Biogen Inc.

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND BIIB

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/13/2026

Shares

42,742

Value ($000)

7,522

Weight

0.0%

2019 Q4 - 2025 Q4 (21 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	7,522	0.0%	42,742	12/31/2025
2025 Q3	11/13/2025	6,716	0.0%	47,947	9/30/2025
2025 Q2	8/13/2025	7,063	0.0%	56,238	6/30/2025
2025 Q1	5/14/2025	8,778	0.0%	64,150	3/31/2025
2024 Q4	2/14/2025	27,810	0.1%	181,859	12/31/2024
2024 Q3	11/13/2024	5,368	0.0%	27,691	9/30/2024
2024 Q2	9/20/2024	9,898	0.0%	42,696	6/30/2024
2023 Q4	3/21/2024	6,469	0.0%	25,000	12/31/2023
2022 Q4	2/13/2023	2,329	0.0%	8,411	12/31/2022
2022 Q3	11/14/2022	199	0.0%	746	9/30/2022
2022 Q2	8/11/2022	138	0.0%	677	6/30/2022
2022 Q1	5/12/2022	48	0.0%	230	3/31/2022
2021 Q4	2/11/2022	3,409	0.0%	14,207	12/31/2021
2021 Q3	11/10/2021	65	0.0%	230	9/30/2021
2021 Q2	8/12/2021	80	0.0%	230	6/30/2021
2021 Q1	5/13/2021	64	0.0%	230	3/31/2021
2020 Q4	3/1/2021	57	0.0%	232	12/31/2020
2020 Q3	3/1/2021	235	0.0%	828	9/30/2020
2020 Q2	3/1/2021	266	0.0%	995	6/30/2020
2020 Q1	5/13/2020	31,658	0.3%	100,064	3/31/2020
2019 Q4	2/12/2020	29,779	0.1%	100,358	12/31/2019