Biogen Inc.

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC BIIB

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/13/2026

Shares

1,391,370

Value ($000)

244,867

Weight

0.1%

2013 Q4 - 2025 Q4 (27 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/13/2026	244,867	0.1%	1,391,370	12/31/2025
2025 Q3	11/14/2025	201,604	0.0%	1,439,208	9/30/2025
2025 Q2	8/14/2025	218,930	0.0%	1,743,209	6/30/2025
2025 Q1	5/19/2025	206,681	0.1%	1,510,386	3/31/2025
2024 Q4	2/14/2025	234,551	0.1%	1,533,813	12/31/2024
2024 Q3	11/14/2024	223,438	0.1%	1,152,691	9/30/2024
2024 Q2	8/14/2024	262,834	0.1%	1,133,786	6/30/2024
2024 Q1	5/15/2024	209,623	0.1%	972,143	3/31/2024
2023 Q4	2/14/2024	262,544	0.1%	1,014,583	12/31/2023
2023 Q3	11/13/2023	273,849	0.1%	1,065,518	9/30/2023
2023 Q2	8/11/2023	309,893	0.2%	1,114,602	6/30/2023
2023 Q1	5/15/2023	309,893	0.2%	1,114,602	3/31/2023
2022 Q4	2/14/2023	303,003	0.2%	1,094,191	12/31/2022
2022 Q3	11/14/2022	298,094	0.2%	1,116,456	9/30/2022
2022 Q2	8/12/2022	236,012	0.1%	1,157,263	6/30/2022
2022 Q1	5/16/2022	244,994	0.1%	1,163,312	3/31/2022
2021 Q4	2/14/2022	278,140	0.1%	1,159,302	12/31/2021
2021 Q3	11/15/2021	352,319	0.1%	1,244,986	9/30/2021
2021 Q2	8/16/2021	394,219	0.2%	1,138,473	6/30/2021
2021 Q1	5/14/2021	324,450	0.1%	1,159,784	3/31/2021
2020 Q4	3/1/2021	291,481	0.1%	1,190,397	12/31/2020
2020 Q3	11/13/2020	377,195	0.2%	1,329,648	9/30/2020
2020 Q2	8/14/2020	350,162	0.2%	1,308,771	6/30/2020
2020 Q1	5/15/2020	346,265	0.2%	1,094,458	3/31/2020
2019 Q4	2/14/2020	328,584	0.2%	1,107,351	12/31/2019
2014 Q1	5/23/2014	539,575	0.6%	1,764,066	3/31/2014
2013 Q4	1/31/2014	453,886	0.5%	1,622,467	12/31/2013