Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Reiss Gunter
  2. Issuer Name and Ticker or Trading Symbol
A10 Networks, Inc. [ATEN]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP Worldwide Mktg & Bus Dev
(Last)
(First)
(Middle)
C/O A10 NETWORKS, INC., 3 WEST PLUMERIA DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
12/03/2017
(Street)

SAN JOSE, CA 95134
4. If Amendment, Date Original Filed(Month/Day/Year)
12/05/2017
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 12/03/2017   A   30,000 (1) A $ 0 134,929 (2) D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $ 7.87 12/03/2017   A   75,000   11/23/2017(3) 12/03/2027 Common Stock 75,000 $ 0 75,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Reiss Gunter
C/O A10 NETWORKS, INC.
3 WEST PLUMERIA DRIVE
SAN JOSE, CA 95134
      VP Worldwide Mktg & Bus Dev  

Signatures

 /s/ Robert Cochran, as Attorney-in-Fact   12/21/2017
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Each share is represented by a Restricted Stock Unit ("RSU"). One-fourth (1/4) of the total RSUs will vest on each of the first four (4) anniversaries of the Vesting Commencement Date (11/5/2017), provided that the Reporting Person continues to serve through each vesting date.
(2) Includes shares acquired by the Reporting Person pursuant to the Issuer's Employee Stock Purchase Plan.
(3) One-fourth (1/4) of the shares subject to the option will vest on the first anniversary of the Vesting Commencement Date (10/23/2017), and the remaining shares will vest in equal monthly installments over the following 36 months, provided that the Reporting Person continues to serve through each vesting date.
 
Remarks:
This amendment restates in its entirety the Reporting Person's Form 4 that was filed on December 5, 2017, as amended on December 8, 2017.  The issuance of the securities described in that Form 4 was effected on December 3, 2017 as originally reported.  The amendment filed on December 8, 2017 should be disregarded.

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