---
schema_version: "secwatch.filing_event.v1"
accession: "0000936395-23-000041"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2023-12-07T23:59:59+00:00"
generated_at: "2026-06-07T16:41:41.516020+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Ciena Q4 revenue $1.13B, up 16% YoY; GAAP EPS $0.62, adjusted $0.75; annual rev up 21%

## Summary
- Q4 revenue $1.13B (vs $971M prior year); GAAP net income $91.2M ($0.62/share), adjusted net income $111.2M ($0.75/share).
- Fiscal 2023 revenue $4.39B, up 20.8% YoY; GAAP EPS $1.71, adjusted EPS $2.72.
- Optical Networking segment revenue $748M (66.2% of total); Routing and Switching $129M (11.4%).
- Repurchased ~4.2M shares for $188.8M during Q4; cash and investments ended at $1.25B.
- Two customers combined for 29.7% of Q4 revenue; headcount 8,483.

## SEC filing metadata
- accession: 0000936395-23-000041
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2023-12-07T23:59:59+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/936395/000093639523000041/0000936395-23-000041-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000093639523000041/cien-20231206.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000936395-23-000041
- JSON: https://secwatch.observer/filing/0000936395-23-000041.json
- Plain text: https://secwatch.observer/filing/0000936395-23-000041.txt

## Key facts
- Earnings Releases
  CIENA CORP reported fiscal fourth quarter ended October 28, 2023 results: revenue $1.13 billion, net income $0.62 per diluted common share, EPS $0.62 per diluted common share.
  - Period: fiscal fourth quarter ended October 28, 2023
  - Revenue: $1.13 billion
  - Net income: $0.62 per diluted common share
  - EPS: $0.62 per diluted common share
  - Result: reported results
  source text: Ciena Reports Fiscal Fourth Quarter 2023 Financial Results Annual revenue increased 21% HANOVER, Md. - December 7, 2023 - Ciena ® Corporation (NYSE: CIEN), a networking systems, services and software company, today announced unaudited financial results for its fiscal fourth quarter ended October 28, 2023. • Q4 Revenue : $1.13 billion • Q4 Net Income per Share: $0.62 GAAP; $0.75 adjusted (non-GAAP)
  evidence_url: https://www.sec.gov/Archives/edgar/data/936395/000093639523000041/0000936395-23-000041-index.htm

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