---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-060245"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2026-09-03T11:07:42+00:00"
generated_at: "2026-09-03T11:10:24.652496+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Ciena Q3 FY26 revenue up 37% to $1.67B; adjusted EPS $2.11, up 215% YoY

## Summary
- Revenue $1.67B, up 37% YoY from $1.22B; GAAP EPS $1.83 vs $0.35 prior year.
- Adjusted EPS $2.11 vs $0.67 YoY; non-GAAP gross margin 46.4% vs 41.9%.
- Q4 FY26 guidance: revenue $1.75B ± $50M; non-GAAP operating margin ~20%.
- FY26 revenue guidance raised to $6.42B ± $50M, a 35% YoY increase at midpoint.
- CEO Gary Smith cites AI-driven network investment demand as key growth driver.

## SEC filing metadata
- accession: 0001628280-26-060245
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2026-09-03T11:07:42+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/936395/000162828026060245/0001628280-26-060245-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000162828026060245/cien-20260903.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-060245
- JSON: https://secwatch.observer/filing/0001628280-26-060245.json
- Plain text: https://secwatch.observer/filing/0001628280-26-060245.txt

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