Biogen Inc.

CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM BIIB

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/12/2026

Shares

330,806

Value ($000)

58,219

Weight

0.0%

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	2/12/2026	58,219	0.0%	330,806	12/31/2025
2025 Q3	11/14/2025	48,158	0.0%	343,786	9/30/2025
2025 Q2	8/13/2025	42,581	0.0%	339,050	6/30/2025
2025 Q1	5/13/2025	52,696	0.0%	385,094	3/31/2025
2024 Q4	4/23/2025	60,839	0.0%	397,849	12/31/2024
2024 Q3	11/13/2024	76,581	0.1%	395,071	9/30/2024
2024 Q2	8/14/2024	91,816	0.1%	396,065	6/30/2024
2024 Q1	4/30/2024	87,205	0.1%	404,419	3/31/2024
2023 Q4	2/1/2024	93,988	0.1%	363,209	12/31/2023
2023 Q3	11/2/2023	72,262	0.1%	281,163	9/30/2023
2023 Q2	8/9/2023	78,229	0.1%	274,631	6/30/2023
2023 Q1	5/12/2023	86,083	0.1%	309,617	3/31/2023
2022 Q4	2/8/2023	102,984	0.1%	371,892	12/31/2022
2022 Q3	11/9/2022	103,060	0.1%	385,993	9/30/2022
2022 Q2	8/10/2022	75,845	0.1%	371,897	6/30/2022
2022 Q1	5/4/2022	89,791	0.1%	426,356	3/31/2022
2021 Q4	2/10/2022	108,142	0.1%	450,741	12/31/2021
2021 Q3	11/10/2021	132,515	0.1%	468,268	9/30/2021
2021 Q2	8/13/2021	163,961	0.1%	473,506	6/30/2021
2021 Q1	5/14/2021	104,264	0.1%	372,703	3/31/2021
2020 Q4	2/2/2021	94,938	0.1%	387,722	12/31/2020
2020 Q3	11/5/2020	107,613	0.1%	379,347	9/30/2020
2020 Q2	8/12/2020	101,230	0.1%	378,360	6/30/2020
2020 Q1	5/12/2020	127,276	0.2%	402,289	3/31/2020
2019 Q4	1/27/2020	134,776	0.1%	454,203	12/31/2019
2014 Q1	4/18/2014	234,956	0.3%	821,756	3/31/2014
2013 Q4	2/13/2014	224,082	0.3%	796,482	12/31/2013