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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, Q3 2025

Institutional positions in Biogen Inc. as of Sep 30, 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
909
+52 vs. Q2 2025
Shares held
131.3M
+3.52M (+2.8%) vs. Q2 2025
Total value
$18.4B
+$2.32B (+14.5%) vs. Q2 2025
New holders
125
323 more added
Sold out
73
268 more reduced

10 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 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 holdersQ3 2025: 909 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 heldQ3 2025: $18.4B
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, Q3 2025

Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q2 2025.

Institutions holding BIIB in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Rakuten Securities, Inc.49$6.86K0.00%−130−72.6%Reduced
Clear Street Markets LLC49$6.86K0.00%+49New
Tradewinds Capital Management, LLC50$7.00K0.00%00.0%Unchanged
Financial Freedom, LLC50$7.00K0.00%00.0%Unchanged
Millstone Evans Group, LLC50$7.00K0.00%00.0%Unchanged
Heartwood Wealth Advisors LLC50$7.00K0.00%+50New
Grove Bank & Trust51$7.14K0.00%00.0%Unchanged
Meeder Asset Management Inc51$7.14K0.00%+1+2.0%Added
CBIZ Investment Advisory Services, LLC51$7.14K0.00%+28+121.7%Added
UMA Financial Services, Inc.53$7.42K0.00%+11+26.2%Added
Private Wealth Management Group, LLC54$7.57K0.00%+7+14.9%Added
Tortoise Investment Management, LLC56$7.84K0.00%+7+14.3%Added
Asset Dedication, LLC57$7.99K0.00%−17−23.0%Reduced
Saranac Partners Ltd57$7.99K0.00%+57New
Hemington Wealth Management59$8.00K0.00%+14+31.1%Added
Montag A & Associates Inc60$8.40K0.00%00.0%Unchanged
Harbor Investment Advisory, LLC62$8.69K0.00%−12−16.2%Reduced
Root Financial Partners, LLC62$8.69K0.00%+62New
Private Wealth Asset Management, LLC63$8.82K0.00%00.0%Unchanged
Prestige Wealth Management Group LLC64$8.97K0.00%+26+68.4%Added
First Community Trust NA65$9.11K0.01%00.0%Unchanged
Future Financial Wealth Managment LLC65$9.11K0.01%00.0%Unchanged
Salomon & Ludwin, LLC57$9.11K0.00%+57New
Catalyst Capital Advisors LLC69$9.67K0.00%−20−22.5%Reduced
Smallwood Wealth Investment Management, LLC70$9.80K0.01%00.0%Unchanged
Sachetta, LLC70$9.81K0.00%00.0%Unchanged
Avion Wealth73$10.0K0.00%−1−1.4%Reduced
Medallion Wealth Advisors, LLC73$10.2K0.00%−42−36.5%Reduced
Independence Bank of Kentucky75$10.5K0.00%00.0%Unchanged
Cetera Trust Company, N.A75$10.5K0.01%00.0%Unchanged
Mountain Hill Investment Partners Corp.75$10.5K0.01%00.0%Unchanged
Stephenson National Bank & Trust79$11.1K0.00%+4+5.3%Added
Steigerwald, Gordon & Koch Inc.79$11.1K0.00%+79New
Adirondack Trust Co80$11.2K0.00%00.0%Unchanged
Union Bancaire Privee, UBP SA82$11.3K0.00%00.0%Unchanged
Quent Capital, LLC82$11.5K0.00%+82New
Asset Planning,Inc84$11.8K0.01%−42−33.3%Reduced
Hara Capital LLC84$11.8K0.01%00.0%Unchanged
RMG Wealth Management LLC80$11.9K0.00%00.0%Unchanged
Brown Shipley& Co Ltd85$11.9K0.01%00.0%Unchanged
Centerpoint Advisors, LLC83$12.0K0.00%00.0%Unchanged
Clayton Financial Group LLC87$12.2K0.01%+87New
Red Tortoise LLC89$12.5K0.01%00.0%Unchanged
