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 |
|---|---|---|---|
| 4 | Insider transaction | Nov 4, 2026 | Nov 2, 2026 |
| 4 | Insider transaction | Nov 3, 2026 | Nov 1, 2026 |
| 4 | Insider transaction | Oct 19, 2026 | Oct 15, 2026 |
| 4 | Insider transaction | Oct 19, 2026 | Oct 15, 2026 |
| 4 | Insider transaction | Oct 19, 2026 | Oct 15, 2026 |
| 4 | Insider transaction | Oct 19, 2026 | Oct 15, 2026 |
| 144 | Notice of proposed sale | Oct 15, 2026 | — |
| 144 | Notice of proposed sale | Oct 15, 2026 | — |
| 144 | Notice of proposed sale | Oct 15, 2026 | — |
| 144 | Notice of proposed sale | Oct 15, 2026 | — |
| 4 | Insider transaction | Oct 13, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 6, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 6, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 6, 2026 | Oct 1, 2026 |
| 144 | Notice of proposed sale | Oct 1, 2026 | — |
| 144 | Notice of proposed sale | Oct 1, 2026 | — |
| 144 | Notice of proposed sale | Oct 1, 2026 | — |
| 4 | Insider transaction | Sep 29, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 24, 2026 |
| 144 | Notice of proposed sale | Sep 25, 2026 | — |
| 4 | Insider transaction | Sep 25, 2026 | Sep 23, 2026 |
| 144 | Notice of proposed sale | Sep 23, 2026 | — |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 20, 2026 |
| 4 | Insider transaction | Sep 17, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 17, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 17, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 17, 2026 | Sep 15, 2026 |
| 144 | Notice of proposed sale | Sep 16, 2026 | — |
| 144 | Notice of proposed sale | Sep 15, 2026 | — |
| 144 | Notice of proposed sale | Sep 15, 2026 | — |
| 144 | Notice of proposed sale | Sep 15, 2026 | — |
| 10-Q | Quarterly report | Sep 3, 2026 | Aug 1, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Sep 3, 2026 | — |
| 8-K |
Current report
Results of operations
|
Sep 3, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Sep 1, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 17, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 17, 2026 |
| 144 | Notice of proposed sale | Aug 17, 2026 | — |
| 144 | Notice of proposed sale | Aug 14, 2026 | — |
| 144 | Notice of proposed sale | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2026 | — |
| 4 | Insider transaction | Aug 4, 2026 | Aug 1, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Aug 3, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 26, 2026 | Jun 24, 2026 |
| 144 | Notice of proposed sale | Jun 26, 2026 | — |
| 144 | Notice of proposed sale | Jun 24, 2026 | — |
| 4 | Insider transaction | Jun 23, 2026 | Jun 22, 2026 |
| 3 | Initial insider ownership | Jun 23, 2026 | Jun 22, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 20, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale, Other events
|
Jun 11, 2026 | Jun 8, 2026 |
| 8-K |
Current report
Other events
|
Jun 8, 2026 | Jun 8, 2026 |
| 10-Q | Quarterly report | Jun 4, 2026 | May 2, 2026 |
| 8-K |
Current report
Results of operations
|
Jun 4, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | Jun 1, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 28, 2026 | — |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | May 15, 2026 | — |
| 144 | Notice of proposed sale | May 15, 2026 | — |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 24, 2026 | — |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 16, 2026 | Apr 15, 2026 |
| 144 | Notice of proposed sale | Apr 15, 2026 | — |
| 144 | Notice of proposed sale | Apr 15, 2026 | — |
| 144 | Notice of proposed sale | Apr 15, 2026 | — |
| 144 | Notice of proposed sale | Apr 15, 2026 | — |
| 4 | Insider transaction | Apr 3, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 3, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 3, 2026 | Apr 1, 2026 |
| 144 | Notice of proposed sale | Apr 1, 2026 | — |
| 144 | Notice of proposed sale | Apr 1, 2026 | — |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Mar 31, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| 144 | Notice of proposed sale | Mar 27, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 25, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 144 | Notice of proposed sale | Mar 24, 2026 | — |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 144 | Notice of proposed sale | Mar 16, 2026 | — |
| 10-Q | Quarterly report | Mar 5, 2026 | Jan 31, 2026 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Feb 19, 2026 | Feb 17, 2026 |
| 4 | Insider transaction | Feb 19, 2026 | Feb 17, 2026 |
| 144 | Notice of proposed sale | Feb 17, 2026 | — |
| ARS | Annual report to shareholders | Feb 12, 2026 | Nov 1, 2025 |
| DEFA14A | Additional proxy material | Feb 12, 2026 | — |
| DEF 14A | Proxy statement | Feb 12, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 21, 2026 | — |
| 4 | Insider transaction | Jan 20, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 20, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 20, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 144 | Notice of proposed sale | Jan 15, 2026 | — |
| 144 | Notice of proposed sale | Jan 15, 2026 | — |
| 144 | Notice of proposed sale | Jan 15, 2026 | — |
| 4 | Insider transaction | Jan 13, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 13, 2026 | Jan 12, 2026 |
| 4 | Insider transaction | Jan 13, 2026 | Jan 12, 2026 |
| 144 | Notice of proposed sale | Jan 12, 2026 | — |
| 144 | Notice of proposed sale | Jan 12, 2026 | — |
| 144 | Notice of proposed sale | Jan 9, 2026 | — |
| 4 | Insider transaction | Jan 6, 2026 | Jan 5, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 144 | Notice of proposed sale | Jan 5, 2026 | — |
| 144 | Notice of proposed sale | Jan 2, 2026 | — |
| 4 | Insider transaction | Dec 29, 2025 | Dec 22, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 20, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Dec 17, 2025 | Dec 15, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 15, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 15, 2025 |
| 144 | Notice of proposed sale | Dec 15, 2025 | — |
| 144 | Notice of proposed sale | Dec 15, 2025 | — |
| 144 | Notice of proposed sale | Dec 15, 2025 | — |
| 10-K | Annual report | Dec 12, 2025 | Nov 1, 2025 |
| 8-K |
Current report
Results of operations
|
Dec 11, 2025 | Dec 11, 2025 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 3, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 4, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Dec 4, 2025 | Nov 30, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 17, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 17, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 17, 2025 |
| 144 | Notice of proposed sale | Nov 17, 2025 | — |
Showing 200 filings, the most recent 200. 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.