Biogen Inc.

Robeco Institutional Asset Management B.V. BIIB

Report date

12/31/2025

Quarter

2025 Q4

Filed

1/23/2026

Shares

610,908

Value ($000)

107,514

Weight

0.2%

2013 Q4 - 2025 Q4 (38 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	1/23/2026	107,514	0.2%	610,908	12/31/2025
2025 Q3	10/22/2025	94,001	0.1%	671,054	9/30/2025
2025 Q2	7/18/2025	56,359	0.1%	448,757	6/30/2025
2025 Q1	4/23/2025	62,061	0.1%	453,529	3/31/2025
2024 Q4	1/23/2025	62,434	0.1%	408,276	12/31/2024
2024 Q3	10/29/2024	53,249	0.1%	274,708	9/30/2024
2024 Q2	7/23/2024	49,827	0.1%	214,937	6/30/2024
2024 Q1	4/24/2024	49,922	0.1%	231,516	3/31/2024
2023 Q4	2/14/2024	75,959	0.2%	293,540	12/31/2023
2023 Q3	10/24/2023	87,849	0.2%	341,810	9/30/2023
2023 Q2	7/24/2023	97,765	0.3%	343,217	6/30/2023
2023 Q1	5/4/2023	100,493	0.3%	361,447	3/31/2023
2022 Q4	2/7/2023	86,719	0.2%	313,157	12/31/2022
2022 Q3	12/1/2022	82,186	0.3%	307,816	9/30/2022
2022 Q2	12/1/2022	37,017	0.1%	181,511	6/30/2022
2022 Q1	12/1/2022	37,403	0.1%	177,596	3/31/2022
2021 Q4	12/1/2022	45,890	0.1%	191,265	12/31/2021
2021 Q3	12/1/2022	48,722	0.1%	172,161	9/30/2021
2021 Q2	12/1/2022	56,939	0.1%	164,445	6/30/2021
2021 Q1	12/1/2022	77,093	0.2%	275,589	3/31/2021
2020 Q4	12/1/2022	79,458	0.2%	324,499	12/31/2020
2020 Q3	1/19/2021	159,728	0.5%	563,066	9/30/2020
2020 Q2	1/19/2021	107,729	0.4%	402,658	6/30/2020
2020 Q1	1/19/2021	82,083	0.3%	259,448	3/31/2020
2019 Q4	1/19/2021	65,293	0.2%	220,041	12/31/2019
2019 Q3	1/19/2021	55,265	0.2%	237,355	9/30/2019
2019 Q2	1/19/2021	70,963	0.3%	303,431	6/30/2019
2019 Q1	1/19/2021	106,762	0.4%	451,657	3/31/2019
2018 Q4	1/19/2021	112,766	0.5%	375,027	12/31/2018
2018 Q3	1/19/2021	128,788	0.5%	364,516	9/30/2018
2018 Q2	1/19/2021	121,078	0.6%	417,161	6/30/2018
2018 Q1	1/19/2021	117,973	0.6%	430,838	3/31/2018
2017 Q4	1/19/2021	92,792	0.5%	291,276	12/31/2017
2017 Q3	1/19/2021	47,515	0.3%	151,747	9/30/2017
2017 Q2	1/19/2021	41,146	0.3%	151,631	6/30/2017
2017 Q1	1/19/2021	42,572	0.3%	155,703	3/31/2017
2014 Q1	5/7/2014	2,515	0.0%	8,224	3/31/2014
2013 Q4	2/4/2014	11,827	0.1%	42,279	12/31/2013