---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-096938"
form_type: "8-K"
ticker: "RBBN"
cik: "0001708055"
company_name: "Ribbon Communications Inc."
filed_at: "2021-07-28T23:59:59+00:00"
generated_at: "2026-06-30T01:43:49.626250+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Ribbon Q2 revenue flat at $211M; GAAP net income $23M vs loss; Adj EBITDA $43M up 119%

## Summary
- Revenue $211M, flat YoY, up 10% sequentially; GAAP net income $23M vs loss of $8M in Q2 2020.
- Non-GAAP EPS $0.17 vs $0.08; Adjusted EBITDA $43M vs $30M, up 119% sequentially.
- Includes $12M non-cash gain from AVCT mark-to-market and $2.8M gain on QualiTech sale.
- Cash $115M at June 30, 2021 vs $94M a year ago.
- CEO cites IP Optical wins with Rogers, Singtel; India sales impacted by Covid surge.

## SEC filing metadata
- accession: 0001104659-21-096938
- form_type: 8-K
- ticker: RBBN
- cik: 0001708055
- company_name: Ribbon Communications Inc.
- filed_at: 2021-07-28T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- 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/1708055/000110465921096938/0001104659-21-096938-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708055/000110465921096938/tm2123289d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-096938
- JSON: https://secwatch.observer/filing/0001104659-21-096938.json
- Plain text: https://secwatch.observer/filing/0001104659-21-096938.txt

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