X0206 3 2014-03-20 0 0001580808 A10 Networks, Inc. ATEN 0001358721 COCHRAN ROBERT D C/O A10 NETWORKS, INC. 3 WEST PLUMERIA DRIVE SAN JOSE CA 95134 1 1 0 0 VP, Legal & Corp Collaboration Common Stock 125065 D Employee Stock Option (right to buy) 3.0375 2012-01-13 2022-01-13 Common Stock 136000 D Employee Stock Option (right to buy) 3.0375 2013-01-12 2022-01-13 Common Stock 37333 D Employee Stock Option (right to buy) 8.5125 2013-11-24 2023-10-24 Common Stock 106665 D Series A Preferred Stock Common Stock 33333 D Series B Preferred Stock Common Stock 15686 D Series C Preferred Stock Common Stock 20144 D One-fourth (1/4) of the shares subject to the option vested on January 12, 2013, and one forty-eighth (1/48) of the shares vest monthly thereafter, provided that the Reporting Person continues to serve through each vesting date. The option may also be early exercised, and such shares would be subject to a right of repurchase by the Issuer. One-fourth (1/4) of the shares subject to the option vested on January 12, 2013, and one forty-eighth (1/48) of the shares vest monthly thereafter, provided that the Reporting Person continues to serve through each vesting date. One forty-eighth (1/48) of the shares subject to the option will vest monthly, provided that the Reporting Person continues to serve through each vesting date. Such preferred stock shall automatically convert into Common Stock on a one for one basis immediately prior to the closing of the Issuer's initial public offering of common stock and has no expiration date. Robert Cochran 2014-03-20