UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to ______ Commission file number 000-25711 EXTREME NETWORKS, INC. Indicate by check mark whether the registrant has submitted electronically every Intera ...