# EDGAR Filing Document

**Accession Number:** 0001580808
**File Stem:** 0001140361-23-011831
**Filing Date:** 2023-3
**Character Count:** 2042
**Document Hash:** 78fd5f1ecffda753cf47a46870357c55
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-23-011831.hdr.sgml**: 20230315

**ACCESSION NUMBER**: 0001140361-23-011831

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230315

**DATE AS OF CHANGE**: 20230315

**FILER**: 

**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

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36343
- **FILM NUMBER:** 23735444

**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

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### <br>

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### SCHEDULE 14A INFORMATION

#### PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE

#### SECURITIES EXCHANGE ACT OF 1934

#### <br>

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Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to Sec.240.14a-11(c) or Sec.240.14a-2

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| |
|:---|
| **A10 NETWORKS, INC.** |
| **(Name of Registrant as Specified In Its Charter)** |

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| | |
|:---|:---|
| Payment of Filing Fee (Check the appropriate box): | Payment of Filing Fee (Check the appropriate box): |
| ☒ | No fee required. |
| ☐ | Fee paid previously with preliminary materials. |
| ☐ | Fee computed in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(4) and 0-11. |

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![](ny20006318x2_nc1.jpg)

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![](ny20006318x2_nc2.jpg)

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