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Ciena Corp SEC Filings
What Ciena Corp has told the SEC happened, by the 8-K items and forms it filed under: when it reported results, who joined or left, what it bought or sold, and whether its auditor or its accounts ever changed.
CIEN overview →Filings on file
120
since Nov 4, 2016
Warning signs
0
none filed
Last results
Sep 3, 2026
8-K item 2.02
Industry
Telephone & Telegraph Apparatus
SIC 3661
Newest first
Each label is a form type or an 8-K item as filed; each row links to the filing.
| Filed | What it reports | Document |
|---|---|---|
| Sep 3, 2026 | Quarterly report 10-Q | Read ↗ |
| Sep 3, 2026 | Results announced 8-K | Read ↗ |
| Jun 11, 2026 | Material agreementNew debtUnregistered share sale 8-K | Read ↗ |
| Jun 4, 2026 | Quarterly report 10-Q | Read ↗ |
| Jun 4, 2026 | Results announced 8-K | Read ↗ |
| Mar 31, 2026 | Shareholder vote 8-K | Read ↗ |
| Mar 5, 2026 | Quarterly report 10-Q | Read ↗ |
| Mar 5, 2026 | Results announced 8-K | Read ↗ |
| Dec 12, 2025 | Annual report 10-K | Read ↗ |
| Dec 11, 2025 | Results announced 8-K | Read ↗ |
| Dec 4, 2025 | Executive or director change 8-K | Read ↗ |
| Sep 4, 2025 | Quarterly report 10-Q | Read ↗ |
| Sep 4, 2025 | Results announced 8-K | Read ↗ |
| Jun 18, 2025 | Executive or director change 8-K | Read ↗ |
| Jun 5, 2025 | Quarterly report 10-Q | Read ↗ |
| Jun 5, 2025 | Results announced 8-K | Read ↗ |
| Apr 1, 2025 | Shareholder vote 8-K | Read ↗ |
| Mar 12, 2025 | Quarterly report 10-Q | Read ↗ |
| Mar 11, 2025 | Results announced 8-K | Read ↗ |
| Jan 21, 2025 | Material agreementNew debt 8-K | Read ↗ |
| Dec 20, 2024 | Annual report 10-K | Read ↗ |
| Dec 12, 2024 | Executive or director changeResults announced 8-K | Read ↗ |
| Sep 4, 2024 | Quarterly report 10-Q | Read ↗ |
| Sep 4, 2024 | Executive or director changeResults announced 8-K | Read ↗ |
| Jun 6, 2024 | Quarterly report 10-Q | Read ↗ |
| Jun 6, 2024 | Results announced 8-K | Read ↗ |
| Apr 23, 2024 | Executive or director change 8-K | Read ↗ |
| Mar 26, 2024 | Executive or director changeChange in control 8-K | Read ↗ |
| Mar 7, 2024 | Quarterly report 10-Q | Read ↗ |
| Mar 7, 2024 | Results announced 8-K | Read ↗ |
| Dec 15, 2023 | Annual report 10-K | Read ↗ |
| Dec 7, 2023 | Results announced 8-K | Read ↗ |
| Oct 25, 2023 | Material agreementNew debt 8-K | Read ↗ |
| Oct 3, 2023 | Executive or director change 8-K | Read ↗ |
| Sep 6, 2023 | Quarterly report 10-Q | Read ↗ |
| Aug 31, 2023 | Executive or director changeResults announced 8-K | Read ↗ |
| Jun 7, 2023 | Quarterly report 10-Q | Read ↗ |
| Jun 6, 2023 | Results announced 8-K | Read ↗ |
| Apr 3, 2023 | Shareholder vote 8-K | Read ↗ |
| Mar 8, 2023 | Quarterly report 10-Q | Read ↗ |
| Mar 6, 2023 | Results announced 8-K | Read ↗ |
| Feb 15, 2023 | Material agreement 8-K | Read ↗ |
| Jan 24, 2023 | Executive or director change 8-K | Read ↗ |
| Jan 23, 2023 | Material agreementNew debt 8-K | Read ↗ |
| Dec 16, 2022 | Annual report 10-K | Read ↗ |
| Dec 8, 2022 | Results announced 8-K | Read ↗ |
| Sep 7, 2022 | Quarterly report 10-Q | Read ↗ |
| Sep 1, 2022 | Results announced 8-K | Read ↗ |
| Jun 8, 2022 | Quarterly report 10-Q | Read ↗ |
| Jun 2, 2022 | Results announced 8-K | Read ↗ |
| Apr 20, 2022 | Shareholder vote 8-K | Read ↗ |
| Mar 9, 2022 | Quarterly report 10-Q | Read ↗ |
| Mar 7, 2022 | Results announced 8-K | Read ↗ |
| Feb 15, 2022 | Results announced 8-K | Read ↗ |
| Jan 18, 2022 | Material agreementNew debt 8-K | Read ↗ |
| Dec 17, 2021 | Annual report 10-K | Read ↗ |
| Dec 14, 2021 | Material agreement 8-K | Read ↗ |
| Dec 9, 2021 | Results announced 8-K | Read ↗ |
| Sep 8, 2021 | Quarterly report 10-Q | Read ↗ |
| Sep 2, 2021 | Results announced 8-K | Read ↗ |
| Jun 9, 2021 | Quarterly report 10-Q | Read ↗ |
| Jun 3, 2021 | Results announced 8-K | Read ↗ |
