0001239366-26-000006.txt : 20260424 0001239366-26-000006.hdr.sgml : 20260424 20260424160348 ACCESSION NUMBER: 0001239366-26-000006 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260422 FILED AS OF DATE: 20260424 DATE AS OF CHANGE: 20260424 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: CHUNG PETER Y CENTRAL INDEX KEY: 0001239366 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36343 FILM NUMBER: 26893507 MAIL ADDRESS: STREET 1: C/O SUMMIT PARTNERS STREET 2: 222 BERKELEY STREET, 18TH FLR CITY: BOSTON STATE: MA ZIP: 02116 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: A10 Networks, Inc. CENTRAL INDEX KEY: 0001580808 STANDARD INDUSTRIAL CLASSIFICATION: COMPUTER COMMUNICATIONS EQUIPMENT [3576] ORGANIZATION NAME: 06 Technology EIN: 201446869 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 2300 ORCHARD PKWY CITY: SAN JOSE STATE: CA ZIP: 95131 BUSINESS PHONE: (408) 325-8668 MAIL ADDRESS: STREET 1: 2300 ORCHARD PKWY CITY: SAN JOSE STATE: CA ZIP: 95131 4 1 form4-04242026_080444.xml X0609 4 2026-04-22 0001580808 A10 Networks, Inc. ATEN 0001239366 CHUNG PETER Y false C/O SUMMIT PARTNERS 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 true false false false 0 Common Stock 2026-04-22 4 A 0 7233 0 A 207298 I See Remarks Represents restricted stock units granted to Mr. Chung as part of the director compensation program. The restricted stock units will vest on the earlier of April 22, 2027, or the date of the Issuer's next Annual Meeting, and will settle solely by delivery of an equal number of shares of Common Stock provided that Mr. Chung remains in continuous service with the Issuer through the vesting date. The 207,298 shares and restricted stock units are held in the name of Mr. Chung, which are held for the benefit of Summit Partners, L.P. Mr. Chung holds any Common Stock and restricted stock units for the benefit of Summit Partners, L.P. and Mr. Chung disclaims beneficial ownership of the shares of common stock and the restricted stock units, except to the extent of their pecuniary interest therein. /s/Adam H. Hennessey, POA for Peter Y. Chung 2026-04-24