Ciena SEC Filings
NYSE: CIENUtilitiesTelecommunications EquipmentUSD
449.77+23.84 (+5.60%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Ciena filing overview
This page lists 60 recent SEC filings by Ciena (CIEN), including 40 4, 7 8-K, 5 SCHEDULE 13G/A, 3 10-Q. The latest annual report (10-K) was filed on Dec 12, 2025 for the period ending Nov 1, 2025. The most recent quarterly report (10-Q) was filed on Sep 3, 2026.
The latest current report (8-K), used to disclose material events such as earnings releases and executive changes, was filed on Sep 3, 2026. Form 10-K is the audited annual report, 10-Q the quarterly report, 8-K covers material events, and Form 4 reports insider transactions. All documents link directly to SEC EDGAR.
Summary generated from market data by MetaCap's automated system. Methodology
CIEN SEC filings
| Filed | Form | Description | Document |
|---|---|---|---|
| Oct 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 29, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 28, 2026 | 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | View on EDGAR |
| Sep 25, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 22, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 3, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Sep 3, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Sep 3, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Sep 2, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 18, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 18, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 18, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 18, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 6, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Aug 4, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 4, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jun 30, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jun 26, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jun 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jun 23, 2026 | 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | View on EDGAR |
| Jun 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jun 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jun 11, 2026 | 8-K | Entry into a Material Definitive Agreement; Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement; Unregistered Sales of Equity Securities; Other Events | View on EDGAR |
| Jun 8, 2026 | 8-K | Other Events | View on EDGAR |
| Jun 4, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Jun 4, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Apr 29, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 29, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 24, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Mar 31, 2026 | 8-K | Submission of Matters to a Vote of Security Holders | View on EDGAR |
| Mar 26, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Mar 5, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Mar 5, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Feb 12, 2026 | DEF 14A | Definitive proxy statement | View on EDGAR |
| Jan 21, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Dec 12, 2025 | 10-K | Annual report | View on EDGAR |
| Dec 11, 2025 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Dec 4, 2025 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |