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Biogen Inc. SEC filings

In the twelve months since 22 September 2025 Biogen Inc. filed 21 documents with the SEC of the kinds listed here: 14 current reports (8-K), about 8 results of operations; 2 material agreement; 2 other events; 2 officer or director change; 1 shareholder vote; 3 quarterly reports (10-Q), 1 annual report to shareholders (ARS), 1 additional proxy material (DEFA14A), 1 proxy statement (DEF 14A), 1 annual report (10-K). The latest, filed 29 July 2026: 10-Q, quarterly report.

FiledFormWhat it was aboutPeriod or event dateFiling
29 July 202610-Qquarterly report30 June 2026EDGAR
29 July 20268-KResults of operations29 July 2026EDGAR
1 July 20268-KResults of operations1 July 2026EDGAR
10 June 20268-KShareholder vote9 June 2026EDGAR
10 June 20268-K/Aamended current report14 May 2026EDGAR
14 May 20268-KMaterial agreement, Acquisition or disposition completed, New financial obligation, Regulation FD disclosure14 May 2026EDGAR
29 April 202610-Qquarterly report31 March 2026EDGAR
29 April 20268-KResults of operations29 April 2026EDGAR
28 April 2026ARSannual report to shareholders31 December 2025EDGAR
28 April 2026DEFA14Aadditional proxy materialEDGAR
28 April 2026DEF 14Aproxy statement9 June 2026EDGAR
6 April 20268-KResults of operations6 April 2026EDGAR
31 March 20268-KMaterial agreement, Other events31 March 2026EDGAR
11 March 20268-KOfficer or director change11 March 2026EDGAR
11 February 20268-KOfficer or director change, Other events11 February 2026EDGAR
6 February 202610-Kannual report31 December 2025EDGAR
6 February 20268-KResults of operations6 February 2026EDGAR
14 January 20268-KResults of operations13 January 2026EDGAR
30 October 202510-Qquarterly report30 September 2025EDGAR
30 October 20258-KResults of operations30 October 2025EDGAR
14 October 20258-KResults of operations14 October 2025EDGAR

An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened. Form 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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