8-K

A10 Networks, Inc. (ATEN)

8-K 2021-07-27 For: 2021-07-27
View Original
Added on April 04, 2026

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) (Commission File Number) (I.R.S. Employer Identification Number)

2300 Orchard Parkway

San Jose, CA 95131

(Address of principal executive offices, including zip code)

(408) 325-8668

(Name and telephone number, including area code, of the person to contact in connection with this report)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

____________________________________________________________________________

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading symbol(s) Name of each exchange on which registered
Common stock, $0.00001 par value per share ATEN New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02    Results of Operations and Financial Condition

On July 27, 2021, A10 Networks, Inc. (the “Company”) issued a press release regarding financial results for the quarter ended June 30, 2021. A copy of the press release is attached as Exhibit 99.1 and the information in Exhibit 99.1 is incorporated herein by reference.

Item 7.01    Regulation FD Disclosure

On July 27, 2021, the Company posted on its website (www.a10networks.com) slides regarding the financial results for the quarter ended June 30, 2021. A copy of the slides is attached as Exhibit 99.2 and the information in Exhibit 99.2 is incorporated herein by reference.

The information in Item 2.02, Item 7.01 and Item 9.01 in this Current Report on Form 8-K and the exhibits attached hereto shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Item 9.01    Financial Statements and Exhibits

(d) Exhibits

Exhibit Description
99.1 Press release datedJuly27, 2021.
99.2 Slides of A10 Networks, Inc. datedJuly27, 2021, regarding financial results of thesecondquarter endedJune30, 2021.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 27, 2021

A10 NETWORKS, INC.
By: /s/ Brian Becker
Brian Becker
Chief Financial Officer (Principal Accounting and Financial Officer)

Document

EXHIBIT 99.1

image_0.jpg

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 financial results for its second quarter ended June 30, 2021.

Second Quarter 2021 Financial Summary

•Revenue of $59.2 million, up 12.7% year-over-year.

•Improving commercial execution combined with favorable market conditions drove 20% growth in the Americas year-over-year; Japan normalized as expected.

•Deferred revenue of $116.3 million, up 10.8% year-over-year.

•GAAP gross margin of 77.0%; non-GAAP gross margin of 77.9% as the company navigated short-term input cost pressures.

•GAAP net income of $6.6 million, or $0.08 per diluted share, compared with net income of $3.8 million, or $0.05 per diluted share in the second quarter of 2020.

•Non-GAAP net income of $10.5 million, or $0.13 per diluted share compared with non-GAAP net income of $7.1 million, or $0.09 per diluted share in the second quarter of 2020.

•Adjusted EBITDA of $13.2 million compared to $9.8 million in the second quarter of 2020.

A reconciliation between GAAP and non-GAAP information is contained in the financial statements below.

“Our focus on customer-centric product innovation and on driving improvements in commercial execution is beginning to deliver results, with consolidated revenue growing double-digits in the second quarter and EBITDA growing faster than that rate,” said Dhrupad Trivedi, President and Chief Executive Officer of A10 Networks. “We gained market share, adding new customers and expanding our security-led sales with existing customers. As expected, Japan again grew year-over-year during the quarter. Our customer engagements, strength of funnel and improving execution reinforce our confidence in full year growth targets while building a diversified customer base for the future.”

“We continue to deliver on our strategic goal to deliver leading innovative solutions to the market,” continued Trivedi. “We grew product revenue, which is a leading indicator of future recurring revenue, by 17.6% year-over-year. Year-to-date, recurring revenue has grown faster than our consolidated revenue, and our deferred revenue reached an all-time high, demonstrating our ability to sell differentiated solutions that are meeting the security challenges of today’s world. The growth, combined with an increasingly favorable sales mix, greater contribution of recurring revenue and discipline related to our cost structure is driving significant expansion of our profitability. Our GAAP net income nearly doubled on 12.7% revenue growth, and we generated more than $17.2 million in cash from operating activities during the quarter.”

Based on improved visibility, management today provided guidance for the third quarter. Management now expects third quarter revenue of $60.6 to $63.4 million, with the bottom-line growing at a faster rate than the top-line.

Conference Call Information

A10 Networks will host a conference call today at 4:30 p.m. Eastern time / 1:30 p.m. Pacific time for analysts and investors to discuss its second quarter 2021 financial results. Open to the public, interested parties may access the conference call by dialing (844) 792-3728 or (412) 317-5105. A live audio webcast of the conference call will be accessible from the “Investor Relations” section of A10 Network’s website at investors.a10networks.com. The webcast will be archived for at least 90 days. A telephonic replay of the conference call will be available two hours after the conclusion of the live call and will run for seven business days and may be accessed by dialing (877) 344-7529 or (412) 317-0088 and entering the passcode 10158446.

