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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, Q2 2025

Institutional positions in Biogen Inc. as of Jun 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
867
−3 vs. Q1 2025
Shares held
130.1M
+498.1K (+0.4%) vs. Q1 2025
Total value
$16.3B
−$1.38B (−7.8%) vs. Q1 2025
New holders
96
342 more added
Sold out
99
263 more reduced

12 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 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 holdersQ2 2025: 867 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 heldQ2 2025: $16.3B
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, Q2 2025

Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q1 2025.

Institutions holding BIIB in Q2 2025
InstitutionSharesValue% of portfolioChange in sharesAction
KCM Investment Advisors LLC2,819$354.0K0.01%−20−0.7%Reduced
Avestar Capital, LLC2,797$351.3K0.03%+622+28.6%Added
Aquatic Capital Management LLC2,792$350.6K0.01%−32,440−92.1%Reduced
Nicolet Bankshares Inc2,790$350.4K0.06%+974+53.6%Added
Kennondale Capital Management LLC2,760$346.6K0.35%00.0%Unchanged
Fiduciary Trust Co2,754$345.9K0.00%−181−6.2%Reduced
Marathon Trading Investment Management LLC2,750$345.4K0.21%00.0%Unchanged
Uncommon Cents Investing LLC2,739$344.0K0.09%−716−20.7%Reduced
Klingenstein Fields & Co LP2,731$343.0K0.01%00.0%Unchanged
Ascent Group, LLC2,714$340.9K0.01%+2,714New
HB Wealth Management, LLC2,712$340.6K0.00%+303+12.6%Added
Summit Trail Advisors, LLC2,687$337.5K0.01%+2,687New
Quarry LP2,681$336.7K0.08%−1,074−28.6%Reduced
GWM Advisors LLC2,673$335.7K0.00%+316+13.4%Added
Summitry LLC2,651$332.9K0.02%+2,651New
Advanced Portfolio Management, LLC2,641$331.7K0.93%00.0%Unchanged
Eagle Global Advisors LLC2,625$329.7K0.01%00.0%Unchanged
Enterprise Bank & Trust Co2,618$328.8K0.12%−45−1.7%Reduced
Westside Investment Management, Inc.2,580$328.5K0.06%−80−3.0%Reduced
DRW Securities, LLC2,578$320.7K0.02%+2,578New
Ocean Capital Management, LLC2,540$319.0K0.07%00.0%Unchanged
Alps Advisors Inc2,531$317.9K0.00%+31+1.2%Added
Exchange Traded Concepts, LLC2,518$316.2K0.00%+113+4.7%Added
Sherbrooke Park Advisers LLC2,512$315.5K0.14%+2,512New
Tema ETFs LLC2,511$315.4K0.08%+10+0.4%Added
Legacy Wealth Asset Management, LLC2,511$315.4K0.08%+91+3.8%Added
Prudential PLC2,508$315.0K0.00%00.0%Unchanged
NJ State Employees Deferred Compensation Plan2,500$314.0K0.04%00.0%Unchanged
DKRT Investments Corp.2,500$314.0K0.08%+2,500New
Avantax Advisory Services, Inc.2,498$313.7K0.00%+2,498New
Magnetar Financial LLC2,484$312.0K0.00%−5,235−67.8%Reduced
TFB Advisors LLC2,471$310.3K0.08%+32+1.3%Added
Chicago Partners Investment Group LLC2,358$308.9K0.01%+2,358New
Callan Family Office, LLC2,454$308.2K0.01%+2,454New
Allegheny Financial Group LTD2,419$303.9K0.07%00.0%Unchanged
Oracle Investment Management Inc2,412$302.9K0.26%00.0%Unchanged
Maven Securities LTD2,404$301.9K0.08%+2,404New
Sectoral Asset Management Inc2,375$298.3K0.20%−480−16.8%Reduced
J. Safra Sarasin Holding AG2,374$298.2K0.01%−7,635−76.3%Reduced
Flagship Harbor Advisors, LLC2,338$293.6K0.01%−102−4.2%Reduced
Wedmont Private Capital2,190$291.3K0.01%+81+3.8%Added
Fayez Sarofim & Co2,300$288.9K0.00%00.0%Unchanged
Integrated Advisors Network LLC2,298$288.6K0.01%+118+5.4%Added
Oppenheimer & Co Inc2,264$284.3K0.00%−2,026−47.2%Reduced
