# EDGAR Filing Document

**Accession Number:** 0001580808
**File Stem:** 0001580808-23-000040
**Filing Date:** 2023-2
**Character Count:** 6789
**Document Hash:** 21ceb474480fdf38281437e8ecebdd01
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001580808-23-000040.hdr.sgml**: 20230222

**ACCESSION NUMBER**: 0001580808-23-000040

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230221

**FILED AS OF DATE**: 20230222

**DATE AS OF CHANGE**: 20230222

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Trivedi Dhrupad
- **CENTRAL INDEX KEY:** 0001570462

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36343
- **FILM NUMBER:** 23654433

**MAIL ADDRESS:**
- **STREET 1:** 1 N. BRENTWOOD BLVD.
- **STREET 2:** SUITE 1599
- **CITY:** SAINT LOUIS
- **STATE:** MO
- **ZIP:** 63105
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** A10 Networks, Inc.
- **CENTRAL INDEX KEY:** 0001580808
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMPUTER COMMUNICATIONS EQUIPMENT [3576]
- **IRS NUMBER:** 201446869
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2300 ORCHARD PKWY
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131
- **BUSINESS PHONE:** (408) 325-8668

**MAIL ADDRESS:**
- **STREET 1:** 2300 ORCHARD PKWY
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Trivedi Dhrupad<br><sub>(Last) (First) (Middle)</sub><br>C/O A10 NETWORKS, INC.<br>2300 ORCHARD PARKWAY<br><sub>(Street)</sub><br>SAN JOSE, CA 95131<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-21 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Executive Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>A10 Networks, Inc. [ ATEN ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2023-02-21 |  | A |  | 105890<sup>(1)</sup> | A | $0 | 616900 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Performance-based Restricted Stock Units | <sup>(2)</sup> | 2023-02-21 |  | A |  | 158835 |  | <sup>(3)</sup> | 2027-02-21 | Common Stock | 158835.0 | $0 | 158835 | D |  |

---

### Footnotes:

(1) Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2023), provided that the Reporting Person continues to serve through each such vesting date.

(2) Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

(3) Grant of 158,835 Performance-Based Restricted Stock Units, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027 (each, a "Performance Milestone"). Upon achievement of a Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, with one-half (1/2) vesting within thirty (30) days of achievement of the Performance Milestone and an additional one-fourth (1/4) vesting on each of the first and second anniversaries of the date of achievement of the corresponding Performance Milestone.

**Signature:** /s/ Jill Osato, Attorney-in-fact  
**Date:** 2023-02-22

### Remarks:

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.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**