ATEN / A10 Networks, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

A10 Networks, Inc.
US ˙ NYSE ˙ US0021211018

Mga Batayang Estadistika
LEI 549300UQD4IWUML81Q35
CIK 1580808
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to A10 Networks, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
September 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 2, 2025 A10 NETWORKS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 2, 2025 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission Fi

September 5, 2025 EX-99.1

A10 Networks announces CFO transition

EX-99.1 Exhibit 99.1 Friday, September 5, 1:05 PM Pacific Time Media contact: Karin Gilles [email protected] A10 Networks announces CFO transition San Jose, Calif.—(BUSINESS WIRE) — A10 Networks, Inc. (NYSE: ATEN), a leading provider of secure application services and solutions, today announced that Brian Becker will be stepping down as the Chief Financial Officer and leaving the company at

August 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 5, 2025 Date of Report (Date of earliest event reported) A10 NETWORKS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 5, 2025 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

August 5, 2025 EX-99.1

A10 Networks Reports Financial Results for the Second Quarter of 2025 Company Grows Revenue and Earnings Per Share; Cybersecurity and AI Tailwinds Reinforce Strategic Positioning

EXHIBIT 99.1 A10 Networks Reports Financial Results for the Second Quarter of 2025 Company Grows Revenue and Earnings Per Share; Cybersecurity and AI Tailwinds Reinforce Strategic Positioning SAN JOSE, Calif., August 5, 2025 - A10 Networks, Inc. (NYSE: ATEN), a leading provider of secure application services and solutions, today announced financial results for its second quarter ended June 30, 202

August 5, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

August 5, 2025 EX-99.2

Q2 2025 Financial Results & Commentary August 5, 2025 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, includ

atenq22025earningscallsl Q2 2025 Financial Results & Commentary August 5, 2025 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our strategy, market, operations, profitability and positioning.

August 5, 2025 EX-10.1

Form of Performance-Based Restricted Stock Unit Agreement pursuant to the 2023 Stock Incentive Plan

exhibit101toform10-qq2x2 EXHIBIT 10.1 A10 NETWORKS, INC. 2023 STOCK INCENTIVE PLAN PERFORMANCE-BASED NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted the following Performance-Based Restricted Stock Units (the “Restricted Stock Units”, “RSUs” or this “Award”) representing shares of Common Stock of A10 Networks, Inc. (the “Company”) under the A10 Networks, Inc. 2023 Stock Incentive Plan

May 22, 2025 EX-1.01

Conflict Minerals Report for the reporting period January 1, 202

Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2024 is provided in accordance with Rule 13p-1 (“Rule 13p-1,” published at 17 CFR § 240.13p-1) under the Securities Exchange Act of 1934 (the “1934 Act”), the in

May 22, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 2300 Orchard Parkway San Jose, CA 95131 (Address of pr

May 8, 2025 EX-99.1

2014 Employee Stock Purchase Plan, as amended.

EXHIBIT 99.1 A10 NETWORKS, INC. 2014 EMPLOYEE STOCK PURCHASE PLAN (As amended April 17, 2025) 1.Purpose. The purpose of the Plan is to provide employees of the Company and its Designated Companies with an opportunity to purchase Common Stock through accumulated Contributions. The Company intends for the Plan to have two components: a Code Section 423 Component (“423 Component”) and a non-Code Sect

May 8, 2025 S-8

As filed with the Securities and Exchange Commission on May 8, 2025

As filed with the Securities and Exchange Commission on May 8, 2025 Registration No.

May 8, 2025 EX-FILING FEES

Filing Fee Table.

EXHIBIT 107 Calculation of Filing Fee Tables S-8 (Form Type) A10 Networks, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Share (2) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Fees to be Paid Equity Common Stock

May 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

May 1, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 1, 2025 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (

May 1, 2025 EX-99.2

Q1 2025 Financial Results & Commentary May 1, 2025 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including

Q1 2025 Financial Results & Commentary May 1, 2025 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our quarterly dividend payments and stock repurchase program, strategy, positioning, demand, U.

May 1, 2025 EX-99.1

A10 Networks Reports Financial Results for the First Quarter of 2025 Company Delivers Revenue Growth YoY and Expands Earnings Per Share Board Authorizes New Buyback Program

EXHIBIT 99.1 A10 Networks Reports Financial Results for the First Quarter of 2025 Company Delivers Revenue Growth YoY and Expands Earnings Per Share Board Authorizes New Buyback Program SAN JOSE, Calif., May 1, 2025 - A10 Networks, Inc. (NYSE: ATEN), a leading provider of secure application services and solutions, today announced financial results for its first quarter ended March 31, 2025.  First

April 18, 2025 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 April 17, 2025 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission File N

April 9, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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 Pro

March 20, 2025 8-K/A

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2025 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporatio

March 20, 2025 8-K

Unregistered Sales of Equity Securities, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 20, 2025 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission File

March 20, 2025 EX-4.1

Indenture, dated as of March 17, 2025, between A10 Networks, Inc. and U.S. Bank Trust Company, National Association, as trustee.

Exhibit 4.1 Execution Version A10 NETWORKS, INC. and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee INDENTURE Dated as of March 17, 2025 2.75% Convertible Senior Notes due 2030 TABLE OF CONTENTS Page Article 1. Definitions; Rules of Construction 1 Section 1.01. Definitions 1 Section 1.02. Other Definitions 13 Section 1.03. Rules of Construction 14 Article 2. The Notes 14 Section 2.01. Fo

March 20, 2025 EX-99.1

A10 Networks, Inc. Announces Pricing of Offering of $200 Million of Convertible Senior Notes

Exhibit 99.1 A10 Networks, Inc. Announces Pricing of Offering of $200 Million of Convertible Senior Notes San Jose, Calif.— March 13, 2025—A10 Networks, Inc. (NYSE: ATEN) (the “Company”) today announced the pricing on March 12, 2025 of its offering of $200,000,000 aggregate principal amount of 2.75% convertible senior notes due 2030 (the “notes”) in a private offering (the “offering”) that is exem

March 17, 2025 EX-4.1

Indenture, dated as of March 17, 2025, between A10 Networks, Inc. and U.S. Bank Trust Company, National Association, as trustee.

EX-4.1 Exhibit 4.1 Execution Version A10 NETWORKS, INC. and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee INDENTURE Dated as of March 17, 2025 2.75% Convertible Senior Notes due 2030 TABLE OF CONTENTS Page Article 1. Definitions; Rules of Construction 1 Section 1.01. Definitions 1 Section 1.02. Other Definitions 13 Section 1.03. Rules of Construction 14 Article 2. The Notes 14 Section 2

March 17, 2025 EX-99.1

A10 Networks, Inc. Announces Pricing of Offering of $200 Million of Convertible Senior Notes

EX-99.1 Exhibit 99.1 A10 Networks, Inc. Announces Pricing of Offering of $200 Million of Convertible Senior Notes San Jose, Calif.— March 13, 2025—A10 Networks, Inc. (NYSE: ATEN) (the “Company”) today announced the pricing on March 12, 2025 of its offering of $200,000,000 aggregate principal amount of 2.75% convertible senior notes due 2030 (the “notes”) in a private offering (the “offering”) that

March 17, 2025 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2025 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission File

March 12, 2025 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2025 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission File

March 12, 2025 EX-99.1

A10 Networks, Inc. Announces Proposed Offering of $200 Million of Convertible Senior Notes

Exhibit 99.1 A10 Networks, Inc. Announces Proposed Offering of $200 Million of Convertible Senior Notes San Jose, Calif. — March 12, 2025 —A10 Networks, Inc. (NYSE: ATEN) (the “Company”) today announced its intention to offer, subject to market conditions and other factors, $200,000,000 aggregate principal amount of convertible senior notes due 2030 (the “notes”) in a private offering (the “offeri

March 5, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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)) ☐ Definit

March 5, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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-

February 25, 2025 EX-21.1

List of subsidiaries of the Registrant

Subsidiary Name Jurisdiction of Incorporation or Organization A10 Networks, Anguilla, Ltd. Anguilla A10 Networks Turkey Dis Ticaret Limited Sirketi Turkey A10 Networks, Inc. - Taiwan Taiwan, Republic of China A10 Networks India Private Limited India A10 Networks, KK Japan A10 Networks Limited United Kingdom A10 Networks Singapore Pte. Ltd. Singapore A10 Networks Malaysia Sdn. Bhd. Malaysia

February 25, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWORKS,

February 25, 2025 EX-19.1

Insider Trading Policy

A10 NETWORKS, INC. INSIDER TRADING POLICY a n d GUIDELINES WITH RESPECT TO CERTAIN TRANSACTIONS IN SECURITIES Effective February 2, 2021 Updated February 21, 2025 -ii- TABLE OF CONTENTS Page INTRODUCTION ............................................................................................................................................... 1 Legal prohibitions on insider trading ............

