---
schema_version: "secwatch.filing_event.v1"
accession: "0000936395-21-000048"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2021-12-09T23:59:59+00:00"
generated_at: "2026-06-28T02:41:32.051200+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Ciena Q4 revenue up 25.7% YoY to $1.04B; adjusted EPS $0.85, +41.7%; authorizes $1B buyback

## Summary
- Revenue of $1.0415B, up 25.7% YoY; full-year revenue $3.62B, up 2.5%.
- GAAP net income $103.5M ($0.66/diluted share); adjusted net income $132.7M ($0.85/diluted share).
- Board authorized repurchase of up to $1.0B of common stock, replacing prior program; intends $250M accelerated share repurchase.
- Cash flow from operations $254.9M in Q4; cash and investments $1.7B.
- Networking Platforms revenue $828.8M, 79.6% of total; Americas revenue $748.7M (71.9% of total).

## SEC filing metadata
- accession: 0000936395-21-000048
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2021-12-09T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/936395/000093639521000048/0000936395-21-000048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000093639521000048/cien-20211209.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000936395-21-000048
- JSON: https://secwatch.observer/filing/0000936395-21-000048.json
- Plain text: https://secwatch.observer/filing/0000936395-21-000048.txt

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