---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-22-051178"
form_type: "8-K"
ticker: "RBBN"
cik: "0001708055"
company_name: "Ribbon Communications Inc."
filed_at: "2022-04-27T23:59:59+00:00"
generated_at: "2026-06-26T04:09:41.201101+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Ribbon Q1 revenue down 10% YoY to $173M; GAAP EPS -$0.47; North American IP Optical up 190%

## Summary
- Revenue $173M down 10% YoY from $193M; GAAP net loss $70M vs $45M loss a year ago.
- GAAP diluted loss per share -$0.47 vs -$0.31; non-GAAP diluted loss per share -$0.08 vs +$0.03.
- North American IP Optical Networks sales up 190% YoY; total bookings-to-revenue ratio 1.20x.
- Adjusted EBITDA -$9M vs +$20M in prior year; non-GAAP net loss $12M vs income $5M.
- Management projects strong Q2 sequential revenue growth; announced Microsoft Cloud & Edge partnership.

## SEC filing metadata
- accession: 0001104659-22-051178
- form_type: 8-K
- ticker: RBBN
- cik: 0001708055
- company_name: Ribbon Communications Inc.
- filed_at: 2022-04-27T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1708055/000110465922051178/0001104659-22-051178-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708055/000110465922051178/tm2213654d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-22-051178
- JSON: https://secwatch.observer/filing/0001104659-22-051178.json
- Plain text: https://secwatch.observer/filing/0001104659-22-051178.txt

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