February 4, 2025 EX-99.2

Q4 2024 Financial Results & Commentary February 4, 2025 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, incl

Q4 2024 Financial Results & Commentary February 4, 2025 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, demand, positioning, capital allocation strategy and value creation, and market and technology trends.

February 4, 2025 EX-99.1

A10 Networks Reports Fourth Quarter and Full Year 2024 Financial Results Demand Recovery from Service Providers and Continued Execution in Enterprise Business

EXHIBIT 99.1 A10 Networks Reports Fourth Quarter and Full Year 2024 Financial Results Demand Recovery from Service Providers and Continued Execution in Enterprise Business SAN JOSE, Calif., February 4, 2025 - A10 Networks, Inc. (NYSE: ATEN or the “Company”), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its fourth quarter and full year ende

February 4, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 4, 2025 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

November 22, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2024 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission Fi

November 8, 2024 SC 13G/A

ATEN / A10 Networks, Inc. / SUMMIT PARTNERS L P - SC 13G/A Passive Investment

SC 13G/A 1 d827479dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 6)* A10 Networks, Inc. (Name of Issuer) Common Stock, par value $0.00001 per share (Title of Class of Securities) 002121101 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check

November 8, 2024 EX-99.A

Joint Filing Agreement

EX-99.A 2 d827479dex99a.htm EX-99.A EXHIBIT A Joint Filing Agreement Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of A10 Networks, Inc. This agreement may be executed in any n

November 7, 2024 EX-99.1

A10 Networks Reports Financial Results for the Third Quarter of 2024 Improving Demand from Service Providers and continued Enterprise Execution Drive Revenue Growth, Profitability

EXHIBIT 99.1 A10 Networks Reports Financial Results for the Third Quarter of 2024 Improving Demand from Service Providers and continued Enterprise Execution Drive Revenue Growth, Profitability SAN JOSE, Calif., November 7, 2024 - A10 Networks, Inc. (NYSE: ATEN or the "Company"), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its third quarte

November 7, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 7, 2024 Date of Report (Date of earliest event reported) A10 NETWORKS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 7, 2024 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

November 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 N

November 7, 2024 EX-99.2

Q3 2024 Financial Results & Commentary November 7, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, incl

Q3 2024 Financial Results & Commentary November 7, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, demand, positioning, capital allocation strategy and value creation, and market and technology trends.

July 30, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 30, 2024 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

July 30, 2024 EX-99.2

Q2 2024 Financial Results & Commentary July 30, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, includi

Q2 2024 Financial Results & Commentary July 30, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, demand, positioning, capital allocation strategy and value creation, and market and technology trends.

July 30, 2024 EX-99.1

A10 Networks Reports Financial Results for the Second Quarter of 2024 Company Maintains Solid Profitability

EXHIBIT 99.1 A10 Networks Reports Financial Results for the Second Quarter of 2024 Company Maintains Solid Profitability SAN JOSE, Calif., July 30, 2024 - A10 Networks, Inc. (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its second quarter ended June 30, 2024.  Second Quarter 2024 Financial Summary •Revenue of $60.1 million, co

July 30, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

May 29, 2024 EX-1.01

Conflict Minerals Report for the reporting period January 1, 202

Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2023 is provided in accordance with Rule 13p-1 (“Rule 13p-1,” published at 17 CFR § 240.13p-1) under the Securities Exchange Act of 1934 (the “1934 Act”), the in

May 29, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 2300 Orchard Parkway San Jose, CA 95131 (Address of pr

May 10, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 9, 2024 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (

May 3, 2024 EX-10.2

Form of Stock Option Agreement pursuant to the 2023 Stock Incentive Plan

1 A10 NETWORKS, INC. 2023 STOCK INCENTIVE PLAN NOTICE OF STOCK OPTION GRANT You have been granted the following Option (this “Option” or this “Award”) to purchase shares of Common Stock (“Stock”) of A10 Networks, Inc. (the “Company”) under the A10 Networks, Inc. 2023 Stock Incentive Plan (as may be amended from time to time, the “Plan”): Name of Optionee: [Name of Optionee] Grant Date: [Date of Gr

May 3, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

May 3, 2024 EX-10.4

Form of Restricted Stock Agreement pursuant to the 2023 Stock Incentive Plan

A10 NETWORKS, INC. 2023 STOCK INCENTIVE PLAN NOTICE OF RESTRICTED STOCK AWARD You have been granted the following restricted shares of Common Stock (the “Restricted Shares” or this “Award”) of A10 Networks, Inc. (the “Company”) under the A10 Networks, Inc. 2023 Stock Incentive Plan (as may be amended from time to time, the “Plan”): Name of Recipient: [Name of Recipient] Grant Date: [Date of Grant]

May 3, 2024 EX-10.3

Form of Restricted Stock Unit Agreement pursuant to the 2023 Stock Incentive Plan

A10 NETWORKS, INC. 2023 STOCK INCENTIVE PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted the following Restricted Stock Units (the “Restricted Stock Units”, “RSUs” or this “Award”) representing shares of Common Stock of A10 Networks, Inc. (the “Company”) under the A10 Networks, Inc. 2023 Stock Incentive Plan (as may be amended from time to time, the “Plan”): Name of Recipient: %%FI

April 30, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 30, 2024 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

April 30, 2024 EX-99.1

A10 Networks Reports In-line Financial Results for the First Quarter of 2024 Company Delivers Revenue Growth YoY and Expands Earnings Per Share

EXHIBIT 99.1 A10 Networks Reports In-line Financial Results for the First Quarter of 2024 Company Delivers Revenue Growth YoY and Expands Earnings Per Share SAN JOSE, Calif., April 30, 2024 - A10 Networks, Inc. (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its first quarter ended March 31, 2024. First Quarter 2024 Financial Su

April 30, 2024 EX-99.2

Q1 2024 Financial Results & Commentary April 30, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, includ

Q1 2024 Financial Results & Commentary April 30, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, demand, positioning, capital allocation strategy and value creation, and market and technology trends.

March 27, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

March 27, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

March 7, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1) (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-

February 29, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWORKS,

February 29, 2024 EX-97

A10 Networks, Inc. Policy for the Recovery of Erroneously Awarded Compensation

A10 NETWORKS, INC. EXECUTIVE COMPENSATION RECOUPMENT POLICY 1. Purpose The Board of Directors (the “Board”) of A10 Networks, Inc., a Delaware corporation (the “Company”), has adopted this Executive Compensation Recoupment Policy (this “Policy”) to comply with Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, as codified by Section 10D of the Securities Exchange

February 13, 2024 SC 13G/A

ATEN / A10 Networks, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0159-a10networksinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: A10 Networks Inc Title of Class of Securities: Common Stock CUSIP Number: 002121101 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the

February 7, 2024 SC 13G/A

ATEN / A10 Networks, Inc. / SUMMIT PARTNERS L P - SC 13G/A Passive Investment

SC 13G/A 1 d562183dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 5)* A10 Networks, Inc. (Name of Issuer) Common Stock, par value $0.00001 per share (Title of Class of Securities) 002121101 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check

February 6, 2024 EX-99.2

Q4 2023 Financial Results & Commentary February 6, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, incl

Q4 2023 Financial Results & Commentary February 6, 2024 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, demand, positioning, capital allocation strategy and value creation, and market and technology trends.

