---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-087534"
form_type: "8-K"
ticker: "RBBN"
cik: "0001708055"
company_name: "Ribbon Communications Inc."
filed_at: "2026-07-28T20:09:55+00:00"
generated_at: "2026-07-28T20:11:18.123591+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Ribbon Communications Q2 2026 revenue $192M, down 13% YoY; sequential improvement with record IP Optical bookings

## Summary
- Q2 2026 revenue $192M, down 13% YoY from $221M; GAAP net loss $27M vs $11M loss YoY.
- Non-GAAP adjusted EBITDA $12M, down from $32M YoY; GAAP diluted EPS ($0.15) vs ($0.06).
- Revenue up 18% sequentially; profitability improved $20M QoQ; record IP Optical bookings.
- Enterprise wins: Microsoft Teams Voice deployment with top tier financial institution; Salesforce partnership.
- Management expects sequential revenue growth and improved earnings in 2H 2026.

## SEC filing metadata
- accession: 0001104659-26-087534
- form_type: 8-K
- ticker: RBBN
- cik: 0001708055
- company_name: Ribbon Communications Inc.
- filed_at: 2026-07-28T20:09:55+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/1708055/000110465926087534/0001104659-26-087534-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708055/000110465926087534/tm2621444d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-087534
- JSON: https://secwatch.observer/filing/0001104659-26-087534.json
- Plain text: https://secwatch.observer/filing/0001104659-26-087534.txt

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