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BIOGEN INC.

DEFA14A 86 filings

All DEFA14A Filings

Complete history of DEFA14A filings with the SEC

Date Filed	View on EDGAR
28 Apr Apr 28, 2026	open_in_new View Filing
28 Apr Apr 28, 2026	open_in_new View Filing
02 Jun Jun 02, 2025	open_in_new View Filing
28 Apr Apr 28, 2025	open_in_new View Filing
26 Apr Apr 26, 2024	open_in_new View Filing
31 Jul Jul 31, 2023	open_in_new View Filing
28 Jul Jul 28, 2023	open_in_new View Filing
13 Jun Jun 13, 2023	open_in_new View Filing
12 Jun Jun 12, 2023	open_in_new View Filing
28 Apr Apr 28, 2023	open_in_new View Filing
07 Jun Jun 07, 2022	open_in_new View Filing
29 Apr Apr 29, 2022	open_in_new View Filing
23 Apr Apr 23, 2021	open_in_new View Filing
09 Apr Apr 09, 2021	open_in_new View Filing
20 Apr Apr 20, 2020	open_in_new View Filing
24 May May 24, 2019	open_in_new View Filing
30 Apr Apr 30, 2019	open_in_new View Filing
29 Apr Apr 29, 2019	open_in_new View Filing
27 Apr Apr 27, 2018	open_in_new View Filing
26 Apr Apr 26, 2017	open_in_new View Filing
15 Apr Apr 15, 2016	open_in_new View Filing
30 Apr Apr 30, 2015	open_in_new View Filing
30 Apr Apr 30, 2014	open_in_new View Filing
30 Apr Apr 30, 2013	open_in_new View Filing
27 Apr Apr 27, 2012	open_in_new View Filing
21 Apr Apr 21, 2011	open_in_new View Filing
10 Mar Mar 10, 2010	open_in_new View Filing
10 Mar Mar 10, 2010	open_in_new View Filing
17 Feb Feb 17, 2010	open_in_new View Filing
09 Feb Feb 09, 2010	open_in_new View Filing
28 Jan Jan 28, 2010	open_in_new View Filing
29 May May 29, 2009	open_in_new View Filing
27 May May 27, 2009	open_in_new View Filing
27 May May 27, 2009	open_in_new View Filing
26 May May 26, 2009	open_in_new View Filing
26 May May 26, 2009	open_in_new View Filing
19 May May 19, 2009	open_in_new View Filing
15 May May 15, 2009	open_in_new View Filing
15 May May 15, 2009	open_in_new View Filing
15 May May 15, 2009	open_in_new View Filing
14 May May 14, 2009	open_in_new View Filing
06 May May 06, 2009	open_in_new View Filing
29 Apr Apr 29, 2009	open_in_new View Filing
27 Apr Apr 27, 2009	open_in_new View Filing
17 Apr Apr 17, 2009	open_in_new View Filing
16 Apr Apr 16, 2009	open_in_new View Filing
16 Apr Apr 16, 2009	open_in_new View Filing
26 Mar Mar 26, 2009	open_in_new View Filing
25 Mar Mar 25, 2009	open_in_new View Filing
25 Mar Mar 25, 2009	open_in_new View Filing
18 Mar Mar 18, 2009	open_in_new View Filing
17 Mar Mar 17, 2009	open_in_new View Filing
17 Mar Mar 17, 2009	open_in_new View Filing
12 Mar Mar 12, 2009	open_in_new View Filing
09 Feb Feb 09, 2009	open_in_new View Filing
06 Feb Feb 06, 2009	open_in_new View Filing
06 Feb Feb 06, 2009	open_in_new View Filing
06 Feb Feb 06, 2009	open_in_new View Filing
06 Feb Feb 06, 2009	open_in_new View Filing
13 Jun Jun 13, 2008	open_in_new View Filing
12 Jun Jun 12, 2008	open_in_new View Filing
11 Jun Jun 11, 2008	open_in_new View Filing
10 Jun Jun 10, 2008	open_in_new View Filing
09 Jun Jun 09, 2008	open_in_new View Filing
03 Jun Jun 03, 2008	open_in_new View Filing
30 May May 30, 2008	open_in_new View Filing
29 May May 29, 2008	open_in_new View Filing
23 May May 23, 2008	open_in_new View Filing
15 May May 15, 2008	open_in_new View Filing
13 May May 13, 2008	open_in_new View Filing
08 May May 08, 2008	open_in_new View Filing
24 Apr Apr 24, 2008	open_in_new View Filing
23 Apr Apr 23, 2008	open_in_new View Filing
23 Apr Apr 23, 2008	open_in_new View Filing
17 Apr Apr 17, 2008	open_in_new View Filing
15 Apr Apr 15, 2008	open_in_new View Filing
20 Mar Mar 20, 2008	open_in_new View Filing
18 Mar Mar 18, 2008	open_in_new View Filing
26 Feb Feb 26, 2008	open_in_new View Filing
08 Feb Feb 08, 2008	open_in_new View Filing
07 Feb Feb 07, 2008	open_in_new View Filing
06 Feb Feb 06, 2008	open_in_new View Filing
06 Feb Feb 06, 2008	open_in_new View Filing
06 Feb Feb 06, 2008	open_in_new View Filing
31 Jan Jan 31, 2008	open_in_new View Filing
28 Jan Jan 28, 2008	open_in_new View Filing