February 6, 2024 EX-99.1

A10 Networks Reports Financial Results for the Fourth Quarter of 2023 Company Achieves Revenue Guidance, Maintains Strong Profitability and Business Model

EXHIBIT 99.1 A10 Networks Reports Financial Results for the Fourth Quarter of 2023 Company Achieves Revenue Guidance, Maintains Strong Profitability and Business Model SAN JOSE, Calif., February 6, 2024 - A10 Networks, Inc. (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its fourth quarter ended December 31, 2023. Fourth Quarter

February 6, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 6, 2024 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

November 7, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 7, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

November 7, 2023 EX-99.2

Q3 2023 Financial Results & Commentary November 7, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, incl

Q3 2023 Financial Results & Commentary November 7, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, as well as market and technology trends.

November 7, 2023 EX-99.1

A10 Networks Reports Financial Results for the Third Quarter of 2023, In-Line with Preliminary Results Board Authorizes New Repurchase Plan Based on Sustained Business Performance

EXHIBIT 99.1 A10 Networks Reports Financial Results for the Third Quarter of 2023, In-Line with Preliminary Results Board Authorizes New Repurchase Plan Based on Sustained Business Performance SAN JOSE, Calif., November 7, 2023 - A10 Networks, Inc. (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its third quarter ended September

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 N

October 3, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 3, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizatio

October 3, 2023 EX-99.1

A10 Networks Reports Preliminary Third Quarter Financial Results Company to Release Final Results and Conduct Conference Call on November 7, 2023

EXHIBIT 99.1 A10 Networks Reports Preliminary Third Quarter Financial Results Company to Release Final Results and Conduct Conference Call on November 7, 2023 SAN JOSE, Calif., October 3, 2023 - A10 Networks (NYSE: ATEN), a leading provider of secure application services and solutions, today announced the following preliminary and unaudited results for the quarter ended September 30, 2023. A10 Net

September 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 30, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 30, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizatio

August 1, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

July 26, 2023 EX-99.1

A10 Networks Reports Revenue of $65.8 Million, EPS Expansion, for Second Quarter of 2023 Sequential Revenue Improvement Due to Durable Business Model; Company Generates $0.15 of GAAP EPS in Q2, $0.19 of Non-GAAP EPS

EXHIBIT 99.1 A10 Networks Reports Revenue of $65.8 Million, EPS Expansion, for Second Quarter of 2023 Sequential Revenue Improvement Due to Durable Business Model; Company Generates $0.15 of GAAP EPS in Q2, $0.19 of Non-GAAP EPS SAN JOSE, Calif., July 26, 2023 - A10 Networks (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its se

July 26, 2023 EX-99.2

Q2 2023 Financial Results & Commentary July 26, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, includi

atenq22023earningscallsl Q2 2023 Financial Results & Commentary July 26, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, as well as market and technology trends.

July 26, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 26, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 26, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

June 14, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 June 8, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 June 8, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

June 14, 2023 EX-16.1

Letter of Armanino LLP, dated June 1

a10networksformletter614 Armanino LLP 50 West San Fernando Street Suite 500 San Jose, CA 95113-2438 408 200 6400 main 408 200 6401 fax armanino.

May 24, 2023 EX-1.01

Conflict Minerals Report for the reporting period January 1, 202

EX-1.01 2 formsdexhibit101.htm EX-1.01 Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2022 is provided in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”),

May 24, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 2300 Orchard Parkway San Jose, CA 95131 (Address of pr

May 17, 2023 EX-FILING FEES

Filing Fee Table.

EXHIBIT 107.1 Calculation of Filing Fees FORM S-8 (Form Type) A10 NETWORKS, INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1)(2) Proposed Maximum Offering Price Per Share (3) Maximum Aggregate Offering Price (3) Fee Rate Amount of Registration Fee Equity Common Stock, par va

May 17, 2023 EX-4.1

2023 Stock Incentive Plan

a10-2023sipexhibit41 A10 NETWORKS, INC. 2023 STOCK INCENTIVE PLAN (Adopted by the Board of Directors on March 10, 2023) (Approved by the Stockholders on April 26, 2023) Effective Date: , 2023 A10 NETWORKS, INC. 2023 STOCK INCENTIVE PLAN i 4865-7304-3764.v9 TABLE OF CONTENTS Page SECTION 1. ESTABLISHMENT AND PURPOSE.............................................................. 1 SECTION 2. DEFINITI

May 17, 2023 S-8

As filed with the Securities and Exchange Commission on May 17, 2023

S-8 1 forms-85172023.htm S-8 As filed with the Securities and Exchange Commission on May 17, 2023 Registration No. 333- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 20-1446869 (State or other jurisdiction of incorporation or organization)

May 4, 2023 EX-99.1

A10 Networks Reports Revenue of $57.7 Million, Continued Strong Profitability for First Quarter of 2023 Management demonstrates durable and sustainable business model despite macro headwinds

EXHIBIT 99.1 A10 Networks Reports Revenue of $57.7 Million, Continued Strong Profitability for First Quarter of 2023 Management demonstrates durable and sustainable business model despite macro headwinds SAN JOSE, Calif., May 4, 2023 - A10 Networks (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its first quarter ended March 31,

May 4, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

May 4, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 4, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 4, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (

May 4, 2023 EX-99.2

Q1 2023 Financial Results & Commentary May 4, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including

atenq12023earningscallsl Q1 2023 Financial Results & Commentary May 4, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, as well as market and technology trends.

April 28, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 26, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 26, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

April 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 3, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 3, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

April 3, 2023 EX-99.1

A10 Networks Reports Preliminary First Quarter Financial Results, Reiterates Full-Year Earnings Guidance Company to Release Final Results and Conduct Conference Call on May 4, 2023

Exhibit 99.1 A10 Networks Reports Preliminary First Quarter Financial Results, Reiterates Full-Year Earnings Guidance Company to Release Final Results and Conduct Conference Call on May 4, 2023 SAN JOSE, Calif., April 3, 2023 - A10 Networks (NYSE: ATEN), a leading provider of secure application services and solutions, today announced the following preliminary and unaudited results for the quarter

March 30, 2023 DEFA14A

____________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendm

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. ) 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)) ☐ Defin

March 15, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

March 15, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

February 27, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWORKS,

February 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 21, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 21, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizat

February 9, 2023 SC 13G/A

ATEN / A10 Networks Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: A10 Networks Inc. Title of Class of Securities: Common Stock CUSIP Number: 002121101 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

February 7, 2023 EX-99.1

A10 Networks Reports Record Revenue, Full-Year Revenue of $280.3 Million, Fourth Quarter Revenue of $77.6 Million 12% Full-Year Revenue Growth Drives Record Profitability

EXHIBIT 99.1 A10 Networks Reports Record Revenue, Full-Year Revenue of $280.3 Million, Fourth Quarter Revenue of $77.6 Million 12% Full-Year Revenue Growth Drives Record Profitability SAN JOSE, Calif., February 7, 2023 - A10 Networks (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its fourth quarter and full-year period ended De

February 7, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 7, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

February 7, 2023 EX-99.2

Q4 2022 Financial Results & Commentary February 7, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’sbeliefs and assumptions, inclu

Q4 2022 Financial Results & Commentary February 7, 2023 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’sbeliefs and assumptions, including statements regarding our future financial performance, strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, as well as market and technology trends.

February 1, 2023 SC 13G/A

ATEN / A10 Networks Inc / SUMMIT PARTNERS L P - SC 13G/A Passive Investment

SC 13G/A 1 d254665dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 4)* A10 Networks, Inc. (Name of Issuer) Common Stock, par value $0.00001 per share (Title of Class of Securities) 002121101 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Chec

January 27, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 January 27, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 January 27, 2023 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

November 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 N

November 1, 2022 EX-99.2

Q3 2022 Financial Results & Commentary November 1, 2022 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’sbeliefs and assumptions, inclu

Q3 2022 Financial Results & Commentary November 1, 2022 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain ?forward-looking? statements that are based on our management?sbeliefs and assumptions, including statements regarding our future financial performance, strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, as well as market and technology trends.

