SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Singer Eric

(Last) (First) (Middle)
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY

(Street)
SAN JOSE CA 95131

(City) (State) (Zip)
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)
3. Date of Earliest Transaction (Month/Day/Year)
05/05/2022
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
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, par value $0.00001 05/05/2022 S 116,535 D $15.0876(3) 135,139 D(1)(2)
Common Stock, par value $0.00001 05/06/2022 S 62,000 D $14.9356(4) 73,139 D(1)(2)
Common Stock, par value $0.00001 05/05/2022 S 150,000 D $15.4483(7) 495,541 I By Viex Opportunities Fund, LP - Series One(1)(2)(5)
Common Stock, par value $0.00001 05/06/2022 S 90,000 D $15.0693(8) 405,541 I By Viex Opportunities Fund, LP - Series One(1)(2)(5)
Common Stock, par value $0.00001 05/09/2022 S 100,000 D $14.1582(9) 305,541 I By Viex Opportunities Fund, LP - Series One(1)(2)(5)
Common Stock, par value $0.00001 05/05/2022 S 80,000 D $15.4483(10) 103,036 I By Viex Opportunities Fund, LP - Series Two(1)(2)(6)
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 Securities Underlying Derivative Security (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: 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
1. Name and Address of Reporting Person*
Singer Eric

(Last) (First) (Middle)
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY

(Street)
SAN JOSE CA 95131

(City) (State) (Zip)
1. Name and Address of Reporting Person*
VIEX Opportunities Fund, LP Series One

(Last) (First) (Middle)
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY

(Street)
SAN JOSE CA 95131

(City) (State) (Zip)
1. Name and Address of Reporting Person*
VIEX Opportunities Fund, LP - Series Two

(Last) (First) (Middle)
C/O A10 NETWORKS, INC.
2300 ORCHARD PARKWAY

(Street)
SAN JOSE CA 95131

(City) (State) (Zip)
Explanation of Responses:
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 GP, LLC ("VIEX GP"), 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. Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $15.00 to $15.18. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.
4. Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $14.90 to $14.98. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.
5. 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.
6. 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.
7. Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $14.90 to $16.50. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.
8. Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $14.84 to $15.46. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.
9. Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $13.79 to $14.66. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.
10. Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $14.90 to $16.50. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.
/s/ Eric Singer 05/09/2022
VIEX Opportunities Fund, LP - Series One, By: VIEX GP, LLC, its general partner, By: /s/ Eric Singer, Managing Member 05/09/2022
VIEX Opportunities Fund, LP - Series Two, By: VIEX GP, LLC, its general partner, By: /s/ Eric Singer, Managing Member 05/09/2022
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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