Forward-Looking Statements

This press release contains “forward-looking statements,” including statements regarding our strategic focus, demand for our solutions, revenue predictability, financial leverage, growth outlook for Japan, investment in growth initiatives and sales, marketing and R&D, revenue growth and targets, profitability, our customer base and positioning, and our expectations with respect to revenue for the third quarter, including recurring revenue, and our positioning. Forward-looking statements are subject to known and unknown risks and uncertainties and are based on assumptions that may prove to be incorrect, which could cause actual results to differ materially from those expected or implied by the forward-looking statements. Factors that may cause actual results to differ include the impact of the COVID-19 pandemic, and its impact on the timing of customer orders and product shipments; members of our management team or a significant number of our global employee base becoming ill with COVID-19; changes in government regulations and mandates to address COVID-19 that may adversely impact our ability to continue to operate without disruption; a significant decline in global macroeconomic conditions that have an adverse impact on our business and financial results; challenges to our infrastructure because of the number of employees working from remote locations; business interruptions related to our supply chain; our ability to manage our business and expenses if customers cancel or delay orders; execution risks related to closing key deals and improving our execution; the continued market adoption of our products; our ability to successfully anticipate market needs and opportunities; our timely development of new products and features; our

ability to achieve or maintain profitability; any loss or delay of expected purchases by our largest end-customers; our ability to maintain or improve our competitive position; competitive and execution risks related to cloud-based computing trends; our ability to attract and retain new end-customers and our largest end-consumers; our ability to maintain and enhance our brand and reputation, changes demanded by our customers in the deployment and payment model for our products; continued growth in markets relating to network security; the success of any future acquisitions or investments in complementary companies, products, services or technologies; the ability of our sales team to execute well; our ability to shorten our close cycles; the ability of our channel partners to sell our products; variations in product mix or geographic locations of our sales; risks associated with our presence in international markets; weaknesses or deficiencies in our internal control over financial reporting; our ability to timely file periodic reports required to be filed under the Securities Exchange Act of 1934; and other risks that are described in “Risk Factors” in our periodic filings with the Securities and Exchange Commission, including our Form 10-K filed with the Securities and Exchange Commission on March 8, 2021. We do not intend to update or alter our forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.

Non-GAAP Financial Measures

In addition to disclosing financial measures prepared in accordance with U.S. generally accepted accounting principles (GAAP), this press release and the accompanying tables contain certain non-GAAP financial measures, including non-GAAP net income (loss), non-GAAP net income (loss) per basic and diluted share, non-GAAP gross profit and gross margin, non-GAAP operating income (loss) and operating margin, non-GAAP operating expenses, and Adjusted EBITDA. Non-GAAP financial measures do not have any standardized meaning and are therefore unlikely to be comparable to similarly titled measures presented by other companies.

A10 Networks considers these non-GAAP financial measures to be important because they provide useful measures of the operating performance of the company, exclusive of unusual events or factors that do not directly affect what we consider to be our core operating performance, and are used by the company's management for that purpose.

Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with GAAP.

We define non-GAAP net income as our GAAP net income (loss) excluding: (i) stock-based compensation and related payroll tax, (ii) amortization expense related to acquisition, (iii) non-recurring expenses associated with the litigation settlement and internal investigation expense, (iv) global distribution center transition expense, and (v) non-recurring facilities expense. We define non-GAAP net income per basic and diluted share as our non-GAAP net income (loss) divided by our basic and diluted weighted-average shares outstanding.  We define non-GAAP gross profit as our GAAP gross profit excluding (i) stock-based compensation and related payroll tax, and (ii) global distribution center transition expense. We define non-GAAP gross margin as

our non-GAAP gross profit divided by our GAAP revenue. We define non-GAAP operating income (loss) as our GAAP income (loss) from operations excluding (i) stock-based compensation and related payroll tax, (ii) amortization expense related to acquisition, (iii) non-recurring expenses associated with the litigation settlement and internal investigation expense, (iv) global distribution center transition expense, and (v) non-recurring facilities expense. We define non-GAAP operating margin as our non-GAAP operating income (loss) divided by our GAAP revenue. We define non-GAAP operating expenses as our GAAP operating expenses excluding (i) stock-based compensation and related payroll tax, (ii) amortization expense related to acquisition, (iii) non-recurring expenses associated with the litigation settlement and internal investigation expense, (iv) global distribution center transition expense, and (v) non-recurring facilities expense. We define Adjusted EBITDA as our GAAP net income (loss) excluding (i) interest expense (if any), (ii) interest income and other (income) expense, net, (iii) depreciation and amortization expense, (iv) provision for income taxes, (v) stock-based compensation and related payroll tax, (vi) litigation settlement and internal investigation expense, (vii) global distribution center transition expense, and (viii) non-recurring facilities expense.

