Biogen Inc.

FMR LLC BIIB

Report date

6/30/2026

Quarter

2026 Q2

Filed

8/13/2026

Shares

18,217,239

Value ($000)

3,936,017

Weight

0.2%

2013 Q4 - 2026 Q2 (29 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 Q2	8/13/2026	3,936,017	0.2%	18,217,239	6/30/2026
2026 Q1	5/15/2026	2,348,007	0.1%	12,807,541	3/31/2026
2025 Q4	2/17/2026	1,658,857	0.1%	9,425,863	12/31/2025
2025 Q3	11/13/2025	180,389	0.0%	1,287,760	9/30/2025
2025 Q2	8/14/2025	210,265	0.0%	1,674,220	6/30/2025
2025 Q1	5/12/2025	179,100	0.0%	1,308,828	3/31/2025
2024 Q4	2/13/2025	115,848	0.0%	757,570	12/31/2024
2024 Q3	11/13/2024	73,895	0.0%	381,214	9/30/2024
2024 Q2	8/13/2024	141,507	0.0%	610,416	6/30/2024
2024 Q1	5/13/2024	133,874	0.0%	620,850	3/31/2024
2023 Q4	2/13/2024	259,066	0.0%	1,001,144	12/31/2023
2023 Q3	11/13/2023	349,804	0.0%	1,361,051	9/30/2023
2023 Q2	8/11/2023	752,152	0.1%	2,640,521	6/30/2023
2023 Q1	5/11/2023	487,279	0.0%	1,752,614	3/31/2023
2022 Q4	2/13/2023	335,404	0.0%	1,211,193	12/31/2022
2022 Q3	11/10/2022	394,154	0.0%	1,476,232	9/30/2022
2022 Q2	8/12/2022	209,277	0.0%	1,026,166	6/30/2022
2022 Q1	5/13/2022	81,707	0.0%	387,970	3/31/2022
2021 Q4	2/14/2022	44,937	0.0%	187,301	12/31/2021
2021 Q3	2/14/2022	333,235	0.0%	1,177,553	9/30/2021
2021 Q2	8/13/2021	468,233	0.0%	1,352,218	6/30/2021
2021 Q1	5/14/2021	535,782	0.0%	1,915,216	3/31/2021
2020 Q4	2/8/2021	485,280	0.0%	1,981,868	12/31/2020
2020 Q3	11/13/2020	307,743	0.0%	1,084,826	9/30/2020
2020 Q2	8/24/2020	305,648	0.0%	1,142,394	6/30/2020
2020 Q1	5/14/2020	692,187	0.1%	2,187,836	3/31/2020
2019 Q4	2/7/2020	432,813	0.0%	1,458,609	12/31/2019
2014 Q1	5/15/2014	6,706,300	0.9%	21,925,328	3/31/2014
2013 Q4	2/13/2014	6,725,614	1.0%	24,041,515	12/31/2013