A10 Networks, Inc. — Director's Dealing 2014

Mar 20, 2014

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: A10 Networks, Inc. (ATEN)
CIK: 0001580808
Period of Report: 2014-03-20

Reporting Person: Summit Partners Growth Equity Fund VIII-A, L.P. (10% Owner)
Reporting Person: Summit Partners Growth Equity Fund VIII-B, L.P. (10% Owner)
Reporting Person: Summit Investors I, LLC (10% Owner)
Reporting Person: Summit Investors I (UK), L.P. (10% Owner)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series D Redeemable Convertible Preferred Stock	$		Common Stock (9427846)		Direct

Footnotes

F1: The Series D Redeemable Convertible Preferred Stock will automatically convert into shares of A10 Networks, Inc.'s (the "Issuer") common stock at a conversion ratio of 117.8481-to-one upon the closing of the Issuer's initial public offering for no additional consideration. The Series D Redeemable Convertible Preferred Stock does not have an expiration date.

F2: On an as converted basis, the Series D Redeemable Convertible Preferred Stock is held as follows: 6,873,136 in the name of Summit Partners Growth Equity Fund VIII-A, L.P.; 2,510,989 in the name of Summit Partners Growth Equity Fund VIII-B, L.P., 40,186 in the name of Summit Investors I, LLC; and 3,535 in the name of Summit Investors I (UK), L.P.