We have included our non-GAAP net income (loss), non-GAAP gross profit and gross margin, non-GAAP operating income (loss) and operating margin, non-GAAP operating expenses and Adjusted EBITDA in this press release. Non-GAAP financial measures are presented for supplemental informational purposes only for understanding the company's operating results.

About A10 Networks

A10 Networks (NYSE: ATEN) provides secure application services and solutions for on-premises, multi-cloud and edge-cloud environments at hyperscale. Our mission is to enable service providers and enterprises to deliver business-critical applications that are secure, available and efficient for multi-cloud transformation and 5G readiness. We deliver better business outcomes that support investment protection, new business models and help future-proof infrastructures, empowering our customers to provide the most secure and available digital experience. Founded in 2004, A10 Networks is based in San Jose, Calif. and serves customers globally. For more information, visit https://www.a10networks.com/ and follow us @A10Networks.

The A10 logo and A10 Networks are trademarks or registered trademarks of A10 Networks, Inc. in the United States and other countries. All other trademarks are the property of their respective owners.

Investor Contact:

Rob Fink

FNK IR

646.809.4048

aten@fnkir.com

Brian Becker

Chief Financial Officer

investors@a10networks.com

Source: A10 Networks, Inc.

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited, in thousands, except per share amounts, on a GAAP Basis)

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
Revenue:
Products $ 34,363 $ 29,214 $ 64,903 $ 59,950
Services 24,805 23,286 49,108 46,314
Total revenue 59,168 52,500 114,011 106,264
Cost of revenue:
Products 8,215 6,544 15,301 13,485
Services 5,415 4,878 10,828 10,079
Total cost of revenue 13,630 11,422 26,129 23,564
Gross profit 45,538 41,078 87,882 82,700
Operating expenses:
Sales and marketing 19,749 18,476 38,841 39,097
Research and development 13,491 13,450 27,472 28,765
General and administrative 5,082 5,237 10,329 11,132
Total operating expenses 38,322 37,163 76,642 78,994
Income from operations 7,216 3,915 11,240 3,706
Non-operating income (expense):
Interest and other income (expense), net (112) 227 (1,295) 458
Total non-operating income (expense), net (112) 227 (1,295) 458
Income before provision for income taxes 7,104 4,142 9,945 4,164
Provision for income taxes 488 334 672 653
Net income $ 6,616 $ 3,808 $ 9,273 $ 3,511
Net income per share:
Basic $ 0.09 $ 0.05 $ 0.12 $ 0.04
Diluted $ 0.08 $ 0.05 $ 0.12 $ 0.04
Weighted-average shares used in computing net income per share:
Basic 76,774 78,178 76,745 78,119
Diluted 79,316 79,982 79,501 79,930

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO NON-GAAP NET INCOME

(unaudited, in thousands, except per share amounts)

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
GAAP net income $ 6,616 $ 3,808 $ 9,273 $ 3,511
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 2,612 3,075 7,232 6,316
Amortization expense related to acquisition 252 253 505 506
Litigation and investigation expense 30
Non-recurring facilities expense 795
Global distribution center transition expense 1,036 2,947
Non-GAAP net income $ 10,516 $ 7,136 $ 19,957 $ 11,158
GAAP net income per share:
Basic $ 0.09 $ 0.05 $ 0.12 $ 0.04
Diluted $ 0.08 $ 0.05 $ 0.12 $ 0.04
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 0.04 0.04 0.09 0.08
Amortization expense related to acquisition 0.00 0.00 0.01 0.01
Litigation and investigation expense 0.00
Non-recurring facilities expense 0.01
Global distribution center transition expense 0.01 0.04
Non-GAAP net income per share:
Basic $ 0.14 $ 0.09 $ 0.26 $ 0.14
Diluted $ 0.13 $ 0.09 $ 0.25 $ 0.14
Weighted-average shares used in computing non-GAAP net income per share:
Basic $ 76,774 $ 78,178 $ 76,745 $ 78,119
Diluted $ 79,316 $ 79,982 $ 79,501 $ 79,930

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands, on a GAAP Basis)

