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 1-25 of 1,000 matching filings.

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1
4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

PRIMARY DOCUMENT

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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8-K File 000-19311

CURRENT REPORT

Filing date
10 Jun 2026
Reporting date
09 Jun 2026
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8-K/A File 000-19311

CURRENT REPORT

Filing date
10 Jun 2026
Reporting date
14 May 2026
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SCHEDULE 13G/A File 005-42028

SCHEDULE 13G/A filing

Filing date
05 Jun 2026
Reporting date
Not listed
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
14 May 2026
Reporting date
Not listed
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SC TO-T/A

SC TO-T/A

Filing date
14 May 2026
Reporting date
Not listed
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SC TO-T/A

AMENDMENT NO. 2

Filing date
12 May 2026
Reporting date
Not listed
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SC TO-T/A

AMENDMENT NO. 1

Filing date
06 May 2026
Reporting date
Not listed
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SCHEDULE 13G/A File 005-42028

SCHEDULE 13G/A filing

Filing date
06 May 2026
Reporting date
Not listed
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4

PRIMARY DOCUMENT

Filing date
05 May 2026
Reporting date
01 May 2026
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SCHEDULE 13G File 005-42028

SCHEDULE 13G filing

Filing date
29 Apr 2026
Reporting date
Not listed
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ARS File 000-19311

ARS

Filing date
28 Apr 2026
Reporting date
31 Dec 2025
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DEFA14A File 000-19311

DEFA14A

Filing date
28 Apr 2026
Reporting date
Not listed
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