---
schema_version: "secwatch.filing_event.v1"
accession: "0000936395-21-000036"
form_type: "8-K"
ticker: "CIEN"
cik: "0000936395"
company_name: "CIENA CORP"
filed_at: "2021-09-02T23:59:59+00:00"
generated_at: "2026-06-29T06:19:00.705517+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Ciena Q3 revenue $988M, adj. EPS $0.92; acquires Vyatta virtual routing from AT&T

## Summary
- Revenue $988.1M (+1.2% YoY); GAAP EPS $1.52 includes $124.2M tax benefit; adj. EPS $0.92 vs $1.06 YoY.
- GAAP operating margin 15.0% (down from 19.3%); adj. operating margin 19.1% (down from 22.4%).
- Ciena to acquire Vyatta virtual routing/switching from AT&T; expected close by end of calendar year; terms undisclosed.
- Ciena to support Vyatta in AT&T's 5G wireless network; engineering team to be integrated into Ciena R&D.
- Cash and investments $1.5B; repurchased $26M in shares during quarter.

## SEC filing metadata
- accession: 0000936395-21-000036
- form_type: 8-K
- ticker: CIEN
- cik: 0000936395
- company_name: CIENA CORP
- filed_at: 2021-09-02T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/936395/000093639521000036/0000936395-21-000036-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936395/000093639521000036/cien-20210902.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000936395-21-000036
- JSON: https://secwatch.observer/filing/0000936395-21-000036.json
- Plain text: https://secwatch.observer/filing/0000936395-21-000036.txt

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