Skip to main content
Livermore
Livermore
ZHEN

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.

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: 1,046 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 20261,046$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
Y.D. More Investments Ltd39$160.00%+39New
Koesten, Hirschmann & Crabtree, INC.0$410.00%0New
Cornerstone Planning Group LLC2$1040.00%−50−96.2%Reduced
Quest 10 Wealth Builders, Inc.1$1090.00%00.0%Unchanged
HFM Investment Advisors, LLC1$1400.00%−1−50.0%Reduced
Creative Financial Designs Inc1$1400.00%00.0%Unchanged
ROSS\JOHNSON & Associates LLC1$1400.00%00.0%Unchanged
Palisade Asset Management, LLC1$1410.00%+1New
DiNuzzo Private Wealth, Inc.2$2650.00%00.0%Unchanged
Ancora Advisors, LLC2$2800.00%00.0%Unchanged
Bay Harbor Wealth Management, LLC2$2800.00%+1+100.0%Added
Country Trust Bank2$2800.00%+2New
Hurley Capital, LLC2$2800.00%+2New
Davis Capital Management2$2800.00%+2New
Colonial Trust Co3$4200.00%00.0%Unchanged
Dunhill Financial, LLC3$4220.00%−1−25.0%Reduced
Winnow Wealth LLC3$4230.00%+3New
Turning Point Benefit Group, Inc.3$4620.00%+3New
DecisionPoint Financial, LLC3$4630.00%00.0%Unchanged
WestEnd Advisors, LLC4$5600.00%−2−33.3%Reduced
TFC Financial Management4$5610.00%+3+300.0%Added
Financial Consulate, Inc4$5610.00%+4New
Breakwater Investment Management4$5610.00%+4New
Atwood & Palmer Inc5$7010.00%00.0%Unchanged
Evermay Wealth Management LLC5$7010.00%00.0%Unchanged
JFS Wealth Advisors, LLC5$7010.00%00.0%Unchanged
Wolff Wiese Magana LLC5$7010.00%00.0%Unchanged
Fairman Group, LLC6$8400.00%00.0%Unchanged
LRI Investments, LLC6$8400.00%00.0%Unchanged
Albion Financial Group6$8410.00%00.0%Unchanged
Quaker Wealth Management, LLC6$8410.00%00.0%Unchanged
Cape Investment Advisory, Inc.7$9810.00%−2−22.2%Reduced
Hazlett, Burt & Watson, Inc.10$1.00K0.00%00.0%Unchanged
FNY Investment Advisers, LLC13$1.00K0.00%+13New
Cloud Capital Management, LLC11$1.00K0.00%+11New
American Capital Advisory, LLC8$1.13K0.00%00.0%Unchanged
Clark Wealth Partners7$1.23K0.00%00.0%Unchanged
Activest Wealth Management9$1.26K0.00%−34−79.1%Reduced
AdvisorNet Financial, Inc9$1.26K0.00%00.0%Unchanged
Wealth Preservation Advisors, LLC9$1.26K0.00%00.0%Unchanged
IMG Wealth Management, Inc.9$1.26K0.00%00.0%Unchanged
Rialto Wealth Management, LLC9$1.26K0.00%+3+50.0%Added
Avalon Trust Co9$1.26K0.00%+9New
Wealth Watch Advisors, INC9$1.26K0.00%+9New
Indiana Trust & Investment Management CO10$1.40K0.00%−10−50.0%Reduced
1 North Wealth Services LLC10$1.40K0.00%00.0%Unchanged
Strategic Investment Solutions, Inc.10$1.40K0.00%00.0%Unchanged
Bare Financial Services, Inc10$1.40K0.00%+10New
Park Place Capital Corp11$1.54K0.00%00.0%Unchanged
