8-K current report · filed Apr 28, 2026

Ribbon Communications Inc. (RBBN) 8-K Current Report: April 28, 2026

Item 2.02Item 5.02Item EX-99.1RBBN overview

Short answer

Ribbon Communications Inc. (RBBN) filed an 8-K current report with the SEC on April 28, 2026 reporting Item 2.02 (Results of Operations and Financial Condition), Item 5.02 (Departure/Election of Directors or Officers), Item EX-99.1 (Exhibit EX-99.2). Q1 2026 results covered quarter ended March 31, 2026.

Ribbon Communications Inc. 8-K event analysis

AI summary of each reported item and its exhibits

Item 2.02 · Results of Operations and Financial Condition

  • Q1 2026 results covered quarter ended March 31, 2026
  • Financial details contained in Exhibit 99.1, Ribbon’s accompanying earnings press release
  • Release issued April 28, 2026
  • Earnings disclosure furnished under Item 2.02 and generally not treated as filed under Exchange Act Section 18

Item 5.02 · Departure/Election of Directors or Officers

  • CFO John Townsend resigns April 30, 2026 for another opportunity, with no reported disagreement
  • Eric Marmurek becomes CFO and Chief Accounting Officer May 1, 2026
  • Internal succession supports continuity after Marmurek’s 15-plus years with Ribbon and predecessor companies
  • New CFO compensation: $475,000 base salary, 75% target bonus, annual equity eligibility
  • No disclosed related-party interests, family relationships, or appointment arrangements impacting independence

Item EX-99.1 · Exhibit EX-99.2

  • Q1 revenue $163M, down from $181M; GAAP operating loss widened to $32M from $20M
  • Gross margin fell to 42.9% from 45.4%; non-GAAP Adjusted EBITDA turned negative at $8M versus $6M positive
  • Cash declined $28.5M to $69.6M, while operating cash flow was negative $22.0M
  • Q2 outlook calls for revenue $185M-$195M, non-GAAP gross margin 49%-50%, and Adjusted EBITDA $9M-$14M
  • Management expects second-half growth from service-provider projects, IP and optical deployments, AIOps, and data-center interconnect wins

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