November 1, 2022 EX-99.1

A10 Networks Reports Record Quarterly Revenue of $72.1 Million, up 10.2% Driven by Balanced Product, Customer and Regional Mix Product revenue growth of 13% and security-led solutions continue to drive growth; Company re-affirms full-year outlook, ra

EXHIBIT 99.1 A10 Networks Reports Record Quarterly Revenue of $72.1 Million, up 10.2% Driven by Balanced Product, Customer and Regional Mix Product revenue growth of 13% and security-led solutions continue to drive growth; Company re-affirms full-year outlook, raises dividend and announces new $50 million buyback SAN JOSE, Calif., November 1, 2022 - A10 Networks (NYSE: ATEN), a leading provider of

November 1, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 1, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

September 23, 2022 CORRESP

September 23, 2022

September 23, 2022 VIA EDGAR Ms. Brittany Ebbertt Ms. Christine Dietz United States Securities and Exchange Commission Division of Corporate Finance, Office of Technology 100 F Street, NE Washington, D.C. 20549 Re: A10 Networks, Inc. Form 10-K for the Fiscal Year ended December 31, 2021 Filed March 8, 2022 Form 10-Q for the quarterly period ended June 30, 2022 Filed on August 4, 2022 Form 8-K furn

September 9, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 September 8, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizat

September 9, 2022 EX-10.1

Common Stock Repurchase Agreement, dated as of September 8, 2022, between A10 Networks, Inc. and Summit Partners Growth Equity Fund VIII-A, L.P., Summit Partners Growth Equity Fund VIII-B L.P., Summit Investors I, LLC and Summit Investors I (UK), L.P.

4871-0502-9937.v2 COMMON STOCK REPURCHASE AGREEMENT THIS COMMON STOCK REPURCHASE AGREEMENT (the ?Agreement?) is entered into as of September 08, 2022, by and between A10 Networks, Inc., a Delaware corporation (the ?Company?), and those stockholders set forth on Exhibit A hereto (each. a ?Stockholder? and collectively, the ?Stockholders?). RECITALS WHEREAS, the Stockholders hold shares of the Compa

August 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

August 2, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 2, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

August 2, 2022 EX-99.1

A10 Networks Reports 14.9% Organic Growth for Q2 2022, Driven by Growth in Proprietary Security-Led Solutions Demand for security solutions drives 20.7% product revenue growth and 57.4% improvement in net income, enabling growth investments and the r

EXHIBIT 99.1 A10 Networks Reports 14.9% Organic Growth for Q2 2022, Driven by Growth in Proprietary Security-Led Solutions Demand for security solutions drives 20.7% product revenue growth and 57.4% improvement in net income, enabling growth investments and the return of $7.2 million to shareholders via buybacks and dividend Company reiterates full-year guidance SAN JOSE, Calif., August 2, 2022 -

August 2, 2022 EX-99.2

Q2 2022 Financial Results & Commentary August 2, 2022 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, includ

Q2 2022 Financial Results & Commentary August 2, 2022 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our future financial performance, strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, as well as market and technology trends.

June 27, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 June 24, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

May 25, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 2300 Orchard Parkway San Jose, CA 95131 (Address of pr

May 25, 2022 EX-1.01

Conflict Minerals Report for the reporting period January 1, 202

EX-1.01 2 exhibit101formsd5252022.htm EX-1.01 Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2021 is provided in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934

May 20, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 18, 2022 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission File Nu

May 11, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

May 11, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

May 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

May 3, 2022 EX-99.1

EXHIBIT 99.1 A10 Networks Reports 14% Organic Growth for Q1 2022, Driven by Security-Led Solutions Portfolio diversification enabled consistent and profitable growth, mitigating macro headwinds SAN JOSE, Calif., May 3, 2022 -- A10 Networks (NYSE: ATE

EXHIBIT 99.1 A10 Networks Reports 14% Organic Growth for Q1 2022, Driven by Security-Led Solutions Portfolio diversification enabled consistent and profitable growth, mitigating macro headwinds SAN JOSE, Calif., May 3, 2022 - A10 Networks (NYSE: ATEN), a leading provider of cybersecurity and infrastructure solutions, today announced financial results for its first quarter ended March 31, 2022. Fir

May 3, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 3, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (

May 3, 2022 EX-99.2

Q1 2022 Financial Results & Commentary May 3, 2022 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including

Q1 2022 Financial Results & Commentary May 3, 2022 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain ?forward-looking? statements that are based on our management?s beliefs and assumptions, including statements regarding our strategy, routes to market, technical differentiation, positioning, capital allocation strategy, expansion opportunities, growth, profitability, market growth, market and technology trends, expectations for the first quarter and half of 2022 and future years, including as to gross margins, EBITDA, revenue, investments, and our financial goals.

May 2, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 26, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

April 20, 2022 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1) (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-

April 19, 2022 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 19, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

March 8, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWORKS,

February 9, 2022 SC 13G/A

ATEN / A10 Networks Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: A10 Networks Inc. Title of Class of Securities: Common Stock CUSIP Number: 002121101 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??R

February 4, 2022 EX-99.A

POWER OF ATTORNEY

EXHIBIT A POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Adam H.

February 4, 2022 SC 13G/A

ATEN / A10 Networks Inc / SUMMIT PARTNERS L P - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* A10 Networks, Inc. (Name of Issuer) Common Stock, par value $0.00001 per share (Title of Class of Securities) 002121101 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the Appropriate Box to Designate the

February 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 1, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

February 1, 2022 EX-99.1

A10 Networks Reports 13% Organic Growth for Q4 2021, Driving Double-Digit Annual Growth Growth driven by cybersecurity and portfolio transformation; Management expects double digit growth in 2022 Company to discuss trends, differentiators and long-te

EXHIBIT 99.1 A10 Networks Reports 13% Organic Growth for Q4 2021, Driving Double-Digit Annual Growth Growth driven by cybersecurity and portfolio transformation; Management expects double digit growth in 2022 Company to discuss trends, differentiators and long-term outlook at Investor Day on February 2 SAN JOSE, Calif., February 1, 2022 - A10 Networks (NYSE: ATEN), a leading provider of cybersecur

January 31, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 January 25, 2022 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

November 3, 2021 SC 13D/A

ATEN / A10 Networks Inc / VIEX Capital Advisors, LLC Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2(a) (Amendment No. 8)1 A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 002121101 (CUSIP Number) ERIC SINGER VIEX Capital A

November 3, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 N

October 28, 2021 EX-99.2

Always Secure. Always Available. Q3 2021 Financial Results & Commentary Dhrupad Trivedi, CEO Brian Becker, CFO October 28, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” s

Always Secure. Always Available. Q3 2021 Financial Results & Commentary Dhrupad Trivedi, CEO Brian Becker, CFO October 28, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain ?forward-looking? statements that are based on our management?s beliefs and assumptions, including statements regarding our strategy, expectations for the fourth quarter

October 28, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 28, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

October 28, 2021 EX-99.1

A10 Networks Reports 15% Organic Growth for Q3 2021 Growth driven by cybersecurity and portfolio transformation; Management expects double-digit growth in Q4

EXHIBIT 99.1 A10 Networks Reports 15% Organic Growth for Q3 2021 Growth driven by cybersecurity and portfolio transformation; Management expects double-digit growth in Q4 SAN JOSE, Calif., October 28, 2021 - A10 Networks (NYSE: ATEN), a leading provider of secure application services and solutions, today announced financial results for its third quarter ended September 30, 2021. Third Quarter 2021

July 30, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

July 27, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 27, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

July 27, 2021 EX-99.2

Always Secure. Always Available. Q2 2021 Financial Results & Commentary Dhrupad Trivedi, CEO Brian Becker, CFO July 27, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” stat