| Apr 6, 2021 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Mar 10, 2021 | Quarterly report 10-Q | Read ↗ |
| Mar 4, 2021 | Results announced 8-K | Read ↗ |
| Dec 18, 2020 | Annual report 10-K | Read ↗ |
| Dec 10, 2020 | Results announced 8-K | Read ↗ |
| Sep 9, 2020 | Quarterly report 10-Q | Read ↗ |
| Sep 3, 2020 | Results announced 8-K | Read ↗ |
| Jul 1, 2020 | Executive or director change 8-K | Read ↗ |
| Jun 10, 2020 | Quarterly report 10-Q | Read ↗ |
| Jun 4, 2020 | Results announced 8-K | Read ↗ |
| Apr 6, 2020 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Mar 11, 2020 | Quarterly report 10-Q | Read ↗ |
| Mar 5, 2020 | Results announced 8-K | Read ↗ |
| Jan 28, 2020 | Material agreementNew debt 8-K | Read ↗ |
| Dec 20, 2019 | Annual report 10-K | Read ↗ |
| Dec 12, 2019 | Results announced 8-K | Read ↗ |
| Oct 31, 2019 | Material agreementNew debt 8-K | Read ↗ |
| Sep 11, 2019 | Quarterly report 10-Q | Read ↗ |
| Sep 5, 2019 | Results announced 8-K | Read ↗ |
| Aug 29, 2019 | Executive or director change 8-K | Read ↗ |
| Jun 12, 2019 | Quarterly report 10-Q | Read ↗ |
| Jun 6, 2019 | Results announced 8-K | Read ↗ |
| Apr 1, 2019 | Shareholder vote 8-K | Read ↗ |
| Mar 11, 2019 | Quarterly report 10-Q | Read ↗ |
| Mar 5, 2019 | Results announced 8-K | Read ↗ |
| Dec 21, 2018 | Annual report 10-K | Read ↗ |
| Dec 13, 2018 | Results announced 8-K | Read ↗ |
| Oct 18, 2018 | Executive or director change 8-K | Read ↗ |
| Oct 1, 2018 | Material agreementNew debt 8-K | Read ↗ |
| Sep 5, 2018 | Quarterly report 10-Q | Read ↗ |
| Aug 30, 2018 | Results announced 8-K | Read ↗ |
| Jun 13, 2018 | Executive or director change 8-K | Read ↗ |
| Jun 6, 2018 | Quarterly report 10-Q | Read ↗ |
| May 31, 2018 | Results announced 8-K | Read ↗ |
| Apr 5, 2018 | Shareholder vote 8-K | Read ↗ |
| Mar 7, 2018 | Quarterly report 10-Q | Read ↗ |
| Mar 6, 2018 | Results announced 8-K | Read ↗ |
| Jan 16, 2018 | Shareholder vote 8-K/A | Read ↗ |
| Dec 22, 2017 | Annual report 10-K | Read ↗ |
| Dec 7, 2017 | Results announced 8-K | Read ↗ |
| Oct 30, 2017 | Executive or director change 8-K/A | Read ↗ |
| Sep 7, 2017 | Quarterly report 10-Q | Read ↗ |
| Aug 31, 2017 | Results announced 8-K | Read ↗ |
| Aug 24, 2017 | Executive or director change 8-K | Read ↗ |
| Aug 2, 2017 | Material agreement 8-K | Read ↗ |
| Jun 30, 2017 | Tender offer SC TO-I | Read ↗ |
| Jun 29, 2017 | Merger vote or registration S-4 | Read ↗ |
| Jun 7, 2017 | Quarterly report 10-Q | Read ↗ |
| Jun 1, 2017 | Results announced 8-K | Read ↗ |
| Mar 29, 2017 | Executive or director change 8-K | Read ↗ |
| Mar 27, 2017 | Shareholder vote 8-K | Read ↗ |
| Mar 8, 2017 | Quarterly report 10-Q | Read ↗ |
| Mar 8, 2017 | Results announced 8-K | Read ↗ |
| Feb 1, 2017 | Material agreementNew debt 8-K | Read ↗ |
| Jan 24, 2017 | Executive or director change 8-K | Read ↗ |
| Dec 21, 2016 | Annual report 10-K | Read ↗ |
| Dec 8, 2016 | Results announced 8-K | Read ↗ |
| Nov 4, 2016 | Executive or director change 8-K | Read ↗ |
Source: Ciena Corp's EDGAR filing history, the last ten years. The labels are the form types and 8-K item numbers the company filed under, not a reading of what it wrote — an item 5.02 can be a chief executive fired or a director retiring on schedule — so each row links to the filing.
More on CIEN
Company overviewEverything on CIEN in one place, with the price.Insider tradingWhat CIEN's own officers and directors buy and sell.Planned salesSales CIEN insiders have filed notice of.Who owns itEvery manager reporting a position in CIEN.Funds holding itWhich funds and ETFs hold CIEN, and how big a bet.LobbyingWhat CIEN spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on CIEN's account, and who they worked for.Federal contractsWhat federal agencies pay CIEN.PatentsWhat CIEN is filing at the patent office.