Biogen Inc.

NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC BIIB

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/5/2026

Shares

4,687

Value ($000)

825

Weight

0.0%

2019 Q4 - 2025 Q4 (25 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	2/5/2026	825	0.0%	4,687	12/31/2025
2025 Q3	11/7/2025	655	0.0%	4,673	9/30/2025
2025 Q2	8/12/2025	587	0.0%	4,674	6/30/2025
2025 Q1	5/14/2025	637	0.0%	4,656	3/31/2025
2024 Q4	2/11/2025	707	0.0%	4,626	12/31/2024
2024 Q3	11/13/2024	895	0.0%	4,616	9/30/2024
2024 Q2	8/15/2024	1,074	0.0%	4,634	6/30/2024
2024 Q1	5/15/2024	991	0.0%	4,598	3/31/2024
2023 Q4	2/13/2024	1,187	0.0%	4,586	12/31/2023
2023 Q3	11/14/2023	1,175	0.0%	4,571	9/30/2023
2023 Q2	8/14/2023	1,300	0.0%	4,565	6/30/2023
2023 Q1	5/15/2023	1,258	0.0%	4,526	3/31/2023
2022 Q4	2/21/2023	1,249	0.0%	4,512	12/31/2022
2022 Q3	11/14/2022	1,439	0.0%	5,389	9/30/2022
2022 Q2	8/4/2022	1,194	0.0%	5,853	6/30/2022
2022 Q1	5/9/2022	1,369	0.0%	6,501	3/31/2022
2021 Q4	2/3/2022	1,748	0.0%	7,286	12/31/2021
2021 Q3	11/15/2021	2,116	0.0%	7,477	9/30/2021
2021 Q2	8/13/2021	2,367	0.0%	6,836	6/30/2021
2021 Q1	5/14/2021	1,932	0.0%	6,905	3/31/2021
2020 Q4	2/12/2021	2,068	0.0%	8,444	12/31/2020
2020 Q3	11/13/2020	2,399	0.0%	8,965	9/30/2020
2020 Q2	8/14/2020	2,399	0.0%	8,965	6/30/2020
2020 Q1	5/8/2020	2,976	0.0%	9,407	3/31/2020
2019 Q4	2/7/2020	2,080	0.0%	7,009	12/31/2019