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 2026
Institutional positions in Biogen Inc. as of Jun 30, 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
- 1,047
- +42 vs. Q1 2026
- Shares held
- 142.3M
- +7.45M (+5.5%) vs. Q1 2026
- Total value
- $30.7B
- +$6.00B (+24.3%) vs. Q1 2026
- New holders
- 126
- 427 more added
- Sold out
- 84
- 297 more reduced
10 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1,047 | $30.7B |
| Q1 2026 | 1,015 | $24.7B |
| Q4 2025 | 1,002 | $24.6B |
| Q3 2025 | 909 | $18.4B |
| Q2 2025 | 867 | $16.3B |
| Q1 2025 | 882 | $17.7B |
| Q4 2024 | 879 | $20.2B |
| Q3 2024 | 921 | $25.1B |
| Q2 2024 | 947 | $29.9B |
| Q1 2024 | 955 | $28.0B |
| Q4 2023 | 1,005 | $33.3B |
| Q3 2023 | 966 | $32.2B |
| Q2 2023 | 1,009 | $36.1B |
| Q1 2023 | 1,004 | $35.0B |
| Q4 2022 | 1,033 | $34.6B |
| Q3 2022 | 987 | $33.0B |
| Q2 2022 | 930 | $25.0B |
| Q1 2022 | 954 | $25.9B |
| Q4 2021 | 1,014 | $29.7B |
| Q3 2021 | 1,044 | $35.1B |
| Q2 2021 | 1,107 | $43.6B |
| Q1 2021 | 1,096 | $35.7B |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BNP Paribas Arbitrage, SA | 387,542 | $83.7M | 0.04% | −83,526−17.7% | Reduced |
| National Pension Service | 406,064 | $87.7M | 0.06% | +4,397+1.1% | Added |
| Swiss National Bank | 413,900 | $89.4M | 0.05% | −16,700−3.9% | Reduced |
| Citadel Advisors LLC | 418,356 | $90.4M | 0.05% | +280,263+203.0% | Added |
| LSV Asset Management | 444,049 | $95.9M | 0.17% | +110,310+33.1% | Added |
| Caisse de Depot Et Placement du Quebec | 510,194 | $110.2M | 0.16% | −8,500−1.6% | Reduced |
| HSBC Holdings PLC | 527,866 | $114.0M | 0.05% | +64,214+13.8% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 540,001 | $116.7M | 0.22% | +17,846+3.4% | Added |
| Artemis Investment Management LLP | 570,974 | $123.4M | 1.10% | −597−0.1% | Reduced |
| AustralianSuper Pty Ltd | 672,723 | $145.3M | 0.63% | +56,530+9.2% | Added |
| First Trust Advisors LP | 682,021 | $147.4M | 0.09% | +8,063+1.2% | Added |
| Employees Provident Fund Board | 704,196 | $152.1M | 0.87% | 00.0% | Unchanged |
| Royal Bank of Canada | 708,562 | $153.1M | 0.03% | +177,185+33.3% | Added |
| Citigroup Inc | 734,517 | $158.7M | 0.07% | +234,010+46.8% | Added |
| Massachusetts Financial Services Co | 744,892 | $163.1M | 0.05% | +24,263+3.4% | Added |
| Bank of New York Mellon Corp | 773,619 | $167.1M | 0.03% | −14,904−1.9% | Reduced |
| Price T Rowe Associates Inc | 774,283 | $167.3M | 0.02% | +101,856+15.1% | Added |
| Fred Alger Management, LLC | 788,307 | $170.3M | 0.57% | +55,113+7.5% | Added |
| Robeco Institutional Asset Management B.V. | 791,092 | $170.9M | 0.21% | +27,918+3.7% | Added |
| Vanguard Fiduciary Trust Co | 829,318 | $179.2M | 0.04% | +3,787+0.5% | Added |
| Pictet Asset Management Holding SA | 851,819 | $184.1M | 0.18% | −61,509−6.7% | Reduced |
| Deutsche Bank AG | 894,035 | $193.2M | 0.06% | −169,793−16.0% | Reduced |
| Alyeska Investment Group, L.P. | 932,374 | $201.4M | 0.52% | +127,324+15.8% | Added |
| UBS Group AG | 1,030,150 | $222.6M | 0.04% | +506,700+96.8% | Added |
| Bank of America Corp | 1,116,228 | $241.2M | 0.02% | −40,141−3.5% | Reduced |
| Charles Schwab Investment Management Inc | 1,117,663 | $241.5M | 0.03% | −31,731−2.8% | Reduced |
| Pacer Advisors, Inc. | 1,122,981 | $242.6M | 0.63% | +462,573+70.0% | Added |
| Dimensional Fund Advisors LP | 1,148,568 | $248.2M | 0.04% | +69,449+6.4% | Added |
| Goldman Sachs Group Inc | 1,230,390 | $265.8M | 0.03% | +179,296+17.1% | Added |
| UBS Asset Management Americas Inc | 1,255,168 | $271.2M | 0.05% | −122,400−8.9% | Reduced |
| Boston Partners | 1,263,429 | $272.8M | 0.24% | −436,649−25.7% | Reduced |
| Northern Trust Corp | 1,429,490 | $308.9M | 0.04% | −17,089−1.2% | Reduced |
| Legal & General Group Plc | 1,493,289 | $322.6M | 0.07% | +143,457+10.6% | Added |
| Amundi | 1,516,831 | $327.7M | 0.08% | +726,004+91.8% | Added |
| Invesco Ltd. | 1,803,944 | $389.8M | 0.03% | +58,689+3.4% | Added |
| JPMorgan Chase & Co | 1,823,140 | $394.9M | 0.02% | −192,869−9.6% | Reduced |
| AQR Capital Management LLC | 1,936,859 | $416.9M | 0.15% | +13,302+0.7% | Added |
| Morgan Stanley | 2,411,271 | $521.0M | 0.03% | +240,331+11.1% | Added |
| Norges Bank | 2,580,033 | $557.4M | 0.06% | +2,580,033 | New |
| Wellington Management Group LLP | 3,117,469 | $673.6M | 0.12% | +155,828+5.3% | Added |
