CIEN SEC Filings
SEC filings for CIEN. Annual and quarterly reports, 8-K events,
Form 4 insider filings and 13D/G stake disclosures.
| Form | Filed | Accession |
|---|---|---|
| SC 13G/AamendedFMR LLC | Aug 6, 2026 | 0000315066-26-001963EDGAR |
| SC 13G/AamendedAbigail P. Johnson | Aug 6, 2026 | 0000315066-26-001963EDGAR |
| SC 13GVanguard Capital Management | Apr 29, 2026 | 0002100119-26-000333EDGAR |
| SC 13GVanguard Portfolio Management | Apr 29, 2026 | 0002100121-26-000185EDGAR |
| SC 13G/AamendedVANGUARD GROUP INC | Mar 26, 2026 | 0000102909-26-000972EDGAR |
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Source: SEC EDGAR.