X0609 4 2026-04-22 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 2026-04-22 4 A 0 7233 0 A 93504 D Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 22, 2027 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date. /s/ Jill Osato, Attorney-in-fact 2026-04-22