X0609 4 2026-05-15 0001078271 EXTREME NETWORKS INC EXTR 0001658818 HOLMGREN KATHLEEN M false 2121 RDU CENTER DR. MORRISVILLE NC 27560 1 0 Common Stock 2026-05-15 4 S 0 19521 24.7827 D 219308 I By Trust The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.7741 to $24.8300 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Shares are held in Holmgren Family Rev Living Trust - Kathleen Holmgren, Trustee. /s/ Daniel Ricks, Power of Attorney for Kathleen M Holmgren 2026-05-18