June 30,<br><br>2021 December 31,<br><br>2020
ASSETS
Current assets:
Cash and cash equivalents $ 67,949 $ 83,281
Marketable securities 98,860 74,851
Accounts receivable, net of allowances of $193 and $41, respectively 50,219 51,051
Inventory 19,084 20,730
Prepaid expenses and other current assets 14,523 12,390
Total current assets 250,635 242,303
Property and equipment, net 9,148 7,888
Goodwill 1,307 1,307
Intangible assets, net 141 862
Other non-current assets 34,907 38,451
Total assets $ 296,138 $ 290,811
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable $ 5,661 $ 4,851
Accrued liabilities 27,763 36,930
Deferred revenue 69,918 65,999
Total current liabilities 103,342 107,780
Deferred revenue, non-current 46,409 42,700
Other non-current liabilities 21,882 24,357
Total liabilities 171,633 174,837
Commitments and contingencies
Stockholders' equity:
Common stock, $0.00001 par value: 500,000 shares authorized; 76,554 and 76,346 shares issued and outstanding, respectively 1 1
Treasury stock, at cost: 6,825 and 5,578 shares, respectively (48,623) (37,410)
Additional paid-in-capital 436,112 425,534
Accumulated other comprehensive income (loss) (9) 98
Accumulated deficit (262,976) (272,249)
Total stockholders' equity 124,505 115,974
Total liabilities and stockholders' equity $ 296,138 $ 290,811

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands, on a GAAP Basis)

Six Months Ended June 30,
2021 2020
Cash flows from operating activities:
Net income $ 9,273 $ 3,511
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization 4,753 6,096
Stock-based compensation 6,891 6,009
Other non-cash items 531 (423)
Changes in operating assets and liabilities:
Accounts receivable 882 8,442
Inventory 1,499 (92)
Prepaid expenses and other assets (1,200) 2,662
Accounts payable 821 (776)
Accrued and other liabilities (11,642) (6,610)
Deferred revenue 7,628 3,834
Net cash provided by operating activities 19,436 22,653
Cash flows from investing activities:
Proceeds from sales of marketable securities 2,865 3,160
Proceeds from maturities of marketable securities 48,586 16,549
Purchases of marketable securities (76,141) (12,982)
Purchases of property and equipment (2,443) (1,549)
Net cash provided by (used in) investing activities (27,133) 5,178
Cash flows from financing activities:
Proceeds from issuance of common stock under employee equity incentive plans 3,578 5,609
Repurchase of common stock (11,213) (13,336)
Net cash used in financing activities (7,635) (7,727)
Net increase (decrease) in cash and cash equivalents (15,332) 20,104
Cash and cash equivalents—beginning of period $ 83,281 $ 45,742
Cash and cash equivalents—end of period $ 67,949 $ 65,846

A10 NETWORKS, INC.

RECONCILIATION OF GAAP GROSS PROFIT TO NON-GAAP GROSS PROFIT

(unaudited, in thousands, except percentages)

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
GAAP gross profit $ 45,538 $ 41,078 $ 87,882 $ 82,700
GAAP gross margin 77.0 % 78.2 % 77.1 % 77.8 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 303 298 944 799
Global distribution center transition expense 252 525
Non-GAAP gross profit $ 46,093 $ 41,376 $ 89,351 $ 83,499
Non-GAAP gross margin 77.9 % 78.8 % 78.4 % 78.6 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP TOTAL OPERATING EXPENSES TO

TO NON-GAAP TOTAL OPERATING EXPENSES

(unaudited, in thousands)

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
GAAP total operating expenses $ 38,322 $ 37,163 $ 76,642 $ 78,994
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 2,309 2,777 6,288 5,517
Amortization expense related to acquisition 252 253 505 506
Litigation and investigation expense 30
Non-recurring facilities expense 795
Global distribution center transition expense 784 2,422
Non-GAAP total operating expenses $ 34,977 $ 34,133 $ 67,427 $ 72,146

A10 NETWORKS, INC.