Always Secure. Always Available. Q2 2021 Financial Results & Commentary Dhrupad Trivedi, CEO Brian Becker, CFO July 27, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain ?forward-looking? statements that are based on our management?s beliefs and assumptions, including statements regarding our strategy, margins, near term expectations, inclu

July 27, 2021 EX-99.1

A10 Networks Reports 12.7% Organic Growth for Q2 2021 Second Quarter GAAP EPS of $0.08, non-GAAP EPS of $0.13, Driven by Improving Commercial Execution and Favorable Market Conditions; Revenues in the third quarter expected to grow 7% - 12%

EXHIBIT 99.1 A10 Networks Reports 12.7% Organic Growth for Q2 2021 Second Quarter GAAP EPS of $0.08, non-GAAP EPS of $0.13, Driven by Improving Commercial Execution and Favorable Market Conditions; Revenues in the third quarter expected to grow 7% - 12% SAN JOSE, Calif., July 27, 2021 - A10 Networks (NYSE: ATEN), a leading provider of secure application services and solutions, today announced fina

May 19, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 2300 Orchard Parkway San Jose, CA 95131 (Address of pr

May 19, 2021 EX-1.01

Conflict Minerals Report for the reporting period January 1, 2020 through December 31, 2020

EX-1.01 2 exhibit101.htm EX-1.01 Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2020 is provided in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”), the in

May 5, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 29, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

April 30, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

April 27, 2021 EX-99.2

Always Secure. Always Available. Q1 2021 Financial Results & Commentary April 27, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our managemen

Always Secure. Always Available. Q1 2021 Financial Results & Commentary April 27, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain ?forward-looking? statements that are based on our management?s beliefs and assumptions, including statements regarding our positioning, global business environment, strategy, including portfolio management, re

April 27, 2021 EX-99.1

A10 Networks Reports Organic Growth, Expansion of Recurring Revenue and Security Solutions, driven by 5G and Cybersecurity, for Q1 2021 First Quarter GAAP EPS of $0.03, non-GAAP EPS of $0.12

EXHIBIT 99.1 A10 Networks Reports Organic Growth, Expansion of Recurring Revenue and Security Solutions, driven by 5G and Cybersecurity, for Q1 2021 First Quarter GAAP EPS of $0.03, non-GAAP EPS of $0.12 SAN JOSE, Calif., April 27, 2021 - A10 Networks (NYSE: ATEN), a leading provider of secure application services and solutions, today announced financial results for its first quarter ended March 3

April 27, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 27, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

March 17, 2021 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

March 17, 2021 DEF 14A

- DEF 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

March 17, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 March 12, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

March 11, 2021 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 March 10, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization

March 8, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWORKS,

February 19, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 16, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizat

February 10, 2021 SC 13G

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: A10 Networks Inc. Title of Class of Securities: Common Stock CUSIP Number: 002121101 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b) ☐ Rule

February 9, 2021 EX-99.2

Always Secure. Always Available. Q4 and FY 2020 Financial Results & Commentary February 9, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our

a10exhibit992v6 Always Secure. Always Available. Q4 and FY 2020 Financial Results & Commentary February 9, 2021 2 Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regardingour positioning, global business environment, strategy, including

February 9, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 9, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

February 9, 2021 EX-99.1

A10 Networks Reports Record GAAP Net Income of $7.8 Million for Fourth Quarter of 2020 Fourth Quarter GAAP EPS of $0.10, non-GAAP EPS of $0.18 and Full Year GAAP EPS of $0.22, non-GAAP EPS of $0.44; Full-Year 2020 Revenue Growth of 6% and Fourth Quar

EXHIBIT 99.1 A10 Networks Reports Record GAAP Net Income of $7.8 Million for Fourth Quarter of 2020 Fourth Quarter GAAP EPS of $0.10, non-GAAP EPS of $0.18 and Full Year GAAP EPS of $0.22, non-GAAP EPS of $0.44; Full-Year 2020 Revenue Growth of 6% and Fourth Quarter Cash Flow from Operations of $16.8 Million SAN JOSE, Calif., February 9, 2021 - A10 Networks (NYSE: ATEN), a leading provider of secu

February 8, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* A10 Networks Inc (Name of Issuer) Common Stock (Title of Class of Securities) 002121101 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

February 4, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G/A Information to be Included in Statements Filed Pursuant to Rules 13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to Rule 13d-2(b) Under the Securities

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G/A Information to be Included in Statements Filed Pursuant to Rules 13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to Rule 13d-2(b) Under the Securities Exchange Act of 1934 (Amendment No. 2)* A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 0

January 20, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 January 13, 2021 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

December 29, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 December 28, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizat

December 4, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 30, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizat

November 2, 2020 SC 13G/A

ATEN / A10 Networks, Inc. / CHEN LEE Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7)* A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value per share (Title of Class of Securities) 002121101 (CUSIP Number) October 30, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rul

October 30, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 N

October 27, 2020 EX-99.1

A10 Networks Reports 7.1% Revenue Growth for Third Quarter of 2020 Third Quarter Revenue of $56.6 Million; Record GAAP Net Income of $6.5 Million, Record GAAP EPS of $0.08, Record Non-GAAP Net Income of $10.3 Million, Record Non-GAAP EPS of $0.13 and

EX-99.1 2 atenq32020exhibit991.htm EX-99.1 EXHIBIT 99.1 A10 Networks Reports 7.1% Revenue Growth for Third Quarter of 2020 Third Quarter Revenue of $56.6 Million; Record GAAP Net Income of $6.5 Million, Record GAAP EPS of $0.08, Record Non-GAAP Net Income of $10.3 Million, Record Non-GAAP EPS of $0.13 and Cash Flow from Operations of $15.9 Million SAN JOSE, Calif., October 27, 2020 - A10 Networks

October 27, 2020 EX-99.2

Q3 2020 Financial Results & Commentary October 27, 2020 Always Secure. Always Available. Cautionary Statements & This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs

atenq32020exhibit992 Q3 2020 Financial Results & Commentary October 27, 2020 Always Secure.

October 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 27, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

October 23, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 19, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizati

October 2, 2020 8-K

Regulation FD Disclosure, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 2, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organizatio

October 1, 2020 SC 13G/A

ATEN / A10 Networks, Inc. / CHEN LEE Passive Investment

SC 13G/A 1 e619968sc13ga-a10.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6)* A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value per share (Title of Class of Securities) 002121101 (CUSIP Number) September 30, 2020 (Date of Event which Requires Filing of this Statement) Check the a

September 17, 2020 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 September 16, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organiza

September 17, 2020 EX-99.1

A10 Announces Positive Q3 Forecast from Continued Business Transformation; Board of Directors Authorizes $50 million Share Buyback

EXHIBIT 99.1 A10 Announces Positive Q3 Forecast from Continued Business Transformation; Board of Directors Authorizes $50 million Share Buyback Company expects Q3 revenue of $53-56M with continued sequential improvement in operating income and cash flow from operations Company announces CFO transition and schedules Third Quarter Earnings Results and Conference Call on October 27th SAN JOSE, Calif.

