---
schema_version: "secwatch.filing_event.v1"
accession: "0000936395-25-000023"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2025-06-05T23:59:59+00:00"
generated_at: "2026-05-19T23:24:51.226690+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Ciena Q2 FY2025 revenue $1.13B (+23.6% YoY), GAAP EPS $0.06, non-GAAP $0.42

## Summary
- Revenue $1.13B up 23.6% YoY; Optical Networking $773.6M (68.7% of total) drove growth.
- GAAP net income $9.0M ($0.06 diluted EPS) vs net loss $(16.8M) a year ago; adjusted net income $60.7M ($0.42 EPS).
- Adjusted EBITDA $116.7M, up 36% YoY; cash flow from operations $156.9M.
- Repurchased ~1.2M shares for $84.3M during the quarter.
- Two customers combined for 23.9% of revenue; Americas $833.8M (74.1% of total).

## SEC filing metadata
- accession: 0000936395-25-000023
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2025-06-05T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/936395/000093639525000023/0000936395-25-000023-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000093639525000023/cien-20250605.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000936395-25-000023
- JSON: https://secwatch.observer/filing/0000936395-25-000023.json
- Plain text: https://secwatch.observer/filing/0000936395-25-000023.txt

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