173$62.2M
Freestone Grove Partners LP187,608$33.0M
Y-Intercept (Hong Kong) Ltd134,566$23.7M
Suvretta Capital Management, LLC132,290$23.3M
Perceptive Advisors LLC124,000$21.8M
Braidwell LP115,700$20.4M
Eversept Partners, LP77,944$13.7M
Brevan Howard Capital Management LP71,017$12.5M
Contrarius Group Holdings Ltd64,952$11.4M
Weiss Asset Management LP55,560$9.78M
D. E. Shaw & Co., Inc.53,754$9.46M
Caption Management, LLC53,000$9.33M
Arrowstreet Capital, Limited Partnership45,349$7.98M
Bridger Management, LLC36,065$6.35M
Parkman Healthcare Partners LLC35,425$6.23M
AMF Pensionsforsakring AB33,479$5.89M
Skandinaviska Enskilda Banken AB (publ)28,748$5.06M
Mubadala Investment Co PJSC26,236$4.62M
Capula Management Ltd21,295$3.75M
Fluent Financial, LLC19,144$3.37M
IMC-Chicago, LLC19,011$3.35M
Verition Fund Management LLC18,523$3.26M
Hourglass Capital, LLC17,550$3.09M
Entropy Technologies, LP16,312$2.87M
Element Squared LLC15,051$2.65M
Camarda Financial Advisors, LLC13,257$2.33M
Maven Securities LTD13,069$2.30M
Provident Co of the Employees of the Hebrew University LTD12,529$2.20M
Janney Montgomery Scott LLC11,775$2.07M
Summit Financial, LLC11,139$1.96M
Jacobs Levy Equity Management, Inc9,873$1.74M
ICICI Prudential Asset Management Co Ltd9,462$1.67M
Two Sigma Advisers, LP8,800$1.55M
Linden Thomas Advisory Services, LLC7,264$1.28M
Paragon Capital Management Inc6,686$1.18M
Jump Financial, LLC5,779$1.02M
Laurion Capital Management LP5,033$885.8K
Polymer Capital Management (US) LLC5,022$883.8K
Lineweaver Wealth Advisors, LLC4,338$763.4K
Tiaa Trust, National Association3,186$560.7K
Alps Advisors Inc3,178$559.3K
Park Avenue Securities LLC3,030$533.0K
Aquatic Capital Management LLC2,909$512.0K
Quest Partners LLC2,799$492.6K
Quadrature Capital Ltd2,611$459.5K
IHT Wealth Management, LLC2,473$435.3K
NewEdge Wealth, LLC2,470$434.7K
Landscape Capital Management, L.L.C.2,459$432.8K
XTX Topco Ltd2,459$432.8K
Capstone Investment Advisors, LLC2,445$430.3K
McAdam, LLC2,410$424.1K
Supplemental Annuity Collective Trust of NJ2,300$404.8K
Harbor Capital Advisors, Inc.2,294$404.0K
Axxcess Wealth Management, LLC2,281$401.4K
Ausdal Financial Partners, Inc.2,088$367.5K
Sage Mountain Advisors LLC2,042$359.3K
HighPoint Advisor Group LLC1,980$348.5K
Flagship Harbor Advisors, LLC1,692$297.8K
Financiere des Professionnels - Fonds d,investissement inc.1,646$289.7K
Florida Financial Advisors, LLC1,624$285.8K
Great Valley Advisor Group, Inc.1,522$268.0K
Marathon Trading Investment Management LLC1,450$255.2K
ING Groep NV1,434$252.4K
IFG Advisory, LLC1,425$250.8K
LGT Fund Management Co Ltd.1,349$238.0K
Jackson Thornton Asset Management, LLC1,297$236.8K
Hansen & Associates Financial Group, Inc.1,226$231.7K
Keel Point, LLC1,292$227.4K
Valeo Financial Advisors, LLC1,197$210.7K
Howard Capital Management Inc.1,161$204.3K
Cladis Investment Advisory, LLC1,040$183.0K
Bayforest Capital Ltd887$156.1K
Jessup Wealth Management, Inc727$127.9K
TCTC Holdings, LLC600$105.6K
Armstrong Advisory Group, Inc356$62.7K
Elyxium Wealth, LLC330$58.1K
Sentry Investment Management LLC305$54.0K
Board of the Pension Protection Fund300$52.8K
Twin Lakes Capital Management, LLC250$44.0K
Reflection Asset Management141$24.8K
Concord Wealth Partners114$20.1K
Intesa Sanpaolo S.p.A.110$19.4K
Torren Management, LLC107$18.8K
Fideuram Asset Management (Ireland) dac126$18.8K
Kerr Financial Planning Corp100$18.5K
Strengthening Families & Communities, LLC100$17.6K
Catalyst Capital Advisors LLC88$15.5K
Quattro Advisors LLC52$9.15K
CBIZ Investment Advisory Services, LLC51$8.97K
Howard Hughes Medical Institute31$5.46K
Byrne Asset Management LLC30$5.28K
American Wealth Advisors, LLC29$5.10K
Tucker Asset Management LLC25$4.40K
Optima Capital LLC25$4.40K
Garner Asset Management Corp22$3.87K
Winnow Wealth LLC12$2.11K
Strategic Investment Solutions, Inc.10$1.76K
Mowery & Schoenfeld Wealth Management, LLC10$1.76K
IMG Wealth Management, Inc.9$1.58K

Not filed for Q1 2026 yet (20)

Institutions that held Biogen Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding BIIB in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc17,447,092$3.07B
Norges Bank2,638,834$464.4M
Forsta Ap-Fonden27,300$4.80M
CIBC World Markets Corp20,403$3.59M
Comerica Bank19,475$3.43M
Gifford Fong Associates5,750$1.01M
Elevated Private Wealth, LLC5,163$908.6K
David Loasby3,915$726.7K
Oracle Investment Management Inc2,412$424.5K
CIBC Private Wealth Group, LLC1,604$282.2K
SG Trading Solutions, LLC1,467$258.0K
FineMark National Bank & Trust1,463$257.5K
STF Management LP804$141.5K
Global Retirement Partners, LLC499$87.8K
Trust Co of Vermont389$68.5K
DV Equities, LLC205$36.1K
GPS Wealth Strategies Group, LLC110$19.4K
Ransom Advisory, Ltd90$15.8K
ORG Partners LLC58$10.2K
Motiv8 Investments LLC23$4.00K