RECONCILIATION OF GAAP INCOME FROM OPERATIONS

TO NON-GAAP OPERATING INCOME

(unaudited, in thousands, except percentages)

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
GAAP income from operations $ 7,216 $ 3,915 $ 11,240 $ 3,706
GAAP operating margin 12.2 % 7.5 % 9.9 % 3.5 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 2,612 3,075 7,232 6,316
Amortization expense related to acquisition 252 253 505 506
Litigation and investigation expense 30
Non-recurring facilities expense 795
Global distribution center transition expense 1,036 2,947
Non-GAAP operating income $ 11,116 $ 7,243 $ 21,924 $ 11,353
Non-GAAP operating margin 18.8 % 13.8 % 19.2 % 10.7 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO

EBITDA AND ADJUSTED EBITDA (NON-GAAP)

(unaudited, in thousands)

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
GAAP net income $ 6,616 $ 3,808 $ 9,273 $ 3,511
Exclude: Interest and other (income) expense, net 112 (227 ) 1,295 (458 )
Exclude: Depreciation and amortization expense 2,340 2,785 4,753 6,096
Exclude: Provision for income taxes 488 334 672 653
EBITDA 9,556 6,700 15,993 9,802
Exclude: Stock-based compensation and related payroll tax 2,612 3,075 7,232 6,316
Exclude: Litigation and investigation expense 30
Exclude: Non-recurring facilities expense 795
Exclude: Global distribution center transition expense 1,036 2,947
Adjusted EBITDA $ 13,204 $ 9,775 $ 26,172 $ 16,943

a10investorpresentation2

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, including a continued focus on a higher growth portfolio, growth and profitability expectations, expectations for the third quarter of 2021, including as to revenue, and recurring revenue expectations. Forward-looking statements are subject to known and unknown risks, uncertainties, assumptions and other factors that could cause our actual results to differ materially from those anticipated or implied by our forward-looking statements. These factors include, but are not limited to, the impact of the COVID-19 pandemic on our business, on the business of our customers and suppliers, and on the global economy in general, execution risks related to closing key deals and improving our execution, successfully executing our strategies, market adoption of our products, successfully anticipating market needs and opportunities, timely development of new products and features, achieving or maintaining profitability, loss or delay of expected purchases, our ability to maintain or improve our competitive position; competitive and execution risks related to cloud-based computing trends, attracting and retaining new end-customers, maintaining and enhancing our brand and reputation, changes demanded by our customers in the deployment and payment model for our products, growth in markets relating to network security, the success of any future acquisitions or investments, the success of our partnerships with technology providers, the ability of our sales team to execute well, our ability to shorten our close cycle, the ability of our channel partners to sell our products, variations in product mix or geographic locations of our sales, our presence in international markets, and other factors described in our quarterly reports on Form 10-Q, annual reports on Form 10-K and other filings made with the Securities and Exchange Commission, to which your attention is directed. The forward-looking statements included in this presentation are based on current expectations and beliefs as of July 27, 2021 only. We do not intend to update this information contained in the forward-looking statements, except as required by law. This presentation and the accompanying oral presentation also include certain non-GAAP financial measures including Non-GAAP gross margin, non-GAAP operating income, non-GAAP net income, non-GAAP operating margin, Adjusted EBITDA and Non-GAAP EPS. Non-GAAP financial measures do not have any standardized meaning and are therefore unlikely to be comparable to similarly titles measures presented by other companies. A10 Networks considers these non-GAAP financial measures to be important because they provide useful measures of the operating performance of the company, exclusive of unusual events or factors that do not directly affect what we consider to be our core operating performance, and are used by the company’s management for that purpose. Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with GAAP. We define non-GAAP net income as our GAAP net income (loss) excluding: (i) stock-based compensation and related payroll tax, (ii) amortization expense related to acquisition, (iii) non-recurring expenses associated with the litigation settlement and internal investigation expense, (iv) global distribution center transition expense, and (v) non-recurring facility expense. We define non-GAAP net income per basic and diluted share as our non-GAAP net income (loss) divided by our basic and diluted weighted-average shares outstanding. We define non-GAAP gross profit as our GAAP gross profit excluding (i) stock-based compensation and related payroll tax, and (ii) global distribution center transition expense. We define non-GAAP gross margin as our non-GAAP gross profit divided by our GAAP revenue. We define non-GAAP operating income (loss) as our GAAP income (loss) from operations excluding (i) stock-based compensation and related payroll tax, (ii) amortization expense related to acquisition, (iii) non- recurring expenses associated with the litigation settlement and internal investigation expense, (iv) global portfolio rationalization expense, and (v) non-recurring facilities expense. We define non- GAAP operating margin as our non-GAAP operating income (loss) divided by our GAAP revenue. We define non-GAAP operating expenses as our GAAP operating expenses excluding (i) stock-based compensation and related payroll tax, (ii) amortization expense related to acquisition, (iii) non-recurring expenses associated with the litigation settlement and internal investigation expense, (iv) global distribution center transition expense, and (v) non-recurring facilities expense. We define Adjusted EBITDA as our GAAP net income (loss) excluding (i) interest expense (if any), (ii) interest income and other (income) expense, net, (iii) depreciation and amortization expense, (iv) provision for income taxes, (v) stock-based compensation and related payroll tax, (vi) litigation settlement and internal investigation expense, (vii) global distribution center transition expense, and (viii) non-recurring facility expense. A reconciliation between GAAP and non-GAAP financial measures can be found in the appendix to this document and in the accompany financial results press release.


