8-K

A10 Networks, Inc. (ATEN)

8-K 2021-04-27 For: 2021-04-27
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

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) (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 April 27, 2021, A10 Networks, Inc. (the “Company”) issued a press release regarding financial results for the quarter ended March 31, 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 April 27, 2021, the Company posted on its website (www.a10networks.com) slides regarding the financial results for the quarter ended March 31, 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 dated April 27, 2021.
99.2 Slides of A10 Networks, Inc. dated April 27, 2021, regarding financial results of the first quarter ended March 31, 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: April 27, 2021

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

Document

EXHIBIT 99.1

image_01.jpg

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 31, 2021.

First Quarter 2021 Financial Summary

•Revenue of $54.8 million, up 2.0% year-over-year.

•Deferred revenue of $113.2 million, up 11.8% year-over-year.

•Security solutions grew to 60% of revenue and increased 15.5% on TTM basis.

•GAAP gross margin of 77.2%; non-GAAP gross margin of 78.9%.

•GAAP net income of $2.7 million, or $0.03 per share, compared with a net loss of $(297,000), or $(0.00) per share in the first quarter of 2020.

•Non-GAAP net income of $9.4 million, or $0.12 per share compared with non-GAAP net income of $4.0 million, or $0.05 per share in the first quarter of 2020.

•Adjusted EBITDA of $13.0 million, an improvement of $5.8 million compared with $7.2 million in the first quarter of 2020.

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

“We made significant progress in the first quarter against our stated goal of growing recurring revenue, and continued increasing security solutions revenue as a percent of total revenue,” said Dhrupad Trivedi, President and Chief Executive Officer of A10 Networks. “Our best-in-class security solutions are increasingly well-received by the market, and demand for network security solutions is growing. Software now represents more than 10% of our total revenue in the first quarter, compared to 6% for the full-year of 2020 and just 4% in 2019. Our stated goal was to grow recurring revenue faster than our consolidated revenue, giving us greater predictability into our quarterly revenues and enhancing the financial leverage we have built into our business model. As expected, we saw a decline in our Japan revenue related to the timing of the Olympics, but our strong book-to-bill performance in the quarter of 1.2:1 supports our full-year growth outlook for Japan. We were able to offset this temporary weakness with strong, improving performance in the Americas.”

“Over the past two years, we have maintained discipline in our cost structure while continuing to invest in growth initiatives,” continued Trivedi. “This enabled us to deliver more than $10.8 million in non-GAAP operating income versus $4.1 million in the first quarter last year and a loss of $5.9 million just two years ago, strengthening our balance sheet by growing cash and cash equivalents to $161 million, or approximately $2.02 per diluted share, and no debt. We now have an efficient, focused organization and we are positioned to increase investment in sales, marketing and R&D to facilitate growth in line with our business model. Security solutions grew 15.5% year-over-year on a trailing-12-month basis, and these solutions are creating strong momentum to expand our business going forward in addition to driving recurring revenue. With compelling offerings and powerful catalysts driving demand for our solution, we are well-positioned for a solid 2021.”

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 first 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 10155102.

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, 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 10, 2020. 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<br><br>March 31,
2021 2020
Revenue:
Products $ 30,540 $ 30,736
Services 24,303 23,028
Total revenue 54,843 53,764
Cost of revenue:
Products 7,086 6,941
Services 5,413 5,201
Total cost of revenue 12,499 12,142
Gross profit 42,344 41,622
Operating expenses:
Sales and marketing 19,092 20,621
Research and development 13,981 15,315
General and administrative 5,247 5,895
Total operating expenses 38,320 41,831
Income (loss) from operations 4,024 (209)
Non-operating income (expense):
Interest and other income (expense), net (1,183) 231
Total non-operating income (expense), net (1,183) 231
Income (loss) before provision for income taxes 2,841 22
Provision for income taxes 184 319
Net income (loss) $ 2,657 $ (297)
Net income (loss) per share:
Basic $ 0.03 $
Diluted $ 0.03 $
Weighted-average shares used in computing net income (loss) per share:
Basic 76,704 78,061
Diluted 79,636 78,061

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME (LOSS) TO NON-GAAP NET INCOME (LOSS)

(unaudited, in thousands, except per share amounts)

Three Months Ended<br><br>March 31,
2021 2020
GAAP net income (loss) $ 2,657 $ (297)
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 4,620 3,241
Amortization expense related to acquisition 253 253
Litigation and investigation expense 30
Non-recurring facilities expense 795
Global distribution center transition expense 1,911
Non-GAAP net income $ 9,441 $ 4,022
GAAP net income per share:
Basic $ 0.03 $
Diluted $ 0.03 $
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 0.06 0.04
Amortization expense related to acquisition
Litigation and investigation expense
Non-recurring facilities expense 0.01
Global distribution center transition expense 0.03
Non-GAAP net income (loss) per share:
Basic $ 0.12 $ 0.05
Diluted $ 0.12 $ 0.05
Weighted-average shares used in computing non-GAAP net income per share:
Basic 76,704 78,061
Diluted 79,636 79,747

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands, except par value, on a GAAP Basis)

