BIOGEN INC. — SC 13D/A Filings
19 SC 13D/A filings on record
This page lists all SC 13D/A 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 19 SC 13D/A documents with the SEC since 2014. To view all SEC filings by BIOGEN INC., see the full filings list.
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 |
|---|---|---|---|---|
| SC 13D/A | SC 13D/A | 0001193125-23-245726 | Sep 28, 2023 | — |
| SC 13D/A | — | 0000928475-11-000133 | Jun 22, 2011 | — |
| SC 13D/A | — | 0000928475-11-000107 | May 23, 2011 | — |
| SC 13D/A | AMENDMENT NUMBER 3 | 0000910627-10-000052 | Mar 22, 2010 | — |
| SC 13D/A | AMENDMENT NO. 2 | 0000910627-10-000023 | Jan 28, 2010 | — |
| SC 13D/A | — | 0000928475-09-000054 | Feb 6, 2009 | — |
| SC 13D/A | BIOGEN IDEC, INC. | 0000950135-08-003530 | May 8, 2008 | — |
| SC 13D/A | BIOGEN IDEC INC. | 0000950135-06-006820 | Nov 9, 2006 | — |
| SC 13D/A | BIOGEN IDEC INC. | 0000950135-05-005256 | Sep 7, 2005 | — |
| SC 13D/A | WILLIAMS ACT FILING SC 13D/A | 0000950149-01-000312 | Feb 14, 2001 | — |
| SC 13D/A | SCDEDULE 13D | 0000950149-00-001545 | Jul 19, 2000 | — |
| SC 13D/A | AMENDMENT NO. 5 ON SCHEDULE 13D | 0000950149-00-000558 | Mar 21, 2000 | — |
| SC 13D/A | GENERAL STATEMENT OF BENEFICIAL OWNERSHIP | 0000950149-98-000220 | Feb 13, 1998 | — |
| SC 13D/A | — | 0000919574-97-000641 | Jul 24, 1997 | — |
| SC 13D/A | — | 0000905148-97-000770 | May 7, 1997 | — |
| SC 13D/A | SCHEDULE 13D AMEND NO.4 IDEC PHARMACEUTICALS CORP | 0000893220-97-000564 | Mar 17, 1997 | — |
| SC 13D/A | AMEND #3 TO SCHEDULE 13D, SMITHKLINE BEECHAM CORP | 0000893220-97-000469 | Mar 3, 1997 | — |
| SC 13D/A | AMENDMENT NO. 2 TO SCHEDULE 13D | 0000893220-96-002028 | Dec 13, 1996 | — |
| SC 13D/A | AMENDMENT NO. 1 TO SCHEDULE 13D | 0000893220-96-001610 | Sep 26, 1996 | — |