Biogen Inc.

SYSTEMATIC FINANCIAL MANAGEMENT LP BIIB

Report date

3/31/2026

Quarter

2026 Q1

Filed

5/13/2026

Shares

16,220

Value ($000)

2,974

Weight

0.1%

2013 Q3 - 2026 Q1 (30 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
2026 Q1	5/13/2026	2,974	0.1%	16,220	3/31/2026
2025 Q4	2/9/2026	2,928	0.1%	16,640	12/31/2025
2025 Q3	11/13/2025	654	0.0%	4,670	9/30/2025
2025 Q2	8/13/2025	587	0.0%	4,670	6/30/2025
2025 Q1	5/14/2025	639	0.0%	4,670	3/31/2025
2024 Q4	2/14/2025	714	0.0%	4,670	12/31/2024
2024 Q3	11/14/2024	905	0.0%	4,670	9/30/2024
2024 Q2	8/16/2024	1,083	0.0%	4,670	6/30/2024
2024 Q1	5/15/2024	897	0.0%	4,160	3/31/2024
2023 Q4	2/14/2024	430	0.0%	1,660	12/31/2023
2023 Q3	11/14/2023	427	0.0%	1,660	9/30/2023
2023 Q2	8/14/2023	467	0.0%	1,640	6/30/2023
2023 Q1	5/12/2023	456	0.0%	1,640	3/31/2023
2022 Q4	2/15/2023	443	0.0%	1,600	12/31/2022
2022 Q3	11/14/2022	427	0.0%	1,600	9/30/2022
2022 Q2	8/15/2022	326	0.0%	1,600	6/30/2022
2022 Q1	5/11/2022	337	0.0%	1,600	3/31/2022
2021 Q4	2/14/2022	384	0.0%	1,600	12/31/2021
2021 Q3	11/12/2021	453	0.0%	1,600	9/30/2021
2021 Q2	8/12/2021	554	0.0%	1,600	6/30/2021
2021 Q1	5/10/2021	448	0.0%	1,600	3/31/2021
2020 Q4	2/12/2021	392	0.0%	1,600	12/31/2020
2020 Q3	11/12/2020	454	0.0%	1,600	9/30/2020
2020 Q2	8/13/2020	428	0.0%	1,600	6/30/2020
2020 Q1	5/12/2020	506	0.0%	1,600	3/31/2020
2019 Q4	2/14/2020	475	0.0%	1,600	12/31/2019
2014 Q2	8/11/2014	882	0.0%	2,800	6/30/2014
2014 Q1	8/11/2014	856	0.0%	2,800	3/31/2014
2013 Q4	8/11/2014	782	0.0%	2,800	12/31/2013
2013 Q3	8/11/2014	674	0.0%	2,800	9/30/2013