July 30, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

July 28, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 28, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

July 28, 2020 EX-99.1

A10 Networks Reports Second Quarter 2020 Financial Results Second Quarter Revenue of $52.5 Million; GAAP Net Income of $3.8 Million, GAAP EPS of $0.05, non-GAAP Net Income of $7.1 Million, non-GAAP EPS of $0.09 and Cash Flow from Operations of $10.5

EXHIBIT 99.1 A10 Networks Reports Second Quarter 2020 Financial Results Second Quarter Revenue of $52.5 Million; GAAP Net Income of $3.8 Million, GAAP EPS of $0.05, non-GAAP Net Income of $7.1 Million, non-GAAP EPS of $0.09 and Cash Flow from Operations of $10.5 Million SAN JOSE, Calif., July 28, 2020 - A10 Networks (NYSE: ATEN), a leading provider of secure application services and solutions, tod

July 28, 2020 EX-99.2

Q2 2020 Financial Results & Commentary July 28, 2020 Always Secure. Always Available. Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s

a10exhibit992 Q2 2020 Financial Results & Commentary July 28, 2020 Always Secure. Always Available. Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding market trends, the impact of COVID-19 on our business, including demand for our

July 21, 2020 8-K/A

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (AMENDMENT NO. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 27, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporati

July 9, 2020 EX-99.1

A10 Networks Provides Business Update and Second Quarter 2020 Expected Results

EXHIBIT 99.1 A10 Networks Provides Business Update and Second Quarter 2020 Expected Results Company Expects 5% Year over Year Revenue Growth, Sequential and Year over Year Improvement in operating income and cash flow from operations in excess of $9M Company to Announce Second Quarter Earnings Results and Host Investor Conference Call on July 28th SAN JOSE, Calif., July 9, 2020 - A10 Networks (NYS

July 9, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 9, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

May 28, 2020 SD

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 2300 Orchard Parkway San Jose, CA 95131 (Address of pr

May 28, 2020 EX-1.01

Conflict Minerals Report for the reporting period January 1, 2019 through December 31, 2019

Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2019 is provided in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”), the instructions to Form SD, and the Pu

May 28, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 27, 2020 Date of Report (Date of earliest event reported) A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation or organization) (Com

May 20, 2020 SC 13G/A

ATEN / A10 Networks, Inc. / CHEN LEE Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value per share (Title of Class of Securities) 002121101 (CUSIP Number) May 18, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pu

May 18, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K 1 form8-krelease51820.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 17, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of I

May 18, 2020 EX-10.1

Common Stock Repurchase and Option Exchange Agreement, dated as of May 17, 2020, between the Registrant and Lee Chen

EXHIBIT 10.1 COMMON STOCK REPURCHASE AND OPTION EXCHANGE AGREEMENT THIS COMMON STOCK REPURCHASE AND OPTION EXCHANGE AGREEMENT (the “Agreement”) is entered into as of May 17, 2020 by and between A10 Networks, Inc., a Delaware corporation (the “Company”), and Lee Chen (the “Stockholder”). RECITALS WHEREAS, the Stockholder is the holder of 9,873,424 shares of the Company’s common stock (the “Common S

May 8, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

May 7, 2020 EX-99.2

Q1 2020 Financial Results & Commentary May 7, 2020 Always Secure. Always Available. Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s b

a10investorpresent1q20ea Q1 2020 Financial Results & Commentary May 7, 2020 Always Secure.

May 7, 2020 EX-99.1

A10 Networks Reports First Quarter 2020 Financial Results First Quarter Revenue of $53.8 Million; Company Meets or Exceeds All Guidance Metrics

EXHIBIT 99.1 A10 Networks Reports First Quarter 2020 Financial Results First Quarter Revenue of $53.8 Million; Company Meets or Exceeds All Guidance Metrics SAN JOSE, Calif., May 7, 2020 - A10 Networks (NYSE: ATEN), a leading provider of intelligent and automated cybersecurity solutions, today announced financial results for its first quarter ended March 31, 2020. First Quarter 2020 Financial Summ

May 7, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 7, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Comm

April 15, 2020 DEF 14A

ATEN / A10 Networks, Inc. DEF 14A - - DEF 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

April 15, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 9, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (C

April 15, 2020 DEFA14A

ATEN / A10 Networks, Inc. DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

March 27, 2020 SC 13G/A

ATEN / A10 Networks, Inc. / CHEN LEE - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value per share (Title of Class of Securities) 002121101 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designa

March 12, 2020 8-K

Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission F

March 10, 2020 EX-4.3

Description of the Registrant’s securities

Exhibit 4.3 DESCRIPTION OF REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The following description of the common stock, par value $0.00001 per share (“Common Stock”) of A10 Networks, Inc. (the “Company”) is based upon the Company’s amended and restated certificate of incorporation (the “Certificate of Incorporation”), the Company’s amended and res

March 10, 2020 EX-10.4

Amended 2014 Employee Stock Purchase Plan

Exhibit 10.4 A10 NETWORKS, INC. 2014 EMPLOYEE STOCK PURCHASE PLAN (As amended October 22, 2018) 1.Purpose. The purpose of the Plan is to provide employees of the Company and its Designated Companies with an opportunity to purchase Common Stock through accumulated Contributions. The Company intends for the Plan to have two components: a Code Section 423 Component (“423 Component”) and a non-Code Se

March 10, 2020 10-K

ATEN / A10 Networks, Inc. 10-K - Annual Report - 10-KA10 NETWORKS,INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWORKS,

March 10, 2020 EX-21.1

List of subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Jurisdiction of Incorporation or Organization A10 Networks, Anguilla, Ltd. Anguilla A10 Networks (Australia) Pty Ltd. Australia A10 Networks Inc. (Beijing) China A10 Networks, Inc. - Taiwan Taiwan, Republic of China A10 Networks India Private Limited India A10 Networks Israel Ltd. Israel A10 Networks, KK Japan A10 Networks Limited United

February 18, 2020 SC 13G/A

ATEN / A10 Networks, Inc. / ALLIANCEBERNSTEIN L.P. - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* A10 Networks Inc (Name of Issuer) Common Stock (Title of Class of Securities) 002121101 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

February 11, 2020 EX-99.1

A10 NETWORKS, INC. CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited, in thousands, except per share amounts, on a GAAP Basis) Three Months Ended December 31, Twelve Months Ended December 31, 2019 2018 2019 2018 Revenue: Products $ 36,853 $

EXHIBIT 99.1 A10 Networks Reports Fourth Quarter 2019 Financial Results and First Quarter Outlook Fourth Quarter Revenue Grew 14% Sequentially, Above Prior Guidance GAAP Net Income and GAAP EPS Break-even Adjusted EBITDA of $10 Million, a Company Record Non-GAAP EPS of $0.10 Exceeds Prior Guidance Expects First Quarter Revenue Growth of 5% YoY at High End of Range SAN JOSE, Calif., February 11, 20

February 11, 2020 EX-99.2

Always Available, Always Secure INVESTOR PRESENTATION FEBRUARY 11, 2020 Reliable Security Always™ CAUTIONARY STATEMENTS & DISCLOSURES This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our

a10investorpresentation4 Always Available, Always Secure INVESTOR PRESENTATION FEBRUARY 11, 2020 Reliable Security Always™ CAUTIONARY STATEMENTS & DISCLOSURES This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our projections for our future operating results, our fo

February 11, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 11, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

February 6, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 3, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation) (Commission

January 28, 2020 SC 13G/A

ATEN / A10 Networks, Inc. / SUMMIT PARTNERS L P - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G/A Information to be Included in Statements Filed Pursuant to Rules 13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to Rule 13d-2(b) Under the Securities Exchange Act of 1934 (Amendment No. 1)* A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 0

January 7, 2020 EX-99.1

-2-

EX-99.1 2 d829862dex991.htm EX-99.1 Exhibit 99.1 A10 Networks Announces Preliminary Q4 results and Expects to Announce Fourth Quarter 2019 and Full Year 2019 results on February 11, 2020 Expected revenue results for fourth quarter of 2019 to be between $59 million and $60 million, above high end of guidance Fourth quarter and full year 2019 earnings announcement scheduled for February 11, 2020 SAN

January 7, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 6, 2020 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation) (Commission F

December 13, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 12, 2019 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation) (Commission

December 6, 2019 EX-3.1

Amended and Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on December 6, 2019)

EX-3.1 2 d761935dex31.htm EX-3.1 Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF A10 NETWORKS, INC. A10 Networks, Inc., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), certifies that: A. The name of the Corporation is A10 Networks, Inc. The Corporation’s Certificate of Incorporation was filed with the Secretary of State of the Stat

December 6, 2019 EX-3.2

Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed on December 6, 2019)

EX-3.2 3 d761935dex32.htm EX-3.2 Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF A10 NETWORKS, INC. Adopted March 21, 2014 Amended November 7, 2018 Amended January 8, 2019 Amended December 4, 2019 TABLE OF CONTENTS Page ARTICLE I — CORPORATE OFFICES 1 1.1 REGISTERED OFFICE 1 1.2 OTHER OFFICES 1 ARTICLE II — MEETINGS OF STOCKHOLDERS 1 2.1 PLACE OF MEETINGS 1 2.2 ANNUAL MEETING 1 2.3 SPECIAL MEETING 1 2.

