CIENA CORP — 8-K Filings
262 8-K filings on record
This page lists all 8-K filings submitted to the SEC by CIENA CORP (CIEN), sorted by most recent first. Each row links to the full filing on EdgarLookup. CIENA CORP has filed 262 8-K documents with the SEC since 2020. To view all SEC filings by CIENA CORP, see the full filings list.
All
10-K
10-K/A
10-Q
10-Q/A
144
25
3
3/A
4
4/A
424B3
424B4
424B5
425
8-A12B
8-A12G
8-K
8-K/A
ARS
CERTNYS
CORRESP
CT ORDER
DEF 14A
DEFA14A
EFFECT
FWP
POS AM
POSASR
PRE 14A
PRER14A
REGDEX
REGDEX/A
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-3MEF
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-C
SC TO-I
SC TO-I/A
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 8-K | 8-K | 0001628280-26-015006 | Mar 5, 2026 | — |
| 8-K | 8-K | 0001628280-25-056425 | Dec 11, 2025 | — |
| 8-K | 8-K | 0001628280-25-055133 | Dec 4, 2025 | Nov 30, 2025 |
| 8-K | 8-K | 0001628280-25-044494 | Oct 7, 2025 | — |
| 8-K | 8-K | 0001628280-25-042266 | Sep 22, 2025 | — |
| 8-K | 8-K | 0000936395-25-000037 | Sep 4, 2025 | — |
| 8-K | 8-K | 0000936395-25-000029 | Jun 18, 2025 | — |
| 8-K | 8-K | 0000936395-25-000023 | Jun 5, 2025 | — |
| 8-K | 8-K | 0000936395-25-000015 | Apr 1, 2025 | Mar 27, 2025 |
| 8-K | 8-K | 0000936395-25-000005 | Mar 11, 2025 | — |
| 8-K | 8-K | 0001193125-25-009588 | Jan 21, 2025 | Jan 17, 2025 |
| 8-K | 8-K | 0000936395-24-000037 | Dec 12, 2024 | — |
| 8-K | 8-K | 0000936395-24-000035 | Oct 2, 2024 | — |
| 8-K | 8-K | 0000936395-24-000030 | Sep 4, 2024 | — |
| 8-K | 8-K | 0000936395-24-000022 | Jun 6, 2024 | — |
| 8-K | 8-K | 0000936395-24-000014 | Apr 23, 2024 | Apr 22, 2024 |
| 8-K | 8-K | 0000936395-24-000012 | Mar 26, 2024 | Mar 21, 2024 |
| 8-K | 8-K | 0000936395-24-000006 | Mar 7, 2024 | — |
| 8-K | 8-K | 0000936395-23-000041 | Dec 7, 2023 | — |
| 8-K | 8-K | 0001193125-23-263172 | Oct 25, 2023 | Oct 24, 2023 |
| 8-K | 8-K | 0000936395-23-000037 | Oct 3, 2023 | Oct 2, 2023 |
| 8-K | 8-K | 0000936395-23-000030 | Aug 31, 2023 | — |
| 8-K | 8-K | 0000936395-23-000024 | Jun 6, 2023 | — |
| 8-K | 8-K | 0001193125-23-093438 | Apr 6, 2023 | — |
| 8-K | 8-K | 0000936395-23-000018 | Apr 3, 2023 | Mar 30, 2023 |
| 8-K | 8-K | 0000936395-23-000009 | Mar 6, 2023 | — |
| 8-K | 8-K | 0001193125-23-040339 | Feb 15, 2023 | Feb 10, 2023 |
| 8-K | 8-K | 0001193125-23-017784 | Jan 27, 2023 | Jan 26, 2023 |
| 8-K | 8-K | 0000936395-23-000003 | Jan 24, 2023 | — |
| 8-K | 8-K | 0001193125-23-012175 | Jan 23, 2023 | Jan 19, 2023 |
| 8-K | 8-K | 0000936395-22-000058 | Dec 8, 2022 | — |
| 8-K | 8-K | 0000936395-22-000055 | Nov 22, 2022 | — |
| 8-K | 8-K | 0000936395-22-000049 | Sep 1, 2022 | — |
| 8-K | 8-K | 0000936395-22-000042 | Jun 2, 2022 | — |
| 8-K | 8-K | 0000936395-22-000035 | Apr 20, 2022 | Mar 31, 2022 |
| 8-K | 8-K | 0000936395-22-000024 | Mar 7, 2022 | — |
| 8-K | 8-K | 0000936395-22-000016 | Feb 15, 2022 | — |
| 8-K | 8-K | 0001193125-22-011373 | Jan 18, 2022 | — |
| 8-K | 8-K | 0000936395-22-000006 | Jan 12, 2022 | Jan 11, 2022 |
| 8-K | 8-K | 0000936395-22-000004 | Jan 10, 2022 | — |
| 8-K | 8-K | 0001193125-21-356718 | Dec 14, 2021 | Dec 13, 2021 |
| 8-K | 8-K | 0000936395-21-000048 | Dec 9, 2021 | — |
| 8-K | 8-K | 0000936395-21-000046 | Nov 3, 2021 | Oct 31, 2021 |
| 8-K | 8-K | 0000936395-21-000036 | Sep 2, 2021 | — |
| 8-K | 8-K | 0000936395-21-000027 | Jun 3, 2021 | — |
| 8-K | 8-K | 0000936395-21-000015 | Apr 6, 2021 | Apr 1, 2021 |
| 8-K | 8-K | 0000936395-21-000006 | Mar 4, 2021 | — |
| 8-K | 8-K | 0000936395-20-000038 | Dec 10, 2020 | — |
| 8-K | 8-K | 0000936395-20-000033 | Sep 3, 2020 | — |
| 8-K | 8-K | 0000936395-20-000030 | Jul 1, 2020 | Jun 30, 2020 |