---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-056425"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2025-12-11T23:59:59+00:00"
generated_at: "2026-05-16T13:36:46.314506+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Ciena Q4 FY2025 revenue $1.35B (+20% YoY); guides FY2026 revenue $5.7-6.1B

## Summary
- Q4 revenue $1.352B, up 20% YoY; FY2025 revenue $4.77B, up 19% YoY.
- GAAP diluted EPS $0.13; adjusted EPS $0.91 in Q4. FY2025 GAAP EPS $0.85; adjusted $2.64.
- Q1 FY2026 revenue guidance $1.35B-$1.43B; non-GAAP gross margin 43%-44%.
- FY2026 revenue guidance $5.7B-$6.1B; targeting non-GAAP operating margin ~17%.
- CEO cites demand from cloud and service providers and expanding AI ecosystem role.

## SEC filing metadata
- accession: 0001628280-25-056425
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2025-12-11T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/936395/000162828025056425/0001628280-25-056425-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000162828025056425/cien-20251211.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-056425
- JSON: https://secwatch.observer/filing/0001628280-25-056425.json
- Plain text: https://secwatch.observer/filing/0001628280-25-056425.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.