A10 Networks, Inc. — Director's Dealing 2014

Dec 24, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: A10 Networks, Inc. (ATEN)
CIK: 0001580808
Period of Report: 2014-12-22

Reporting Person: SMETS RAYMOND J (VP of Worldwide Sales)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-12-22	Employee Stock Option (right to buy)	$4.40	A	96000	Acquired	2024-12-22	Common Stock (96000)	Direct
2014-12-22	Performance Restricted Stock Units	$	A	33333	Acquired		Common Stock (33333)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	68166	Direct

Footnotes

F1: Includes 1,500 shares acquired by the Reporting Person on November 20, 2014 under the Issuer's Employee Stock Purchase Plan.

F2: 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.

F3: Each restricted stock unit represents a contingent right to receive one share of A10 Networks, Inc. common stock.

F4: This Performance Restricted Stock Unit award vests within the four year anniversary of the grant based on the achievement of certain market-related performance criteria. The number of shares reported in this Form 4 reflects the minimum number that may be acquired by the Reporting Person. The Reporting Person may acquire shares equal to an additional 200% of the minimum number depending on the potential achievement of market-related performance criteria.