Bernard Wealth Management Corp.11$1.54K0.00%00.0%Unchanged
Crewe Advisors LLC11$1.54K0.00%+11New
Hollencrest Capital Management13$1.82K0.00%00.0%Unchanged
NVWM, LLC14$1.96K0.00%00.0%Unchanged
Fortis Group Advisors, LLC15$2.10K0.00%00.0%Unchanged
J.Safra Asset Management Corp15$2.10K0.00%+15New
Accredited Wealth Management, LLC200$2.10K0.00%+185+1,233.3%Added
Financial Management Professionals, Inc.16$2.24K0.00%00.0%Unchanged
Winch Advisory Services, LLC16$2.24K0.00%00.0%Unchanged
Darwin Advisors, LLC16$2.24K0.00%00.0%Unchanged
Plante Moran Financial Advisors, LLC17$2.38K0.00%00.0%Unchanged
Transamerica Financial Advisors, Inc.19$2.66K0.00%+19New
First United Bank Trust20$2.80K0.00%00.0%Unchanged
Colonial Trust Advisors20$2.80K0.00%00.0%Unchanged
Fortitude Family Office, LLC20$2.80K0.00%00.0%Unchanged
Abound Wealth Management22$3.09K0.00%00.0%Unchanged
West Oak Capital, LLC25$3.50K0.00%−20−44.4%Reduced
Consultiva Wealth Management, Corp.25$3.50K0.01%00.0%Unchanged
Westfuller Advisors, LLC26$3.64K0.00%+26New
South State Corp.27$3.78K0.00%−68−71.6%Reduced
Hughes Financial Services, LLC25$3.91K0.00%−4−13.8%Reduced
Bangor Savings Bank28$3.92K0.00%00.0%Unchanged
WPG Advisers, LLC28$3.92K0.00%+25+833.3%Added
Roble, Belko & Company, Inc25$4.00K0.00%00.0%Unchanged
Geneos Wealth Management Inc.29$4.06K0.00%−50−63.3%Reduced
American Wealth Advisors, LLC29$4.06K0.00%+29New
Tower View Investment Management & Research LLC29$4.06K0.00%00.0%Unchanged
St Germain D J Co Inc30$4.20K0.00%00.0%Unchanged
Barrett & Company, Inc.30$4.20K0.00%00.0%Unchanged
Marquette Asset Management, LLC30$4.20K0.00%+30New
Howard Hughes Medical Institute31$4.34K0.00%00.0%Unchanged
GHP Investment Advisors, Inc.31$4.34K0.00%−51−62.2%Reduced
Pinnacle Bancorp, Inc.32$4.48K0.00%00.0%Unchanged
Truvestments Capital LLC33$4.66K0.00%−35−51.5%Reduced
Caldwell Sutter Capital, Inc.34$4.76K0.00%00.0%Unchanged
Sunbelt Securities, Inc.35$4.90K0.00%−442−92.7%Reduced
Rosenberg Matthew Hamilton35$4.90K0.00%00.0%Unchanged
Raffa Wealth Management, LLC35$4.90K0.00%+14+66.7%Added
Kilter Group LLC35$4.90K0.00%+15+75.0%Added
Webster Bank, N. A.36$5.04K0.00%00.0%Unchanged
Ameriflex Group, Inc.36$5.04K0.00%+18+100.0%Added
Byrne Asset Management LLC38$5.32K0.00%+38New
ZRC Wealth Management, LLC39$5.46K0.00%+9+30.0%Added
Cullen/Frost Bankers, Inc.40$5.60K0.00%00.0%Unchanged
Anchor Investment Management, LLC40$5.60K0.00%00.0%Unchanged
Bank Julius Baer & Co. Ltd, Zurich40$5.61K0.00%00.0%Unchanged
Atlantic Trust, LLC41$5.74K0.00%−41−50.0%Reduced
McIlrath & Eck, LLC43$5.98K0.00%00.0%Unchanged
ORG Partners LLC43$6.02K0.00%+20+87.0%Added
Bartlett & Co. Wealth Management LLC43$6.02K0.00%+18+72.0%Added
Marshall & Sterling Wealth Advisors Inc.49$6.86K0.00%00.0%Unchanged