13D Filing: Viex Capital Advisors, LLC and A10 Networks Inc. (ATEN)

C.

VIEX GP

(a)

VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the 1,719,575 Shares owned by Series One.

Percentage: 2.4%

(b)

1. Sole power to vote or direct vote: 0 2. Shared power to vote or direct vote: 1,719,575 3. Sole power to dispose or direct the disposition: 0 4. Shared power to dispose or direct the disposition: 1,719,575

(c)

VIEX GP has not entered into any transactions in the Shares during the past 60 days. The transactions in the shares on behalf of Series One during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

D.

VSO GP II

(a)

VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the 1,967,808 Shares owned by VSO II.

Percentage: Approximately
2.8%

(b)

1. Sole power to vote or direct vote: 0 2. Shared power to vote or direct vote: 1,967,808 3. Sole power to dispose or direct the disposition: 0 4. Shared power to dispose or direct the disposition: 1,967,808

(c)

VSO GP II has not entered into any transactions in the Shares during the past 60 days. The transactions in the Shares on behalf of VSO II during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

E.

VIEX Capital

(a)

VIEX Capital, as the investment manager of Series One and VSO II, may be deemed the beneficial owner of the (i) 1,719,575 Shares owned by Series One and (ii) 1,967,808 owned by VSO II.

Percentage: Approximately
5.2%

(b)

1. Sole power to vote or direct vote: 0 2. Shared power to vote or direct vote: 3,687,383 3. Sole power to dispose or direct the disposition: 0 4. Shared power to dispose or direct the disposition: 3,687,383

(c)

VIEX Capital has not entered into any transactions in the Shares during the past 60 days. The transactions in the Shares on behalf of each of Series One and VSO II during the past 60 days are set forth in Schedule A and are incorporated herein by reference.