A10 Networks (ATEN) 10-Q 2021 Q1 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of A10 Networks, Inc. (the “Company”) for the three months ended March 31, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dhrupad Trivedi, President and Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	April 30, 2021	By: /s/ Dhrupad Trivedi
		Dhrupad Trivedi
		President and Chief Executive Officer