BIOGEN INC. reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
Cambridge, MA
SEC filing record 1 source field available
Fiscal year end
31 December
BIOGEN INC. has filed 2,708 SEC EDGAR filings since 21 May 1996

SEC filing history

Showing 26-50 of 1,000 matching filings.

Per page
25
Current page
2
DEF 14A File 000-19311

DEF 14A

Filing date
28 Apr 2026
Reporting date
09 Jun 2026
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SC TO-C

SCHEDULE TO

Filing date
07 Apr 2026
Reporting date
Not listed
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3 File 001-38276

3 filing

Filing date
06 Apr 2026
Reporting date
31 Mar 2026
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SCHEDULE 13D

SCHEDULE 13D filing

Filing date
06 Apr 2026
Reporting date
Not listed
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SC TO-C

SCHEDULE TO

Filing date
03 Apr 2026
Reporting date
Not listed
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4

PRIMARY DOCUMENT

Filing date
03 Apr 2026
Reporting date
01 Apr 2026
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SC TO-C

SC TO-C

Filing date
31 Mar 2026
Reporting date
Not listed
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SC TO-C

SCHEDULE TO

Filing date
31 Mar 2026
Reporting date
Not listed
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SCHEDULE 13G/A File 005-42028

SCHEDULE 13G/A filing

Filing date
26 Mar 2026
Reporting date
Not listed
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8-K File 000-19311

CURRENT REPORT

Filing date
11 Mar 2026
Reporting date
11 Mar 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
12 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
17 Feb 2026
Reporting date
13 Feb 2026
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4

PRIMARY DOCUMENT

Filing date
10 Feb 2026
Reporting date
06 Feb 2026
SEC evidence
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