Biogen INC Schedule 13G passive stakes

FMR LLC and Abigail P. Johnson have updated their Schedule 13G filing, reporting a combined beneficial ownership of 12.4% of Biogen Inc.'s common stock as of June 30, 2026.

FMR LLC and Abigail P. Johnson have filed a Schedule 13G reporting beneficial ownership of 11.3% of Biogen Inc. common stock.

FMR LLC, along with Abigail P. Johnson, has filed a Schedule 13G, reporting beneficial ownership of 12,807,541.50 shares of Biogen Inc. common stock, representing 8.7% of the class.

Vanguard Capital Management has disclosed beneficial ownership of 10,989,562 shares, representing 7.48% of Biogen Inc.'s common stock as of March 31, 2026.

The Vanguard Group has reported 0% beneficial ownership in Biogen Inc. common stock following an internal realignment that disaggregated reporting responsibilities.

FMR LLC and its affiliates, including Abigail P. Johnson, reported a 6.4% beneficial ownership stake in Biogen Inc. common stock as of December 31, 2025.

PRIMECAP Management Co. reports an increased beneficial ownership of 10.2% in Biogen Inc., holding nearly 15 million shares.

State Street Corporation has reported a 5% beneficial ownership stake in Biogen Inc. common stock, held in the ordinary course of business.

BlackRock, Inc. has filed an amended Schedule 13G, disclosing its beneficial ownership of 8.5% of Biogen Inc.'s common stock as of March 31, 2025.