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Ciena Corp. SEC filings

In the twelve months since 22 September 2025 Ciena Corp. filed 18 documents with the SEC of the kinds listed here: 10 current reports (8-K), about 4 results of operations; 4 other events; 1 material agreement; 1 new financial obligation; 1 unregistered sale of equity; 3 quarterly reports (10-Q), 1 conflict minerals report (SD), 1 annual report to shareholders (ARS), 1 additional proxy material (DEFA14A), 1 proxy statement (DEF 14A), 1 annual report (10-K). The latest, filed 3 September 2026: 10-Q, quarterly report.

FiledFormWhat it was aboutPeriod or event dateFiling
3 September 202610-Qquarterly report1 August 2026EDGAR
3 September 20268-KResults of operations3 September 2026EDGAR
11 June 20268-KMaterial agreement, New financial obligation, Unregistered sale of equity, Other events8 June 2026EDGAR
8 June 20268-KOther events8 June 2026EDGAR
4 June 202610-Qquarterly report2 May 2026EDGAR
4 June 20268-KResults of operations4 June 2026EDGAR
28 May 2026SDconflict minerals reportEDGAR
31 March 20268-KShareholder vote26 March 2026EDGAR
5 March 202610-Qquarterly report31 January 2026EDGAR
5 March 20268-KResults of operations5 March 2026EDGAR
12 February 2026ARSannual report to shareholders1 November 2025EDGAR
12 February 2026DEFA14Aadditional proxy materialEDGAR
12 February 2026DEF 14Aproxy statement26 March 2026EDGAR
12 December 202510-Kannual report1 November 2025EDGAR
11 December 20258-KResults of operations11 December 2025EDGAR
4 December 20258-KOfficer or director change30 November 2025EDGAR
7 October 20258-KOther events7 October 2025EDGAR
22 September 20258-KOther events22 September 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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