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BIOGEN INC. — 10-K Filings

27 10-K filings on record

This page lists all 10-K filings submitted to the SEC by BIOGEN INC. (BIIB), sorted by most recent first. Each row links to the full filing on EdgarLookup. BIOGEN INC. has filed 27 10-K documents with the SEC since 2014. To view all SEC filings by BIOGEN INC., see the full filings list.

Overview All Filings Financials Insiders
All 10-C 10-K 10-K/A 10-K405 10-K405/A 10-Q 10-Q/A 11-K 144 3 3/A 4 4/A 424B2 424B3 424B4 425 5 8-A12B 8-A12G/A 8-B12G 8-K 8-K/A ARS CORRESP CT ORDER DEF 14A DEFA14A DEFC14A DEFR14A DFAN14A DFRN14A EFFECT FWP NO ACT NT 10-K NT 10-Q POS AM POS EX PRE 14A PREC14A PRER14A PRES14A PRRN14A PX14A6G RW S-3 S-3/A S-3ASR S-3MEF S-4 S-4/A S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SC TO-C SC TO-I SC TO-I/A SC TO-T SC TO-T/A SCHEDULE 13D SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A UPLOAD
Form Description Accession Number Filed Period
10-K 10-K 0000875045-26-000013 Feb 6, 2026 Dec 31, 2025
10-K 10-K 0000875045-25-000009 Feb 12, 2025 Dec 31, 2024
10-K 10-K 0000875045-24-000009 Feb 14, 2024 Dec 31, 2023
10-K 10-K 0000875045-23-000009 Feb 15, 2023 Dec 31, 2022
10-K 10-K 0000875045-22-000007 Feb 3, 2022 Dec 31, 2021
10-K 10-K 0000875045-21-000010 Feb 3, 2021 Dec 31, 2020
10-K 10-K 0000875045-20-000005 Feb 6, 2020 Dec 31, 2019
10-K 10-K 0000875045-19-000006 Feb 6, 2019 Dec 31, 2018
10-K 10-K 0000875045-18-000005 Feb 1, 2018 Dec 31, 2017
10-K 10-K 0000875045-17-000009 Feb 2, 2017 Dec 31, 2016
10-K 10-K 0000875045-16-000042 Feb 3, 2016 Dec 31, 2015
10-K 10-K 0000875045-15-000005 Feb 4, 2015 Dec 31, 2014
10-K 10-K 0000875045-14-000004 Feb 6, 2014 Dec 31, 2013
10-K 10-K 0000875045-13-000006 Feb 5, 2013 Dec 31, 2012
10-K 10-K 0001193125-12-039072 Feb 3, 2012 Dec 31, 2011
10-K FORM 10-K 0000950123-11-009300 Feb 4, 2011 Dec 31, 2010
10-K BIOGEN IDEC INC. 0000950123-10-010528 Feb 9, 2010 Dec 31, 2009
10-K BIOGEN IDEC INC. 0000950135-09-000730 Feb 6, 2009 Dec 31, 2008
10-K BIOGEN IDEC, INC. 0000950135-08-001029 Feb 14, 2008 Dec 31, 2007
10-K BIOGEN IDEC INC. 0000950135-07-000981 Feb 21, 2007 Dec 31, 2006
10-K BIOGEN IDEC INC. FORM 10-K 0000950135-06-001384 Mar 3, 2006 Dec 31, 2005
10-K BIOGEN IDEC INC. FORM 10-K 0000950135-05-001792 Mar 31, 2005 Dec 31, 2004
10-K BIOGEN IDEC, INC. 0000950135-04-001180 Mar 10, 2004 Dec 31, 2003
10-K FORM 10-K 0001047469-03-011017 Mar 31, 2003 Dec 31, 2002
10-K 10-K 0000912057-02-012961 Apr 1, 2002 Dec 31, 2001
10-K 10-K 0000912057-01-506405 Apr 2, 2001 Dec 31, 2000
10-K FORM 10-K YEAR ENDED DECEMBER 31, 1999 0000936392-00-000180 Mar 30, 2000 Dec 31, 1999