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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, Q1 2026

Institutional positions in Biogen Inc. as of Mar 31, 2026. 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
1,015
+33 vs. Q4 2025
Shares held
135.0M
+15.4M (+12.9%) vs. Q4 2025
Total value
$24.7B
+$3.70B (+17.6%) vs. Q4 2025
New holders
138
402 more added
Sold out
105
290 more reduced

20 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 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 holdersQ1 2026: 1,015 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 heldQ1 2026: $24.7B
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, Q1 2026

Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q4 2025.

Institutions holding BIIB in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Premier Path Wealth Partners, LLC3,523$645.8K0.08%−2,207−38.5%Reduced
Pavaki Capital Management LLC3,500$641.7K0.45%00.0%Unchanged
STRS Ohio3,494$640.6K0.00%−5−0.1%Reduced
Hills Bank & Trust Co3,490$639.8K0.03%−1,129−24.4%Reduced
Lifeworks Advisors, LLC3,465$635.2K0.08%−468−11.9%Reduced
Everence Capital Management Inc3,450$632.0K0.04%00.0%Unchanged
Winton Group Ltd3,297$604.4K0.02%−6,848−67.5%Reduced
Vestcor Inc3,246$595.0K0.02%00.0%Unchanged
South Dakota Investment Council3,213$589.0K0.01%00.0%Unchanged
Sax Wealth Advisors, LLC3,330$586.0K0.03%00.0%Unchanged
IKE Capital, LLC3,194$585.6K0.33%00.0%Unchanged
Massachusetts Wealth Management3,180$583.0K0.25%+181+6.0%Added
EverSource Wealth Advisors, LLC3,178$582.7K0.02%+780+32.5%Added
Warren Averett Asset Management, LLC3,151$577.7K0.00%+358+12.8%Added
Syon Capital LLC3,130$573.8K0.03%−16−0.5%Reduced
Bessemer Group Inc3,127$573.0K0.00%+416+15.3%Added
RDA Financial Network3,125$572.9K0.14%−75−2.3%Reduced
Emerald Mutual Fund Advisers Trust3,117$571.4K0.03%+652+26.5%Added
F/M Investments LLC3,117$571.4K0.04%+652+26.5%Added
Cambridge Investment Research Advisors, Inc.3,113$571.0K0.00%−4,706−60.2%Reduced
Evergreen Capital Management LLC3,081$564.8K0.01%+493+19.0%Added
Providence First Trust Co3,079$564.5K0.20%+3,079New
NLB Skladi, upravljanje premozenja, d.o.o.3,055$560.1K0.03%−18,952−86.1%Reduced
Prime Capital Investment Advisors, LLC3,030$555.4K0.01%−196−6.1%Reduced
Sivia Capital Partners, LLC3,003$550.5K0.11%+688+29.7%Added
Roberts Glore & Co Inc3,001$550.2K0.15%−80−2.6%Reduced
Trust Co of Toledo NA2,965$543.6K0.05%+458+18.3%Added
Atlas Capital Advisors LLC2,958$542.3K0.06%+114+4.0%Added
Hunter Associates Investment Management LLC2,939$539.0K0.07%+53+1.8%Added
Motley Fool Asset Management LLC2,919$535.1K0.02%+378+14.9%Added
ISAM Funds (UK) Ltd2,916$534.6K0.26%+2,916New
Legacy Capital Group California, Inc.2,901$531.8K0.20%+2,901New
DGS Capital Management, LLC2,886$529.1K0.09%+704+32.3%Added
Pictet & Cie (Europe) SA2,880$528.0K0.01%−89−3.0%Reduced
Tower Trust & Investment Co2,868$525.7K0.35%+11+0.4%Added
Horizon Kinetics Asset Management LLC2,857$523.8K0.01%−131−4.4%Reduced
Wedmont Private Capital2,908$523.1K0.02%+115+4.1%Added
Aprio Wealth Management, LLC2,850$522.5K0.03%+900+46.2%Added
Cim Investment Mangement Inc2,830$518.8K0.14%−14−0.5%Reduced
Tiaa-Cref Individual & Institutional Services, LLC2,817$516.4K0.00%+2,817New
KCM Investment Advisors LLC2,803$513.9K0.02%+4+0.1%Added
Caerus Investment Advisors, LLC2,801$513.5K0.22%+134+5.0%Added
Uncommon Cents Investing LLC2,779$509.5K0.12%00.0%Unchanged