3 Agenda ▪ Introduction ▪ Q2 Overview ▪ Q2 Financial Performance


4 Key Financials A10 At-a-Glance $225M 2020 ANNUAL REVENUE $24M TRAILING 12-MONTH NET INCOME (GAAP) $167M CASH & MARKETABLE SECURITIES AS OF 6/30/21 $0 DEBT 77.9% Q2’21 NON-GAAP GROSS MARGIN $116M DEFERRED REV AS OF 6/30/21 Large installed base and best-in-class solutions aligned with secular tailwinds • Delivering solutions for managing data growth with integrated security • Geographically diversified with a global presence • Directly aligned with trends in cybersecurity, 5G and cloud supporting investment protection as well as new buildouts Experienced management team driving continued business transformation • Built upon leadership position in technology • Integrated product platform with focus on recurring revenue, security-led solutions • Evolving to support new consumption models and hybrid environments Driving investor returns though improved business model and strategy for sustainable growth • Returned to high-margin organic growth in 2020 along with productivity • Targeting 20%+ EBITDA margins after multiple quarters of positive GAAP net income including through COVID-19 challenges • $19.6M remaining on $50M buyback (as of 6/30/21)


5 Q2’21: Strong Execution, Capturing Share • Growth and diversification • Revenue grew 12.7% YoY • Recurring revenue increased 7% year-over-year; YTD recurring revenue growth outpacing consolidated revenue • Deferred revenue reaches a record $116.3 million • Record profitability • Quarterly net income nearly doubled • Adjusted EBITDA improved by $3.4 million, or 35% year-over-year • Continued execution in a challenging economic environment • Significantly Improved commercial execution in North America • Japan returns to year-over-year growth as expected


6 Quarterly Recurring Revenue $20.3 $20.9 $21.8 $21.7 $21.1 $21.2 $21.7 $22.4 $22.2 $22.5 $23.6 $24.1 $23.4 $23.8 $31.0 $1.1 $1.2 $1.2 $2.7 $1.8 $2.2 $1.7 $2.4 $1.5 $3.0 $4.6 $4.3 $2.3 $3.3 $21.4 $22.1 $23.0 $24.4 $22.9 $23.4 $23.4 $24.8 $23.7 $25.5 $28.2 $28.4 $25.7 Q1'18 Q2'18 Q3'18 Q4'18 Q1'19 Q2'19 Q3'19 Q4'19 Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 Q2'21 Exiting 2021 Support Subscription $120.0 $ Millions $27.1 $120.0


7 Quarterly Revenue & Non-GAAP Operating Income Operating Profit is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. $52.5 $56.6 $62.7 $54.8 $59.2 Q2'20 Q3'20 Q4'20 Q1'21 Q2'21 Revenue, $ Millions $7.2 $10.0 $13.9 $10.8 $11.1 Q2'20 Q3'20 Q4'20 Q1'21 Q2'21 Non-GAAP Operating Income, $ Millions $52.5 $59.2 Q2'20 Q2'21 Revenue, $ Millions $7.2 $11.1 Q2'20 Q2'21 Non-GAAP Operating Income, $ Millions


8 61% 39% Q2’21 $59.2 million Quarterly Revenue by Customer Vertical 57.9% 59.5% 60.0% 62.0% 60.9% 42.1% 40.5% 40.0% 38.0% 39.1% Q2'20 Q3'20 Q4'20 Q1'21 Q2'21 Enterprise Service Provider


9 Quarterly Revenue by Geography 47% 46% 39% 43% 48% 49% 33% 24% 32% 30% 25% 26% 9% 15% 15% 13% 12% 13% 11% 15% 14% 15% 16% 12% Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 Q2'21 $ Millions Americas Japan APAC ex Japan EMEA 49% 26% 13% 12% Q2’21 $59.2 million


10 Quarterly Revenue & Non-GAAP Operating Income Operating Profit is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. $52.5 $59.2 Q2'20 Q2'21 Revenue, $ Millions $7.2 $11.1 Q2'20 Q2'21 Non-GAAP Operating Income, $ Millions


