Year archive

BIOGEN INC. — 2025 filings

All 71 regulatory filings released by BIOGEN INC. (BIIB) in 2025, sourced directly from the official regulator.

71 Filings

2025 Period

2025 filings (71)

Filing	Released	Lang
PRIMARY DOCUMENT Director's Dealing	2025-12-03	English
Major Shareholding Notification 2025 Major Shareholding Notification	2025-11-13	English
PRIMARY DOCUMENT Director's Dealing	2025-11-04	English
10-Q Interim / Quarterly Report Q3 2025	2025-10-30	English
8-K Regulatory Filings	2025-10-30	English
8-K Regulatory Filings	2025-10-14	English
PRIMARY DOCUMENT Director's Dealing	2025-10-06	English
PRIMARY DOCUMENT Director's Dealing	2025-09-02	English
Regulatory Filings 2025 Regulatory Filings	2025-09-02	English
8-K Regulatory Filings	2025-07-31	English
10-Q Interim / Quarterly Report Q2 2025	2025-07-31	English
Major Shareholding Notification 2025 Major Shareholding Notification	2025-07-30	English
Major Shareholding Notification 2025 Major Shareholding Notification	2025-07-21	English
PRIMARY DOCUMENT Director's Dealing	2025-07-16	English
Regulatory Filings 2025 Regulatory Filings	2025-07-08	English
8-K Regulatory Filings	2025-07-07	English
8-K Regulatory Filings	2025-06-23	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
PRIMARY DOCUMENT Director's Dealing	2025-06-18	English
DEFA14A Regulatory Filings	2025-06-02	English
PRIMARY DOCUMENT Director's Dealing	2025-05-20	English
Regulatory Filings 2025 Regulatory Filings	2025-05-19	English
8-K Regulatory Filings	2025-05-12	English
424B2 Prospectus	2025-05-08	English
FWP Regulatory Filings	2025-05-06	English
424B2 Prospectus	2025-05-06	English
PRIMARY DOCUMENT Director's Dealing	2025-05-05	English
PRIMARY DOCUMENT Director's Dealing	2025-05-05	English
S-3ASR Registration Form	2025-05-01	English
10-Q Interim / Quarterly Report Q1 2025	2025-05-01	English
8-K Regulatory Filings	2025-05-01	English
ARS Annual Report	2025-04-25	English
DEFA14A Regulatory Filings	2025-04-25	English
DEF 14A Proxy Solicitation & Information Statement	2025-04-25	English
Major Shareholding Notification 2025 Major Shareholding Notification	2025-04-17	English
PRIMARY DOCUMENT Director's Dealing	2025-04-03	English
PRIMARY DOCUMENT Director's Dealing	2025-03-10	English
PRIMARY DOCUMENT Director's Dealing	2025-03-10	English
Regulatory Filings 2025 Regulatory Filings	2025-03-07	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-12	English
10-K Annual Report FY 2024	2025-02-12	English
8-K Regulatory Filings	2025-02-12	English
PRIMARY DOCUMENT Director's Dealing	2025-02-11	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-10	English
PRIMARY DOCUMENT Director's Dealing	2025-02-03	English
8-K Regulatory Filings	2025-01-15	English
Major Shareholding Notification 2025 Major Shareholding Notification	2025-01-10	English
PRIMARY DOCUMENT Director's Dealing	2025-01-07	English

Filings by year

2026 31 filings
2025 71 filings
2024 87 filings
2023 94 filings
2022 79 filings
2021 83 filings
2020 65 filings
2019 69 filings
2018 72 filings
2017 78 filings
2016 101 filings
2015 109 filings
2014 102 filings
2013 108 filings
2012 104 filings
2011 116 filings
2010 101 filings