BIIB · Company research
Biogen Inc. Common Stock (BIIB): Ownership & Institutional Holders
Reported institutional positions. Filing dates and sources matter.
RESEARCH CONTEXT
Understand the numbers
Reported institutional positions. Filing dates and sources matter. Use period, currency, units and source fields when interpreting values.
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Ownership & Institutional Holders data
Database-backed records only
| holder name | cik | period end | shares held | market value | ownership percent | shares change | shares change percent | filing date | data source |
|---|---|---|---|---|---|---|---|---|---|
| Tompkins Financial Corporation | 1005817 | Wed Sep 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2200 | 496936000 | — | — | — | Oct 5, 2026 | SEC_13F_HR |
| Maven Securities LTD | 1633046 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12200 | 2636176 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Chevy Chase Trust Holdings, LLC | 1462020 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 69138 | 14937956 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| TRB Wealth Management, LLC | 2130988 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1097 | 237018 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 1368163 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 540001 | 116672616 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Bayforest Capital Ltd | 2048423 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 667 | 144112 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| INDEPENDENT FINANCIAL GROUP, LLC | 275484 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5364 | 1158945 | — | — | — | Jul 15, 2026 | SEC_13F_DATASET |
| Swedbank AB | 946431 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 320614 | 69271861 | — | — | — | Jul 15, 2026 | SEC_13F_DATASET |
| Tradewinds, LLC. | 1932342 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 31102 | 167879 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Corecam Pte. Ltd. | 2106977 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1000 | 216060 | — | — | — | Jul 14, 2026 | SEC_13F_DATASET |
| FULLER & THALER ASSET MANAGEMENT, INC. | 1082327 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 17156 | 3706725 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| State of Tennessee, Department of Treasury | 1587973 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 39265 | 8483596000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| ROSS\JOHNSON & Associates LLC | 2056532 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1 | 216 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 129599 | 28001160 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| MML INVESTORS SERVICES, LLC | 701059 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 18651 | 4029827 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| NOMURA ASSET MANAGEMENT CO LTD | 1055964 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 54960 | 11874658 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Caitong International Asset Management Co., Ltd | 1963355 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 14 | 3025 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| MCF Advisors LLC | 1602905 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 381 | 82320 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Generali Investments CEE, investicni spolecnost, a.s. | 2047540 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 43552 | 9409845 | — | — | — | Jul 13, 2026 | SEC_13F_DATASET |
| Portolan Capital Management, LLC | 1350290 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 142856 | 30865467 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| AEGON ASSET MANAGEMENT UK Plc | 1539994 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 241101 | 52092282 | — | — | — | Jul 13, 2026 | SEC_13F_DATASET |
| UBS Group AG | 1610520 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 805257 | 173983827 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| HANTZ FINANCIAL SERVICES, INC. | 1071061 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2424 | 524 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Concurrent Investment Advisors, LLC | 2001015 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1741 | 376160 | — | — | — | Jul 27, 2026 | SEC_13F_DATASET |
| Cetera Trust Company, N.A | 2005547 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 75 | 16205 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| TD Asset Management Inc | 1056053 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 57805 | 12489348 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| LEUTHOLD GROUP, LLC | 1170152 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 31489 | 6803513 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| CIBC Bancorp USA Inc. | 1711924 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 326 | 69105 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| D.A. DAVIDSON & CO. | 1080107 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1164 | 251494 | — | — | — | Jul 24, 2026 | SEC_13F_DATASET |
| PROFUND ADVISORS LLC | 1129919 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 8560 | 1849474 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Pallas Capital Advisors LLC | 1862282 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12859 | 2778316 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| State of New Jersey Common Pension Fund D | 1483066 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 47453 | 10252695 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| AMERIPRISE FINANCIAL INC | 820027 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 55961 | 12090933 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| DLD Asset Management, LP | 1578299 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 37500 | 8101125 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Massachusetts Wealth Management | 1966011 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3230 | 697874 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| S-Bank Fund Management Ltd | 2036461 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1792 | 387180 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| Cornerstone Financial Management LLC | 2110329 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 82 | 17717000 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| MARSHALL WACE, LLP | 1318757 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6554 | 1416057 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Everhart Financial Group, Inc. | 1852858 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1840 | 397550 | — | — | — | Jul 9, 2026 | SEC_13F_DATASET |
