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 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person *
Singer Eric
  2. Issuer Name and Ticker or Trading Symbol
A10 Networks, Inc. [ATEN]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
  C/O A10 NETWORKS, INC. , 2300 ORCHARD PARKWAY
3. Date of Earliest Transaction (Month/Day/Year)
(Street)

  SAN JOSE   CA   95131
4. If Amendment, Date Original Filed (Month/Day/Year)
6. Individual or Join/Group Filing (Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code 4. Securities Acquired (A) or Disposed of (D) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) 6. Ownership Form: Direct (D) or Indirect (I) 7. Nature of Indirect Beneficial Ownership
Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security 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 5. Number of Derivative Securities Acquired (A) or Disposed of (D) 6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security 8. Price of Derivative Security 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) 11. Nature of Indirect Beneficial Ownership
Code V (A) (D)   Date Exercisable   Expriation Date   Title   Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Singer Eric
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY
SAN JOSE, CA95131
X

 
VIEX Opportunities Fund, LP Series One
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY
SAN JOSE, CA95131



  See Explanation of Responses
VIEX Opportunities Fund, LP - Series Two
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY
SAN JOSE, CA95131



  See Explanation of Responses
VIEX Special Opportunities Fund II, LP
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY
SAN JOSE, CA95131



  See Explanation of Responses

Signatures

 /s/ Eric Singer  2021-12-03
**Signature of Reporting Person Date

Explanation of Responses:

(*) If the form is filed by more than one reporting person, see Instruction 5(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) This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").
(2) Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or any other purpose.
(3) Securities of the Issuer beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One.
(4) Securities of the Issuer beneficially owned directly by Series Two. VIEX GP, as the general partner of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. VIEX Capital, as the investment manager of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two.
(5) Represents a pro-rata distribution of shares to limited partners by VSO II in connection with the wind-down of the fund.
(6) Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II.

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