| Geode Capital Management, LLC | 4,449,295 | $957.9M | 0.05% | +106,693+2.5% | Added |
| Vanguard Portfolio Management LLC | 6,604,936 | $1.43B | 0.06% | +73,209+1.1% | Added |
| State Street Corp | 7,344,327 | $1.59B | 0.05% | +176,405+2.5% | Added |
| Vanguard Capital Management LLC | 9,651,117 | $2.09B | 0.04% | +113,700+1.2% | Added |
| Primecap Management Co | 15,154,606 | $3.27B | 1.94% | +396,999+2.7% | Added |
| BlackRock, Inc. | 15,985,736 | $3.45B | 0.05% | +11,135+0.1% | Added |
| FMR LLC | 18,217,239 | $3.94B | 0.17% | +5,409,698+42.2% | Added |
| Hara Capital LLC | 0 | $0 | 0.00% | −84−100.0% | Sold out |
| Sofinnova Investments, Inc. | 0 | $0 | 0.00% | −229,521−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −212,921−100.0% | Sold out |
| Logos Global Management LP | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Defilade Capital Management, L.P. | 0 | $0 | 0.00% | −96,289−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −93,964−100.0% | Sold out |
| Glenview Capital Management, LLC | 0 | $0 | 0.00% | −57,019−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −48,828−100.0% | Sold out |
| Tang Capital Management LLC | 0 | $0 | 0.00% | −35,000−100.0% | Sold out |
| Impax Asset Management Group plc | 0 | $0 | 0.00% | −28,728−100.0% | Sold out |
| Atom Investors LP | 0 | $0 | 0.00% | −24,749−100.0% | Sold out |
| Munich Reinsurance Co Stock Corp in Munich | 0 | $0 | 0.00% | −23,942−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −15,736−100.0% | Sold out |
| Dymon Asia Capital (Singapore) Pte. Ltd. | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −14,268−100.0% | Sold out |
| Evoke Wealth, LLC | 0 | $0 | 0.00% | −13,831−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −10,342−100.0% | Sold out |
| GFS Advisors, LLC | 0 | $0 | 0.00% | −23,915−100.0% | Sold out |
| Farringdon Capital, Ltd. | 0 | $0 | 0.00% | −9,054−100.0% | Sold out |
| Scotia Capital Inc. | 0 | $0 | 0.00% | −6,274−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −6,010−100.0% | Sold out |
| Friedenthal Financial | 0 | $0 | 0.00% | −5,930−100.0% | Sold out |
| Taproot Management LP | 0 | $0 | 0.00% | −5,133−100.0% | Sold out |
| Burns Matteson Capital Management, LLC | 0 | $0 | 0.00% | −3,818−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −3,297−100.0% | Sold out |
| ISAM Funds (UK) Ltd | 0 | $0 | 0.00% | −2,916−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −2,348−100.0% | Sold out |
| Quantitative Investment Management, LLC | 0 | $0 | 0.00% | −2,255−100.0% | Sold out |
| Persistent Asset Partners Ltd | 0 | $0 | 0.00% | −1,903−100.0% | Sold out |
| Brand Asset Management Group, Inc. | 0 | $0 | 0.00% | −1,814−100.0% | Sold out |
| Stevens Capital Management LP | 0 | $0 | 0.00% | −1,774−100.0% | Sold out |
| Capital Performance Advisors LLP | 0 | $0 | 0.00% | −1,561−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −1,558−100.0% | Sold out |
| SIH Partners, LLLP | 0 | $0 | 0.00% | −1,463−100.0% | Sold out |
| Wellington-Altus USA Inc. | 0 | $0 | 0.00% | −1,219−100.0% | Sold out |
| GTS Securities LLC | 0 | $0 | 0.00% | −1,381−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −1,335−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −1,335−100.0% | Sold out |
| Collaborative Fund Advisors, LLC | 0 | $0 | 0.00% | −1,327−100.0% | Sold out |
| WMS Group LLC | 0 | $0 | 0.00% | −1,311−100.0% | Sold out |
| Patton Fund Management, Inc. | 0 | $0 | 0.00% | −1,244−100.0% | Sold out |
| Alphadyne Asset Management LP | 0 | $0 | 0.00% | −1,218−100.0% | Sold out |
| Analyst IMS Investment Management Services Ltd. | 0 | $0 | 0.00% | −1,208−100.0% | Sold out |
| Aaron Wealth Advisors | 0 | $0 | 0.00% | −1,185−100.0% | Sold out |
| Tradewinds, LLC. | 0 | $0 | 0.00% | −1,129−100.0% | Sold out |
| Poehling Capital Management, LLC | 0 | $0 | 0.00% | −1,144−100.0% | Sold out |
| Sapient Capital LLC | 0 | $0 | 0.00% | −1,143−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −1,100−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −892−100.0% | Sold out |
| Root Financial Partners, LLC | 0 | $0 | 0.00% | −341−100.0% | Sold out |
| TopTier Wealth Management, LLC | 0 | $0 | 0.00% | −336−100.0% | Sold out |
| Vermillion Wealth Management, Inc. | 0 | $0 | 0.00% | −310−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −398−100.0% | Sold out |