Financial reports
ARS
2023 FY
Annual report to shareholders
26 Apr 24
10-Q
2024 Q1
Quarterly report
24 Apr 24
10-K
2023 FY
Annual report
13 Feb 24
10-Q
2023 Q3
Quarterly report
8 Nov 23
10-Q
2023 Q2
Quarterly report
25 Jul 23
ARS
2023 FY
Annual report to shareholders
28 Apr 23
10-Q
2023 Q1
Quarterly report
25 Apr 23
10-K
2022 FY
Annual report
15 Feb 23
10-Q
2022 Q3
Quarterly report
25 Oct 22
10-Q
2022 Q1
Quarterly report
20 Jul 22
Current reports
8-K
First quarter revenue $2.3 billion; GAAP diluted EPS $2.70; Non-GAAP diluted EPS $3.67
24 Apr 24
8-K
Biogen reports fourth quarter and full year 2023 results and expects return to Non-GAAP EPS growth in 2024
13 Feb 24
8-K
Amendments to Articles of Incorporation or Bylaws
12 Dec 23
8-K
Departure of Directors or Certain Officers
8 Nov 23
8-K
Biogen reports third quarter 2023 results and updates full year 2023 guidance
8 Nov 23
8-K/A
Submission of Matters to a Vote of Security Holders
28 Sep 23
8-K
Biogen Completes Acquisition of Reata Pharmaceuticals
26 Sep 23
8-K
Entry into a Material Definitive Agreement
1 Sep 23
8-K
Entry into a Material Definitive Agreement
31 Jul 23
8-K
Other Events
28 Jul 23
Registration and prospectus
POS AM
Prospectus update (post-effective amendment)
6 Jul 22
424B3
Prospectus supplement
26 May 22
S-4
Registration of securities issued in business combination transactions
17 May 22
424B2
Prospectus for primary offering
28 Apr 20
FWP
Free writing prospectus
28 Apr 20
424B2
Prospectus for primary offering
27 Apr 20
S-3ASR
Automatic shelf registration
24 Apr 20
S-8
Registration of securities for employees
16 Jun 17
FWP
Free writing prospectus
11 Sep 15
424B2
Prospectus for primary offering
11 Sep 15
Proxies
DEFA14A
Additional proxy soliciting materials
26 Apr 24
DEF 14A
Definitive proxy
26 Apr 24
PRE 14A
Preliminary proxy
12 Apr 24
DEFA14A
Additional proxy soliciting materials
31 Jul 23
DEFA14A
Additional proxy soliciting materials
28 Jul 23
DEFA14A
Additional proxy soliciting materials
13 Jun 23
DEFR14A
Revised proxy
13 Jun 23
DEFA14A
Additional proxy soliciting materials
12 Jun 23
DEFA14A
Additional proxy soliciting materials
28 Apr 23
DEF 14A
Definitive proxy
28 Apr 23
Other
EFFECT
Notice of effectiveness
13 Jul 22
EFFECT
Notice of effectiveness
27 May 22
CORRESP
Correspondence with SEC
24 May 22
UPLOAD
Letter from SEC
23 May 22
UPLOAD
Letter from SEC
22 Jun 21
CORRESP
Correspondence with SEC
21 Jun 21
UPLOAD
Letter from SEC
17 Jun 21
CORRESP
Correspondence with SEC
9 Jun 21
UPLOAD
Letter from SEC
13 May 21
CORRESP
Correspondence with SEC
7 Apr 21
Ownership
4
Priya Singhal
3 Apr 24
4
Nicole Murphy
3 Apr 24
144
Notice of proposed sale of securities
2 Apr 24
4
Priya Singhal
26 Feb 24
144
Notice of proposed sale of securities
22 Feb 24
4
SUSAN H ALEXANDER
21 Feb 24
4
Ginger Gregory
21 Feb 24
4
Rachid Izzar
21 Feb 24
4
Robin Kramer
21 Feb 24
4
MICHAEL R MCDONNELL
21 Feb 24