December 6, 2019 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 4, 2019 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation) (Commission

November 21, 2019 EX-10.3

Form of CEO Change in Control and Severance Agreement

EX-10.3 Exhibit 10.3 A10 NETWORKS, INC. FORM OF CHANGE IN CONTROL AND SEVERANCE AGREEMENT This Change in Control and Severance Agreement (the “Agreement”) is made and entered into by and between Dhrupad Trivedi (“Executive”) and A10 Networks, Inc., a Delaware corporation (the “Company”), effective as of , 2019 (the “Effective Date”). RECITALS A. The Compensation Committee (the “Committee”) of the

November 21, 2019 SC 13D/A

ATEN / A10 Networks, Inc. / VIEX Capital Advisors, LLC - AMENDMENT NO. 7 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 7)1 A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 002121101 (CUSIP Number) ERIC SINGER VIEX CAPITAL A

November 21, 2019 EX-10.1

Letter Agreement, dated as of November 20, 2019, among A10 Networks, Inc., VIEX Opportunities Fund, LP – Series One, VIEX Opportunities Fund, LP – Series Two, VIEX GP, LLC, VIEX Special Opportunities Fund II, LP, VIEX Special Opportunities GP II, LLC, VIEX Special Opportunities Fund III, LP, VIEX Special Opportunities GP III, LLC, VIEX Capital Advisors, LLC and Eric Singer.

EX-10.1 2 d836919dex101.htm EX-10.1 Exhibit 10.1 A10 Networks, Inc. 3 West Plumeria Drive San Jose, CA 95134 November 20, 2019 VIEX Capital Advisors, LLC 745 Boylston Street, 3rd Floor Boston, MA 02116 Attn: Eric Singer Gentlemen: This letter (this “Agreement”) amends and restates that certain letter agreement dated as of July 26, 2019 between (a) A10 Networks, Inc. (“Company”) and (b) VIEX Capita

November 21, 2019 EX-10.2

Offer Letter, dated November 12, 2019, by and between the Registrant and Dhrupad Trivedi

EX-10.2 3 d836919dex102.htm EX-10.2 Exhibit 10.2 November 10, 2019 Mr. Dhrupad Trivedi Dear Dhrupad, I am pleased to confirm the offer for you to join A10 Networks, Inc. (the “Company”), in the position of Chief Executive Officer (CEO) at our Corporate Headquarters located in San Jose, CA. This is a full-time, regular position, reporting to the Board of Directors of the Company (the “Board”). The

November 21, 2019 EX-99.1

-2-

EX-99.1 Exhibit 99.1 A10 Networks Announces Dhrupad Trivedi as New CEO Founder Lee Chen Will Assist in Smooth Transition of Leadership Strategy Committee of the Board of Directors Continues to Review Strategic Alternatives Directed at Maximizing Shareholder Value SAN JOSE, Calif. – November 21, 2019 — A10 Networks (NYSE: ATEN), a leading provider of intelligent and automated cybersecurity solution

November 21, 2019 EX-10.1

Letter Agreement, dated as of November 20, 2019, among A10 Networks, Inc., VIEX Opportunities Fund, LP - Series One, VIEX GP, LLC, VIEX Special Opportunities Fund II, LP, VIEX Special Opportunities GP II, LLC, VIEX Capital Advisors, LLC and Eric Singer

EX-10.1 Exhibit 10.1 A10 Networks, Inc. 3 West Plumeria Drive San Jose, CA 95134 November 20, 2019 VIEX Capital Advisors, LLC 745 Boylston Street, 3rd Floor Boston, MA 02116 Attn: Eric Singer Gentlemen: This letter (this “Agreement”) amends and restates that certain letter agreement dated as of July 26, 2019 between (a) A10 Networks, Inc. (“Company”) and (b) VIEX Capital Advisors, LLC (“VIEX”) and

November 21, 2019 EX-99.1

A10 Networks, Inc. 3 West Plumeria Drive San Jose, CA 95134

EX-99.1 2 ex991to13da710114025111919.htm LETTER AGREEMENT, DATED NOVEMBER 20, 2019 Exhibit 99.1 A10 Networks, Inc. 3 West Plumeria Drive San Jose, CA 95134 November 20, 2019 VIEX Capital Advisors, LLC 745 Boylston Street, 3rd Floor Boston, MA 02116 Attn:Eric Singer Gentlemen: This letter (this “Agreement”) amends and restates that certain letter agreement dated as of July 26, 2019 between (a) A10

November 21, 2019 EX-10.2

Offer Letter, dated November 12, 2019, by and between the Registrant and Dhrupad Trivedi

EX-10.2 Exhibit 10.2 November 10, 2019 Mr. Dhrupad Trivedi Dear Dhrupad, I am pleased to confirm the offer for you to join A10 Networks, Inc. (the “Company”), in the position of Chief Executive Officer (CEO) at our Corporate Headquarters located in San Jose, CA. This is a full-time, regular position, reporting to the Board of Directors of the Company (the “Board”). The terms of our offer and the b

November 21, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 20, 2019 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation) (Commission

November 21, 2019 DEFA14A

ATEN / A10 Networks, Inc. DEFA14A - - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 20, 2019 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or other jurisdiction of incorporation) (Commission

November 21, 2019 EX-99.1

Press Release dated November 21, 2019

EX-99.1 Exhibit 99.1 A10 Networks Announces Dhrupad Trivedi as New CEO Founder Lee Chen Will Assist in Smooth Transition of Leadership Strategy Committee of the Board of Directors Continues to Review Strategic Alternatives Directed at Maximizing Shareholder Value SAN JOSE, Calif. – November 21, 2019 — A10 Networks (NYSE: ATEN), a leading provider of intelligent and automated cybersecurity solution

November 21, 2019 EX-10.3

Form of CEO Change in Control and Severance Agreement

EX-10.3 4 d836919dex103.htm EX-10.3 Exhibit 10.3 A10 NETWORKS, INC. FORM OF CHANGE IN CONTROL AND SEVERANCE AGREEMENT This Change in Control and Severance Agreement (the “Agreement”) is made and entered into by and between Dhrupad Trivedi (“Executive”) and A10 Networks, Inc., a Delaware corporation (the “Company”), effective as of , 2019 (the “Effective Date”). RECITALS A. The Compensation Committ

November 1, 2019 10-Q

ATEN / A10 Networks, Inc. 10-Q - Quarterly Report - 10-Q Q3 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 N

October 30, 2019 EX-99.2

Reliable Security Always Q3 2019 FINANCIAL RESULTS & COMMENTARY October 29, 2019 Reliable Security Always™ CAUTIONARY STATEMENTS & DISCLOSURES This presentation and the accompanying oral presentation contain “forward-looking” statements that are base

EX-99.2 3 exhibit992a10q319earning.htm Q3 2019 EARNINGS PRESENTATION Reliable Security Always Q3 2019 FINANCIAL RESULTS & COMMENTARY October 29, 2019 Reliable Security Always™ CAUTIONARY STATEMENTS & DISCLOSURES This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our

October 30, 2019 EX-99.1

A10 NETWORKS, INC. CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited, in thousands, except per share amounts) Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Revenue: Products $ 30,052 $ 38,265 $ 85,067 $

EX-99.1 2 q32019exhibit991pressrelea.htm EXHIBIT 99.1 EXHIBIT 99.1 A10 Networks Reports Third Quarter 2019 Financial Results and Fourth Quarter Outlook Third Quarter Revenue Grew 7% Sequentially, Above Midpoint of Prior Guidance Expects Fourth Quarter Sequential Revenue Growth of 8% at Midpoint of Range SAN JOSE, Calif., October 29, 2019 - A10 Networks (NYSE: ATEN), a leading provider of intellige