Ransom Advisory, Ltd90$12.6K0.01%00.0%Unchanged
VSM Wealth Advisory, LLC92$12.9K0.00%00.0%Unchanged
E Fund Management (Hong Kong) Co., Ltd.99$13.9K0.01%+59+147.5%Added
High Note Wealth, LLC99$13.9K0.00%+64+182.9%Added
Delta Asset Management LLC100$14.0K0.00%00.0%Unchanged
Strengthening Families & Communities, LLC100$14.0K0.00%00.0%Unchanged
Broadwater Capital Management LLC100$14.0K0.01%−12,459−99.2%Reduced
Global Trust Asset Management, LLC100$14.0K0.01%+100New
NBC Securities, Inc.103$14.4K0.00%−51−33.1%Reduced
Strategic Wealth Partners, Ltd.105$14.7K0.00%−175−62.5%Reduced
Graney & King, LLC106$14.8K0.01%00.0%Unchanged
CKW Financial Group100$15.0K0.00%00.0%Unchanged
Cary Street Partner Investment Advisory LLC109$15.3K0.01%+109New
Sittner & Nelson, LLC110$15.4K0.01%00.0%Unchanged
Bruce G. Allen Investments, LLC110$15.4K0.01%+5+4.8%Added
Concord Wealth Partners114$16.0K0.00%−114−50.0%Reduced
Atlantic Union Bankshares Corp115$16.1K0.00%00.0%Unchanged
North Capital, Inc.117$16.4K0.01%+1+0.9%Added
Johnson Financial Group, Inc.119$16.7K0.00%+80+205.1%Added
AllSquare Wealth Management LLC153$21.4K0.01%00.0%Unchanged
Private Trust Co NA155$21.7K0.00%−11−6.6%Reduced
Towarzystwo Funduszy Inwestycyjnych Pzu SA160$22.4K0.01%−450−73.8%Reduced
Global Retirement Partners, LLC162$22.7K0.00%+60+58.8%Added
Trust Co163$22.8K0.00%00.0%Unchanged
Central Trust Co163$22.8K0.00%00.0%Unchanged
Spire Wealth Management166$23.3K0.00%+18+12.2%Added
Rise Advisors, LLC166$23.3K0.01%+18+12.2%Added
Addison Advisors LLC167$23.4K0.01%+41+32.5%Added
Ogorek Anthony Joseph172$24.0K0.01%00.0%Unchanged
Bell Investment Advisors, Inc172$24.1K0.00%+70+68.6%Added
Principia Wealth Advisory, LLC185$25.9K0.02%+2+1.1%Added
MV Capital Management, Inc.194$27.2K0.00%+14+7.8%Added
CoreCap Advisors, LLC199$27.9K0.00%−150−43.0%Reduced
Vision Financial Markets LLC200$28.0K0.02%00.0%Unchanged
WealthCollab, LLC206$28.9K0.01%+35+20.5%Added
Harbour Investments, Inc.207$29.0K0.00%+6+3.0%Added
Capital Advisors, Ltd. LLC232$32.0K0.00%+52+28.9%Added
True Wealth Design, LLC233$32.6K0.01%+90+62.9%Added
NBT Bank N A234$32.8K0.00%−50−17.6%Reduced
GW&K Investment Management, LLC239$33.0K0.00%−21−8.1%Reduced
Twin Lakes Capital Management, LLC250$35.0K0.02%00.0%Unchanged
WFA of San Diego, LLC253$35.4K0.02%00.0%Unchanged
Quintet Private Bank (Europe) S.A.255$35.7K0.00%00.0%Unchanged
Golden State Wealth Management, LLC265$37.1K0.00%00.0%Unchanged
Itau Unibanco Holding S.A.271$38.0K0.00%−2−0.7%Reduced
Costello Asset Management, INC300$42.0K0.01%00.0%Unchanged
Newbridge Financial Services Group, Inc.300$42.0K0.01%00.0%Unchanged
Hopwood Financial Services, Inc.300$42.0K0.03%00.0%Unchanged
Bogart Wealth, LLC313$43.8K0.00%+104+49.8%Added
MCF Advisors LLC324$45.4K0.00%00.0%Unchanged
Sentry Investment Management LLC305$46.0K0.03%+305New
Optimum Investment Advisors335$46.9K0.02%00.0%Unchanged
FSA Wealth Management LLC344$48.2K0.02%00.0%Unchanged
ORG Wealth Partners, LLC349$48.9K0.01%+349New
Ameritas Advisory Services, LLC353$49.4K0.00%−256−42.0%Reduced
Armstrong Advisory Group, Inc356$49.9K0.00%00.0%Unchanged
Aventura Private Wealth, LLC367$51.4K0.02%−35−8.7%Reduced