secwatch.observer — SEC 8-K summary
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Issuer:     Ribbon Communications Inc. (RBBN)
CIK:        0001708055
Form:       8-K
Filed at:   2026-04-28T23:59:59+00:00
Accession:  0001104659-26-050356
Event type: earnings
Sentiment:  negative
Materiality: 0.75
Item codes: 2.02, 5.02, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Ribbon Communications Q1 revenue $163M (-10% YoY), GAAP loss $34M; CFO Townsend resigns, Marmurek promoted
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- Revenue $163M (-10% YoY); GAAP net loss $34M ($0.20 EPS loss) vs $26M loss YoY.
- Non-GAAP adjusted EBITDA loss $8M vs positive $6M prior year; GAAP gross margin 42.9% vs 45.4%.
- CFO John Townsend resigns effective April 30 for other opportunity; Rick Marmurek promoted to CFO, CAO effective May 1.
- Management expects Q2 growth and strong H2; cites new Data Center Interconnect wins, AIOps traction, AWS collaboration.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1708055/000110465926050356/0001104659-26-050356-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1708055/000110465926050356/tm2612891d1_8k.htm
  HTML page:      https://secwatch.observer/filing/0001104659-26-050356

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer