---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-010898"
form_type: "8-K"
ticker: "RBBN"
cik: "0001708055"
company_name: "Ribbon Communications Inc."
filed_at: "2026-02-05T23:59:59+00:00"
generated_at: "2026-05-16T04:29:30.075710+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Ribbon Q4 revenue $227M (-10% YoY), GAAP OI $9M vs $33M; record bookings $50M+ from voice modernization

## Summary
- Revenue $227M vs $251M in Q4 2024; GAAP operating income fell to $9M from $33M.
- Non-GAAP Adjusted EBITDA $40M vs $55M year ago; GAAP gross margin 53.3% vs 55.7%.
- Full-year revenue $845M (+1.3% YoY); GAAP operating loss ($3M) vs $17M profit; net income $40M vs ($54M).
- Record Q4 product and services bookings exceeding $50M from new voice modernization programs across multiple regions.
- CFO expects tax benefit to reduce cash tax payments by $15-$20M over next several years starting in 2026.

## SEC filing metadata
- accession: 0001104659-26-010898
- form_type: 8-K
- ticker: RBBN
- cik: 0001708055
- company_name: Ribbon Communications Inc.
- filed_at: 2026-02-05T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- 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/1708055/000110465926010898/0001104659-26-010898-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708055/000110465926010898/tm265336d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-010898
- JSON: https://secwatch.observer/filing/0001104659-26-010898.json
- Plain text: https://secwatch.observer/filing/0001104659-26-010898.txt

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