Empirical Financial Services, LLC d.b.a. Empirical Wealth Management2,751$504.3K0.01%+533+24.0%Added
Waterfront Wealth Inc.2,747$503.6K0.09%−22−0.8%Reduced
Atomi Financial Group, Inc.2,742$502.6K0.02%−536−16.4%Reduced
Klingenstein Fields & Co LP2,731$500.7K0.02%00.0%Unchanged
CSS LLC2,720$498.7K0.03%−3,360−55.3%Reduced
Oppenheimer & Co Inc2,720$498.7K0.01%+2,720New
Steel Peak Wealth Management LLC2,704$495.8K0.02%+2,704New
Assetmark, Inc2,690$493.2K0.00%+298+12.5%Added
Frec Markets, Inc.2,628$481.8K0.08%+474+22.0%Added
Tema ETFs LLC2,627$481.6K0.03%+7+0.3%Added
Advus Financial Partners, LLC2,622$480.7K0.12%+492+23.1%Added
Huntington National Bank2,607$477.9K0.00%+160+6.5%Added
Westside Investment Management, Inc.2,637$477.9K0.07%+125+5.0%Added
Eagle Global Advisors LLC2,600$476.7K0.02%00.0%Unchanged
Pitcairn Wealth Advisors LLC2,697$474.6K0.04%+132+5.1%Added
Ocean Capital Management, LLC2,540$465.7K0.10%+125+5.2%Added
Clearstead Advisors, LLC2,523$462.5K0.00%+274+12.2%Added
Prudential PLC2,508$459.8K0.00%00.0%Unchanged
DKRT Investments Corp.2,500$458.3K0.12%00.0%Unchanged
Crestwood Advisors Group LLC2,481$454.8K0.01%+287+13.1%Added
Atria Investments LLC2,437$446.8K0.00%−766−23.9%Reduced
Blackhawk Capital Partners LLC.2,426$444.8K0.16%+339+16.2%Added
TFB Advisors LLC2,423$444.2K0.23%−25−1.0%Reduced
RSM US Wealth Management LLC2,380$436.3K0.01%+3+0.1%Added
Personal Cfo Solutions, LLC2,362$433.0K0.06%−41−1.7%Reduced
PDT Partners, LLC2,348$430.5K0.03%00.0%Unchanged
Citizens Financial Group Inc2,346$430.2K0.01%+549+30.6%Added
TCW Group Inc2,338$428.6K0.00%+112+5.0%Added
Philip James Wealth Mangement, LLC2,323$425.9K0.05%−5−0.2%Reduced
Fayez Sarofim & Co2,300$421.7K0.00%00.0%Unchanged
Waddell & Associates, LLC2,264$415.1K0.02%+522+30.0%Added
Quantitative Investment Management, LLC2,255$413.0K0.04%+641+39.7%Added
Inceptionr LLC2,248$412.1K0.10%−2,628−53.9%Reduced
Concurrent Investment Advisors, LLC2,222$407.3K0.00%−2,154−49.2%Reduced
Baker Avenue Asset Management, LP2,207$404.6K0.01%+610+38.2%Added
Oppenheimer Asset Management Inc.2,204$404.1K0.00%−808−26.8%Reduced
Smartleaf Asset Management LLC2,125$398.6K0.01%+273+14.7%Added
Simplex Trading, LLC2,164$396.7K0.01%−28,714−93.0%Reduced
Navellier & Associates Inc2,164$396.7K0.04%00.0%Unchanged
Tower Research Capital LLC (TRC)2,159$395.8K0.01%−1,672−43.6%Reduced
Hantz Financial Services, Inc.2,157$395.0K0.01%+321+17.5%Added
Simplicity Wealth,LLC2,149$394.0K0.02%+197+10.1%Added
Parcion Private Wealth LLC2,140$392.3K0.02%+44+2.1%Added
Cidel Asset Management Inc2,129$390.3K0.02%+190+9.8%Added
DoubleLine ETF Adviser LP2,125$389.6K0.15%+2,125New
Evercore Wealth Management, LLC2,112$387.2K0.01%−30−1.4%Reduced
National Asset Management, Inc.2,064$387.1K0.03%+68+3.4%Added
Sectoral Asset Management Inc1,850$385.9K0.32%−305−14.2%Reduced
Capital Investment Advisors, LLC2,087$382.6K0.01%+86+4.3%Added
BSW Wealth Partners2,074$380.2K0.05%+165+8.6%Added
Agp Franklin, LLC2,073$380.0K0.19%+2,073New
Procyon Private Wealth Partners, LLC2,063$378.2K0.02%+666+47.7%Added
Richwood Investment Advisors, LLC2,032$372.6K0.29%−90−4.2%Reduced
Heritage Wealth Advisors2,009$368.3K0.01%+9+0.4%Added
Estabrook Capital Management2,000$366.7K0.05%00.0%Unchanged
Northwest & Ethical Investments L.P.2,000$366.7K0.01%00.0%Unchanged
Proathlete Wealth Management LLC1,944$356.4K0.10%−164−7.8%Reduced