October 30, 2019 8-K

Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 29, 2019 A10 NETWORKS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization)

October 23, 2019 DEFA14A

ATEN / A10 Networks, Inc. DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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

October 23, 2019 DEF 14A

ATEN / A10 Networks, Inc. DEF 14A - - DEF 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

October 8, 2019 PRE 14A

ATEN / A10 Networks, Inc. PRE 14A - - PRE 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant o Check the appropriate box: ☒ Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

September 18, 2019 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 16, 2019 A10 NETWORKS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commissi

September 18, 2019 EX-16.1

Letter of Deloitte & Touche LLP, dated September 17, 2019

EX-16.1 Exhibit 16.1 September 17, 2019 Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-7561 Dear Sirs/Madams: We have read Item 4.01 of A10 Networks, Inc.’s Form 8-K dated September 17, 2019, and have the following comments: 1. We are in agreement with the statements made in paragraphs one through five of Item 4.01(a). 2. We have no basis on which to agree or disagree

August 19, 2019 SC 13D/A

ATEN / A10 Networks, Inc. / VIEX Capital Advisors, LLC - AMENDMENT NO. 6 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 6)1 A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 002121101 (CUSIP Number) ERIC SINGER VIEX CAPITAL A

August 2, 2019 10-Q

ATEN / A10 Networks, Inc. 10-Q - Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWOR

July 30, 2019 EX-99.2

Reliable Security Always Q2 2019 FINANCIAL RESULTS & COMMENTARY July 30, 2019 ATEN ?Q2 2019 Financial Results Conference Call ?Tuesday, July 30, 2019 1| Page

EX-99.2 Exhibit 99.2 Reliable Security Always Q2 2019 FINANCIAL RESULTS & COMMENTARY July 30, 2019 ATEN ?Q2 2019 Financial Results Conference Call ?Tuesday, July 30, 2019 1| Page Agenda Introduction Maria Riley, Investor Relations Results Overview Lee Chen, CEO, President and Founder Market Overview Chris White, EVP WW Sales Q2 2019 Financial Results & Business Outlook Tom Constantino, CFO Q&A: Le

July 30, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 26, 2019 A10 NETWORKS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation) (Commission Fi

July 30, 2019 EX-10.1

Letter Agreement, dated as of July 26, 2019, among A10 Networks, Inc., VIEX Opportunities Fund, LP – Series One, VIEX Opportunities Fund, LP – Series Two, VIEX GP, LLC, VIEX Special Opportunities Fund II, LP, VIEX Special Opportunities GP II, LLC, VIEX Special Opportunities Fund III, LP, VIEX Special Opportunities GP III, LLC, VIEX Capital Advisors, LLC and Eric Singer.

EX-10.1 Exhibit 10.1 A10 Networks, Inc. 3 West Plumeria Drive San Jose, CA 95134 July 26, 2019 VIEX Capital Advisors, LLC 745 Boylston Street, 3rd Floor Boston, MA 02116 Attn: Eric Singer Gentlemen: This letter (this “Agreement”) constitutes the agreement between (a) A10 Networks, Inc. (“Company”) and (b) VIEX Capital Advisors, LLC (“VIEX”) and each of the other related Persons (as defined below)

July 30, 2019 EX-99.1

A10 NETWORKS, INC. CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited, in thousands, except per share amounts) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Revenue: Products $ 26,785 $ 39,224 $ 55,015 $ 67,373 Ser

EX-99.1 3 d783692dex991.htm EX-99.1 Exhibit 99.1 DRAFTNOT FOR RELEASE A10 Networks Reports Second Quarter 2019 Financial Results and Company Update Announces Election of Eric Singer to the Board of Directors Announces Formation of Strategy Committee and Review of Strategic Alternatives Announces Search Committee Directed at Supporting CEO Succession SAN JOSE, Calif., July 30, 2019 — A10 Networks (

July 30, 2019 SC 13D/A

ATEN / A10 Networks, Inc. / VIEX Capital Advisors, LLC - EX. 99.1 - - LETTER AGREEMENT, DATED JULY 26, 2019 Activist Investment

begin 644 ex991to13da510114025073019.pdf M)5!$1BTQ+C4-)>+CS],-"CDT(# @;V)J#3P\+TQI;F5A%LY-" Q M.5TO26YF;R Y,R P(%(O3&5N9W1H(#4W+U!R978@,30V-3,V+U)O;[email protected]@ M,"!2+U-I>F4@,3$S+U1Y<&4O6%)E9B]76S$@,B Q73X^&3*P,3(\!8DR\!(-/&?,>\[ M0( ! 'O+!@-"F5N9'-T/\RFSM6'EBY(4O"4$/Z#>\:MD"F M8PP#A5?'S )L/ D+OM=N[.#0SBW*V''A;LB-$#,@[?L3W=72 HZ$##3$" M80=+1PXO"3\6!60O8%"XW[@8)&K&P*1= M#Z09@;@+B"T9F*S=('Q&%8 P P #N7#0I

July 30, 2019 SC 13D/A

ATEN / A10 Networks, Inc. / VIEX Capital Advisors, LLC - AMENDMENT NO. 5 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 5)1 A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 002121101 (CUSIP Number) ERIC SINGER VIEX Capital A

June 5, 2019 SC 13D/A

ATEN / A10 Networks, Inc. / VIEX Capital Advisors, LLC - AMENDMENT NO. 4 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 4)1 A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title of Class of Securities) 002121101 (CUSIP Number) ERIC SINGER VIEX CAPITAL A

June 4, 2019 SC 13D/A

ATEN / A10 Networks, Inc. / VIEX Capital Advisors, LLC - AMENDMENT NO. 3 TO THE SCHEDULE 13D Activist Investment

SC 13D/A 1 sc13da31011402506042019.htm AMENDMENT NO. 3 TO THE SCHEDULE 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 3)1 A10 Networks, Inc. (Name of Issuer) Common Stock, $0.00001 par value (Title

June 4, 2019 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 ex991to13da310114025060419.htm JOINT FILING AGREEMENT Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Common Stock, $0.0001 par

May 23, 2019 SD

ATEN / A10 Networks, Inc. SD - - SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report A10 NETWORKS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-36343 20-1446869 (State or Other Jurisdiction of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification Number) 3 West Plumeria Drive San Jose, CA 95134 (Address of p

May 23, 2019 EX-1.01

Conflict Minerals Report for the reporting period January 1, 2018 through December 31, 2018

EX-1.01 2 exhibit101cmr2018.htm EXHIBIT 1.01 Exhibit 1.01 Conflict Minerals Report of A10 Networks, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This Conflict Minerals Report of A10 Networks, Inc. (the “Company”, “us”, “our” or “we”) for calendar year 2018 is provided in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 A

May 8, 2019 EX-10.1

Sublease Agreement, dated May 2, 2019, by and between Marvell Corporation andA10 Networks, Inc.

EX-10.1 2 exhibit1012300orchardsub.htm EXHIBIT 10.1 SUBLEASE a ~ /~G~~C- 1. Parties. This Sublease ("Sublease") is entered into as of~T"~, 2019 ("Effective Date") by and between MARVELL SEMICONDUCTOR, INC., a California corporation ("Sublaudlord"), and A10 NETWORKS, 1NC., a Delaware corporation ("Subteaxant"), as a sublease under that certain Standard Lease (Single Tenant}, dated as of January 31,

May 8, 2019 10-Q

ATEN / A10 Networks, Inc. 10-Q Quarterly Report 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-36343 A10 NETWO

April 26, 2019 10-K/A

ATEN / A10 Networks, Inc. 10-K/A (Annual Report) 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1) (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR . ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 00

April 25, 2019 EX-99.2

ATEN – Q1 2019 Financial Results Conference Call – Thursday, Apr. 25, 2019 1 | Page Maria Thank you all for joining us today. This call is being recorded and webcast live and may be accessed for one year via the A10 Networks website, www.a10networks.

a10q119earningspresentat ATEN – Q1 2019 Financial Results Conference Call – Thursday, Apr.

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