11 Financial Performance Trends Numbers may not sum due to rounding. Please refer to the supplemental financials posted in the “Investor Relations” section of the A10 Networks website at investors.a10networks.com Gross Margin %, Operating Margin %, Adjusted EBITDA and EPS are Non-GAAP Financial Measures. See Appendix for reconciliation to most comparable GAAP financial measures. $ Millions (except EPS) Q1'19 Q2'19 Q3’19 Q4'19 FY 2019 Q1’20 Q2’20 Q3’20 Q4’20 FY2020 Q1’21 Q2’21 Revenue $50.3 $49.2 $52.8 $60.3 $212.6 $53.8 $52.5 $56.6 $62.7 $225.5 $54.8 $59.2 Non-GAAP Gross Margin % 76.3% 78.0% 78.1% 78.5% 77.8% 78.3% 78.8% 77.6% 79.6% 78.6% 78.9% 77.9% Non-GAAP Operating Margin % (11.8%) (1.9%) 3.5% 12.7% 1.2% 7.7% 13.8% 17.8% 22.1% 15.6% 19.7% 18.8% Adjusted EBITDA (non-GAAP) ($3.7) $1.3 $4.0 $10.0 $11.6 $7.2 $9.8 $12.5 $16.1 $45.6 $13.0 $13.2 Non-GAAP EPS ($0.10) $0.00 $0.02 $0.10 $0.03 $0.05 $0.09 $0.13 $0.18 $0.44 $0.12 $0.13 Ending Cash & Marketable Securities $122.8 $119.3 $122.6 $129.9 $129.9 $142.9 $143.4 $159.1 $158.1 $158.1 $161.0 $166.8


12 • Revenue of $60.6 to $63.4 million • We expect to grow our bottom-line faster than our top line Q3'2021 Outlook


13 Appendix


14 GAAP to Non-GAAP — Gross Margin and EPS Numbers may not sum due to rounding. EPS data is presented on a basic and diluted basis. Please refer to the supplemental financials posted the “Investor Relations” section of the A10 Networks website at investors.a10networks.com. % of Revenue except EPS Q1'19 Q2'19 Q3'19 Q4'19 FY 2019 Q1'20 Q2'20 Q3'20 Q4'20 FY 2020 Q1'21 Q2'21 Gross Margin % - GAAP 75.6% 77.1% 77.4% 77.7% 77.0% 77.4% 78.2% 76.8% 78.5% 77.8% 77.2% 77.0% Stock-based compensation 0.6% 1.0% 0.6% 0.8% 0.7% 0.9% 0.6% 0.8% 0.6% 0.7% 1.2% 0.5% Global distribution center transition expense 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.5% 0.1% 0.5% 0.4% Non-reccuring facilities expense 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Gross Margin % - Non-GAAP 76.3% 78.0% 78.1% 78.5% 77.8% 78.3% 78.8% 77.6% 79.6% 78.6% 78.9% 77.9% EPS $ - GAAP (0.16)$ (0.08)$ 0.00$ 0.00$ (0.23)$ (0.00)$ 0.05$ 0.08$ 0.10$ 0.22$ 0.03$ 0.08$ Stock-based compensation 0.05 0.07 0.04 0.05 0.21 0.04 0.04 0.05 0.04 0.16 0.06 0.03 Litigation and Investigation expense (recovery) 0.01 0.00 (0.03) 0.00 (0.01) 0.00 - - - 0.00 - - Amortization expense related to acquisition 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.01 0.00 0.00 Global distribution center transition expense - - - - - - - - 0.04 0.04 0.03 0.02 Restructuring expense, and related tax - - - 0.03 0.03 - - - - - - - Non-recurring facilities expense - - - 0.01 0.01 0.01 - - - 0.01 - - EPS $ - Non-GAAP (0.10)$ 0.00$ 0.02$ 0.10$ 0.03$ 0.05$ 0.09$ 0.13$ 0.18$ 0.44$ 0.12$ 0.13$