| ELEVATION POINT WEALTH PARTNERS, LLC | 1744349 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3519 | 760316 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Privium Fund Management B.V. | 1795097 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 48400 | 10457304 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Principia Wealth Advisory, LLC | 2041436 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 189 | 40835000 | — | — | — | Aug 26, 2026 | SEC_13F_DATASET |
| Wealthspire Advisors, LLC | 1646247 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1607 | 347208 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Rakuten Securities, Inc. | 2009539 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15 | 3241 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Vident Advisory, LLC | 1744347 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2707 | 584874 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Caldwell Trust Co | 2080218 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 383 | 82751 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| FIL Ltd | 318989 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 312212 | 67456525 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Man Group plc | 1637460 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 184433 | 39848594 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| QUADRANT CAPITAL GROUP LLC | 1650717 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 8289 | 1790921000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| JNBA Financial Advisors | 1569118 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 422 | 91178 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| FMR LLC | 315066 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 11482904 | 2480996199 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Vontobel Holding Ltd. | 1588340 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 27400 | 5920044 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| EP Wealth Advisors, LLC | 1540569 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2024 | 437264 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| FINANCIAL CONSULATE, INC | 1624510 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23 | 4970 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| Prosperity Bancshares Inc | 1068851 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 40 | 8642 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Quotient Wealth Partners, LLC | 2004904 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1047 | 226259 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| Missouri Trust & Investment Co | 1908186 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 9820 | 1992969 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| 1 NORTH WEALTH SERVICES LLC | 1641761 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10 | 2161 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| Smartleaf Asset Management LLC | 2010393 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2125 | 460388 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Vanguard Personalized Indexing Management, LLC | 1767306 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 37015 | 7997461 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| FRANKLIN RESOURCES INC | 38777 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 91250 | 19715475 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| MJT & Associates Financial Advisory Group, Inc. | 2065777 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15 | 3241000 | — | — | — | Jul 6, 2026 | SEC_13F_DATASET |
| KENNEDY CAPITAL MANAGEMENT LLC | 884589 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10098 | 2181774 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Savvy Advisors, Inc. | 2003633 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3996 | 863429 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| Keebeck Wealth Management | 1803675 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1395 | 301404 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Encore Global Management, LP | 2135356 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 500 | 108030 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Navigoe, LLC | 2056100 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 4 | 0 | — | — | — | Jul 31, 2026 | SEC_13F_DATASET |
| HORIZON KINETICS ASSET MANAGEMENT LLC | 1056823 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2726 | 588980 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Convergence Investment Partners, LLC | 1456133 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23321 | 5038735 | — | — | — | Jul 31, 2026 | SEC_13F_DATASET |
| Stratos Wealth Partners, LTD. | 1612865 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1899 | 410484 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| ROYAL LONDON ASSET MANAGEMENT LTD | 863748 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 64751 | 13990101 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Merrithew & Thorsten Inc | 2107460 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 106 | 22 | — | — | — | Jul 31, 2026 | SEC_13F_DATASET |
| ProShare Advisors LLC | 1357955 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 35127 | 7589539 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Econ Financial Services Corp | 1659718 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6300 | 1361178 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| Orion Investment Co | 2033920 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 39571 | 8549710 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| DIMENSIONAL FUND ADVISORS LP | 354204 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 847893 | 183196029 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Avion Wealth | 1792704 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 96 | 20 | — | — | — | Jul 31, 2026 | SEC_13F_DATASET |
| Artemis Investment Management LLP | 1535385 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 570974 | 123364642 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| Amundi | 1330387 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 915718 | 197850031 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Smallwood Wealth Investment Management, LLC | 1921304 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 70 | 15124 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
Informational research only, not financial advice. Forecasts are uncertain and can be wrong.