Ciena Corp SEC filings CIEN
Ciena Corp has 1,000 filings in SEC EDGAR's recent list, going back to Feb 8, 2021. Its latest annual report, Form ARS, was filed on Feb 12, 2026 for the period ended Nov 1, 2025. The latest quarterly report (Form 10-Q) was filed on Sep 3, 2026, covering the quarter ended Aug 1, 2026. The most recent current report (Form 8-K) was filed on Sep 3, 2026 (results of operations). The company's fiscal year ends on October 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | May 28, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2023 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2021 | — |
Showing 6 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Telephone & Telegraph Apparatus (SIC 3661)
- Listed as
- CIEN (NYSE)
- Fiscal year ends
- October 31
- Incorporated in
- MD
- Headquarters
- Hanover, MD
- SEC filer status
- Large accelerated filer
- SEC CIK
- 936395
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.