---
schema_version: "secwatch.filing_event.v1"
accession: "0000936395-24-000022"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2024-06-06T23:59:59+00:00"
generated_at: "2026-06-01T06:08:01.775290+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Ciena Q2 revenue falls 19.6% YoY to $910.8M; posts GAAP loss of $0.12/share

## Summary
- Revenue of $910.8M down 19.6% YoY from $1.13B; GAAP net loss of $16.8M vs. income of $57.7M last year.
- Adjusted EPS of $0.27 down 64% from $0.74 a year ago; adjusted operating margin 6.8% vs. 13.8%.
- Optical Networking revenue $560.2M (61.5% of total), down from $784.5M in Q2 2023 (69.3%).
- Repurchased 1.1M shares for $57M during quarter; cash from operations $58.5M; cash & investments $1.42B.
- Management cites service providers working through inventory amid strong bandwidth demand.

## SEC filing metadata
- accession: 0000936395-24-000022
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2024-06-06T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/936395/000093639524000022/0000936395-24-000022-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000093639524000022/cien-20240606.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000936395-24-000022
- JSON: https://secwatch.observer/filing/0000936395-24-000022.json
- Plain text: https://secwatch.observer/filing/0000936395-24-000022.txt

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