15 GAAP to Non-GAAP — Operating Income (Loss) Numbers may not sum due to rounding. Please refer to the supplemental financials posted the “Investor Relations” section of the A10 Networks website at investors.a10networks.com. $ Millions Q1'19 Q2'19 Q3'19 Q4'19 FY 2019 Q1'20 Q2'20 Q3'20 Q4'20 FY 2020 Q1'21 Q2'21 Income (loss) from operations $ - GAAP (11.0)$ (6.4)$ 0.2$ 0.1$ (17.1)$ (0.2)$ 3.9$ 6.2$ 7.8$ 17.7$ 4.0$ 7.2$ Stock-based compensation 3.9 5.0 3.5 4.3 16.8 3.2 3.1 3.6 2.9 12.8 4.6 2.6 Litigation and Investigation expense (recovery) 0.9 0.2 (2.2) 0.0 (1.1) 0.0 - - - 0.0 - - Amortization expense related to acquisition 0.3 0.3 0.3 0.3 1.0 0.3 0.3 0.3 0.3 1.0 0.3 0.3 Global distribution center transition expense - - - - - - - - 2.9 2.9 1.9 1.0 Restructuring expense - - - 2.5 2.5 - - - - - - - Non-recurring facilities expense - - - 0.4 0.4 0.8 - - - 0.8 - - Income (loss) from operations $ - Non-GAAP (5.9)$ (0.9)$ 1.8$ 7.7$ 2.6$ 4.1$ 7.2$ 10.0$ 13.9$ 35.3$ 10.8$ 11.1$ % of Revenue Income (loss) from operations % - GAAP (21.8)% (13.1)% 0.4 % 0.1 % (8.0)% (0.4)% 7.5 % 11.0 % 12.4 % 7.9 % 7.3 % 12.2 % Stock-based compensation 7.7 % 10.3 % 6.6 % 7.2 % 7.9 % 6.0 % 5.9 % 6.3 % 4.7 % 5.7 % 8.4 % 4.4 % Litigation and Investigation expense (recovery) 1.7 % 0.4 % (4.1)% 0.1 % (0.5)% 0.1 % —% —% —% 0.0 % —% —% Amortization expense related to acquisition 0.5 % 0.5 % 0.5 % 0.4 % 0.5 % 0.5 % 0.5 % 0.4 % 0.4 % 0.4 % 0.5 % 0.4 % Global distribution center transition expense —% —% —% —% —% —% —% —% 4.6 % 1.3 % 3.5 % 1.8 % Restructuring expense —% —% —% 4.2 % 1.2 % —% —% —% —% —% —% —% Non-recurring facilities expense —% —% —% 0.7 % 0.2 % 1.5 % —% —% —% 0.4 % —% —% Income (loss) from operations % - Non-GAAP (11.8)% (1.9)% 3.5 % 12.7 % 1.2 % 7.7 % 13.8 % 17.8 % 22.1 % 15.6 % 19.7 % 18.8 %


16 GAAP to Non-GAAP — Adjusted EBITDA Numbers may not sum due to rounding. Please refer to the supplemental financials posted the “Investor Relations” section of the A10 Networks website at investors.a10networks.com. $ Millions Q1'19 Q2'19 Q3'19 Q4'19 FY 2019 Q1'20 Q2'20 Q3'20 Q4'20 FY 2020 Q1'21 Q2'21 GAAP net income (loss) (12.3)$ (5.8)$ 0.2$ 0.1$ (17.8)$ (0.3)$ 3.8$ 6.5$ 7.8$ 17.8$ 2.7$ 6.6$ Exclude: Interest expense 0.2 0.0 0.0 0.0 0.2 - 0.0 - - 0.0 - - Exclude: Interest income and other (income) expense, net 0.6 (0.8) (0.3) (0.5) (0.9) (0.2) (0.2) (0.5) (0.5) (1.4) 1.2 0.1 Exclude: Depreciation & amortization expense 2.4 2.5 2.5 2.6 10.0 3.3 2.8 2.7 2.5 11.3 2.4 2.3 Exclude: Provision for income taxes 0.5 0.1 0.3 0.5 1.4 0.3 0.3 0.3 0.4 1.3 0.2 0.5 EBITDA (8.5) (3.9) 2.7 2.7 (7.1) 3.1 6.7 8.9 10.3 29.0 6.4 9.6 Exclude: Stock-based compensation 3.9 5.0 3.5 4.3 16.8 3.2 3.1 3.6 2.9 12.8 4.6 2.6 Exclude: Litigation settlement and investigation expense 0.9 0.2 (2.2) 0.0 (1.1) 0.0 - - - 0.0 - - Exclude: Global distribution center transition expense - - - - - - - - 2.9 2.9 1.9 1.0 Exclude: Restructuring expense - - - 2.5 2.5 - - - - - - - Exclude: Non-recurring facilities expense - - - 0.4 0.4 0.8 - - - 0.8 - - Adjusted EBITDA - Non-GAAP (3.7)$ 1.3$ 4.0$ 10.0$ 11.6$ 7.2$ 9.8$ 12.5$ 16.1$ 45.6$ 13.0$ 13.2$


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