Philadelphia Trust Co2,250$283.0K0.02%00.0%Unchanged
Syon Capital LLC2,252$282.8K0.02%−794−26.1%Reduced
Richwood Investment Advisors, LLC2,248$282.3K0.23%−535−19.2%Reduced
Harbor Capital Advisors, Inc.2,241$281.0K0.01%−12−0.5%Reduced
Kestra Advisory Services, LLC2,227$279.6K0.00%+314+16.4%Added
Trust Co of Toledo NA2,225$279.4K0.03%−39−1.7%Reduced
Allworth Financial LP2,179$273.7K0.00%+1,162+114.3%Added
Navellier & Associates Inc2,164$271.8K0.03%00.0%Unchanged
Capital Investment Advisors, LLC2,164$271.7K0.00%+111+5.4%Added
Evercore Wealth Management, LLC2,142$269.0K0.00%00.0%Unchanged
Great Valley Advisor Group, Inc.2,076$260.7K0.01%−1,215−36.9%Reduced
Proathlete Wealth Management LLC2,069$259.8K0.08%+2+0.1%Added
Huntington National Bank2,050$257.5K0.00%−383−15.7%Reduced
Personal Cfo Solutions, LLC2,017$253.3K0.05%−10−0.5%Reduced
J.W. Cole Advisors, Inc.2,017$253.3K0.01%+2,017New
EverSource Wealth Advisors, LLC2,004$251.7K0.01%+1,012+102.0%Added
Estabrook Capital Management2,000$251.2K0.04%−33−1.6%Reduced
Heritage Wealth Advisors2,000$251.2K0.01%00.0%Unchanged
Northwest & Ethical Investments L.P.2,000$251.2K0.01%00.0%Unchanged
National Asset Management, Inc.1,991$250.1K0.01%−237−10.6%Reduced
Wedbush Securities Inc1,971$248.0K0.01%+436+28.4%Added
Generali Investments, Management Co LLC1,962$246.1K0.06%00.0%Unchanged
SBI Securities Co., Ltd.1,947$244.5K0.01%−28−1.4%Reduced
HighPoint Advisor Group LLC1,946$244.4K0.01%+210+12.1%Added
Atria Investments LLC1,940$243.6K0.00%+243+14.3%Added
Bryn Mawr Trust Co1,935$243.0K0.00%+1,129+140.1%Added
Evergreen Capital Management LLC1,932$242.6K0.01%−1,110−36.5%Reduced
Traub Capital Management LLC1,910$239.9K0.22%+1,910New
Claro Advisors LLC1,902$238.9K0.04%−975−33.9%Reduced
Stratos Wealth Partners, LTD.1,896$238.1K0.00%−340−15.2%Reduced
Flputnam Investment Management Co1,890$237.4K0.00%−190−9.1%Reduced
Forbes J M & Co LLP1,869$234.7K0.02%00.0%Unchanged
Mutual Advisors, LLC1,780$234.1K0.01%+1,780New
Claret Asset Management Corp1,864$234.0K0.03%+1,864New
Cidel Asset Management Inc1,862$233.8K0.01%+190+11.4%Added
Mission Wealth Management, LP1,856$233.1K0.01%+6+0.3%Added
Investors Research Corp1,850$232.3K0.05%+1,850New
Peapack Gladstone Financial Corp1,846$232.0K0.00%+3+0.2%Added
Trail Ridge Investment Advisors, LLC1,807$231.3K0.11%00.0%Unchanged
Rock Point Advisors, LLC1,840$231.1K0.07%00.0%Unchanged
Atomi Financial Group, Inc.1,800$226.1K0.01%+1,800New
Perpetual Ltd1,797$225.7K0.00%00.0%Unchanged
Valeo Financial Advisors, LLC1,794$225.3K0.01%+1,794New
Citizens Financial Group Inc1,791$225.0K0.00%+1,791New
Capital Performance Advisors LLP1,779$223.4K0.04%+284+19.0%Added
Hancock Whitney Corp1,761$221.2K0.00%+81+4.8%Added
Advisory Services Network, LLC1,724$220.7K0.00%−344−16.6%Reduced
Investment House LLC1,730$217.3K0.01%−1,489−46.3%Reduced
MBB Public Markets I LLC1,729$217.1K0.02%−421−19.6%Reduced
Sivia Capital Partners, LLC1,717$215.6K0.07%+1,717New
Clearstead Advisors, LLC1,683$211.4K0.00%+490+41.1%Added
Assetmark, Inc1,681$211.1K0.00%+1,586+1,669.5%Added
Trust Asset Management LLC1,675$210.4K0.02%00.0%Unchanged
RSM US Wealth Management LLC1,671$209.9K0.00%+1,671New
Kathmere Capital Management, LLC1,663$208.9K0.02%+1,663New
Sumitomo Life Insurance Co1,656$208.0K0.01%−55−3.2%Reduced