X0609 4 2026-05-05 0 0001580808 A10 Networks, Inc. ATEN 0001443284 Singer Eric false C/O A10 NETWORKS, INC. 2300 ORCHARD PARKWAY SAN JOSE CA 95131 1 0 0 0 0 Common Stock 2026-05-05 4 S 0 24698 27.21 D 68806 D This is the weighted average price of the shares sold, which ranged from $26.88 to $27.41 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. /s/ Jill Osato, Attorney-in-fact 2026-05-06