---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-015006"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2026-03-05T23:59:59+00:00"
generated_at: "2026-05-15T21:19:15.039990+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Ciena Q1 revenue $1.43B (+33% YoY); adjusted EPS $1.35 (+111% YoY); raises FY26 guidance

## Summary
- Revenue $1.43B, up 33% YoY; GAAP EPS $1.03, adjusted EPS $1.35, up 111% YoY.
- Q2 revenue guidance $1.5B ± $50M; FY26 revenue raised to $5.9B–$6.3B (midpoint +28% YoY).
- Adjusted gross margin 44.7% (flat YoY); adjusted op margin 17.9% (up 560 bps YoY).
- Adjusted EBITDA $287M, up 84% YoY; record Q1 backlog cited; AI-driven demand strong.

## SEC filing metadata
- accession: 0001628280-26-015006
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2026-03-05T23:59:59+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/936395/000162828026015006/0001628280-26-015006-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000162828026015006/cien-20260305.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-015006
- JSON: https://secwatch.observer/filing/0001628280-26-015006.json
- Plain text: https://secwatch.observer/filing/0001628280-26-015006.txt

## Key facts
- Earnings Releases
  CIENA CORP reported fiscal first quarter 2026 results: revenue $1.43 billion, net income $1.03 GAAP and $1.35 adjusted (non-GAAP), EPS $1.03 GAAP and $1.35 adjusted (non-GAAP). Guidance raised.
  - Period: fiscal first quarter 2026
  - Revenue: $1.43 billion
  - Net income: $1.03 GAAP and $1.35 adjusted (non-GAAP)
  - EPS: $1.03 GAAP and $1.35 adjusted (non-GAAP)
  - Guidance: raised
  - Result: reported results
  source text: Ciena Reports Fiscal First Quarter 2026 Financial Results Summary • Fiscal first quarter 2026 revenue was $1.43 billion, up 33% year-over-year • Fiscal first quarter 2026 adjusted Earnings Per Share (EPS) was $1.35, an increase of 111% compared to fiscal first quarter 2025 • Providing revenue guidance of $1.5 billion plus or minus $50 million for fiscal second quarter 2026 • Raising revenue guidance range for fiscal year 2026 to $5.9 billion to $6.3 billion, a 28% increase year-over-year at the midpoint
  evidence_url: https://www.sec.gov/Archives/edgar/data/936395/000162828026015006/0001628280-26-015006-index.htm

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