Ribbon munications (RBBN) - 2025 Q4 - Annual Results

Exhibit 99.1 Ribbon Communications Inc. Reports Fourth Quarter and Full Year 2025 Financial Results Strong Cash Flow and Bookings from Expanding Voice Modernization Customer Base U.S. Tier 1 Service Provider Sales up over 25% in 2025 Delays in Customer Projects and Budget Timing Impacted 4Q Results Targeting Expansion in High Growth AI and Defense Markets New Tax Benefit Expected to Result in Improved Cash Conversion PLANO, Texas – Ribbon Communications Inc. (Nasdaq: RBBN), a global leader in real-time comm ...