Proxy Results (Form 8-K)

Ribbon Communications Inc. (the "Company") held its annual meeting of stockholders on June 3, 2026 (the "Annual Meeting"). At the Annual Meeting, the Company's stockholders considered and voted upon the matters listed below. A total of 163,724,665 shares of common stock were present in person or represented by proxy at the Annual Meeting, representing approximately 93% of the Company's outstanding common stock as of the April 6, 2026 record date. The following are the voting results for the proposals considered and voted upon at the Annual Meeting, each of which were described in the Proxy Statement.