March 31, 2021 December 31, 2020
ASSETS
Current assets:
Cash and cash equivalents $ 75,696 $ 83,281
Marketable securities 85,261 74,851
Accounts receivable, net of allowances of $4 and $41, respectively 51,449 51,051
Inventory 19,547 20,730
Prepaid expenses and other current assets 13,022 12,390
Total current assets 244,975 242,303
Property and equipment, net 8,223 7,888
Goodwill 1,307 1,307
Intangible assets, net 502 862
Other non-current assets 36,573 38,451
Total assets $ 291,580 $ 290,811
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable $ 4,521 $ 4,851
Accrued liabilities 26,198 36,930
Deferred revenue 68,299 65,999
Total current liabilities 99,018 107,780
Deferred revenue, non-current 44,920 42,700
Other non-current liabilities 22,983 24,357
Total liabilities 166,921 174,837
Commitments and contingencies
Stockholders' equity:
Common stock, $0.00001 par value: 500,000 shares authorized; 77,102 and 76,346 shares issued and outstanding, respectively 1 1
Treasury stock, 5,587 and 5,578 shares, respectively (37,498) (37,410)
Additional paid-in-capital 431,738 425,534
Accumulated other comprehensive income 10 98
Accumulated deficit (269,592) (272,249)
Total stockholders' equity 124,659 115,974
Total liabilities and stockholders' equity $ 291,580 $ 290,811

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands, on a GAAP Basis)

Three Months Ended<br><br>March 31,
2021 2020
Cash flows from operating activities:
Net income (loss) $ 2,657 $ (297)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization 2,413 3,311
Stock-based compensation 4,399 3,040
Other non-cash items 181 (13)
Changes in operating assets and liabilities:
Accounts receivable (315) 10,767
Inventory 1,086 1,472
Prepaid expenses and other assets (60) 2,426
Accounts payable (501) (3,718)
Accrued and other liabilities (12,106) (4,919)
Deferred revenue 4,519 114
Net cash provided by operating activities 2,273 12,183
Cash flows from investing activities:
Proceeds from sales of marketable securities 1,300 1,914
Proceeds from maturities of marketable securities 24,140 10,175
Purchases of marketable securities (36,197) (5,518)
Purchases of property and equipment (769) (868)
Net cash provided by (used in) investing activities (11,526) 5,703
Cash flows from financing activities:
Proceeds from issuance of common stock under employee equity incentive plans 1,756 2,005
Repurchase of common stock (88)
Net cash provided by financing activities 1,668 2,005
Net increase (decrease) in cash and cash equivalents (7,585) 19,891
Cash and cash equivalents—beginning of period $ 83,281 $ 45,742
Cash and cash equivalents—end of period $ 75,696 $ 65,633
Non-cash investing and financing activities:
Inventory transfers to property and equipment $ 97 $ 149
Purchases of property and equipment included in accounts payable $ 172 $ 63

A10 NETWORKS, INC.

RECONCILIATION OF GAAP GROSS PROFIT TO NON-GAAP GROSS PROFIT

(unaudited, in thousands, except percentages)

Three Months Ended<br><br>March 31,
2021 2020
GAAP gross profit $ 42,344 $ 41,622
GAAP gross margin 77.2 % 77.4 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 641 501
Global distribution center transition expense 273
Non-GAAP gross profit $ 43,258 $ 42,123
Non-GAAP gross margin 78.9 % 78.3 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP TOTAL OPERATING EXPENSES TO

TO NON-GAAP TOTAL OPERATING EXPENSES

(unaudited, in thousands)

Three Months Ended<br><br>March 31,
2021 2020
GAAP total operating expenses $ 38,320 $ 41,831
Non-GAAP adjustments:
Stock-based compensation and related payroll tax (3,979) (2,740)
Amortization expense related to acquisition (253) (253)
Litigation and investigation expense (30)
Non-recurring facilities expense (795)
Global distribution center transition expense (1,638)
Non-GAAP total operating expenses $ 32,450 $ 38,013

A10 NETWORKS, INC.

RECONCILIATION OF GAAP INCOME (LOSS) FROM OPERATIONS

TO NON-GAAP OPERATING INCOME (LOSS)

(unaudited, in thousands, except percentages)

Three Months Ended<br><br>March 31,
2021 2020
GAAP income (loss) from operations $ 4,024 $ (209)
GAAP operating margin 7.3 % (0.4) %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 4,620 3,241
Amortization expense related to acquisition 253 253
Litigation and investigation expense 30
Non-recurring facilities expense 795
Global distribution center transition expense 1,911
Non-GAAP operating income $ 10,808 $ 4,110
Non-GAAP operating margin 19.7 % 7.6 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME (LOSS) TO

EBITDA AND ADJUSTED EBITDA (NON-GAAP)

(unaudited, in thousands)

Three Months Ended<br><br>March 31,
2021 2020
GAAP net income (loss) $ 2,657 $ (297)
Exclude: Interest and other (income) expense, net 1,183 (231)
Exclude: Depreciation and amortization expense 2,413 3,311
Exclude: Provision for income taxes 184 319
EBITDA 6,437 3,102
Exclude: Stock-based compensation and related payroll tax 4,620 3,241
Exclude: Litigation and investigation expense 30
Exclude: Non-recurring facilities expense 795
Exclude: Global distribution center transition expense 1,911
Adjusted EBITDA $ 12,968 $ 7,168

a10investorpresentation1

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, recurring revenue, growth and profitability. 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 April 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 • Q1 Overview • Q1 Financial Performance


4 A10 at a Glance Enabling a Secure and Available Digital World IoT Proliferation Shift to Cloud 5G Deployment Operational Complexity Security Threats Protect investments for enterprises and service providers Support seamless migration to the cloud and cloud- native with hybrid solutions Secure multi- generational networks through the transition to 5G and cloud Protect networks from cyberattacks that threaten network availability Simplify IT ops with connected intel, automation, ML and DevOps/ SecOps tools Provide always available application delivery and security on-prem and in the cloud $225M 2020 ANNUAL REVENUE 78.8% Q1’21 NON-GAAP GROSS MARGIN $161M CASH & MARKETABLE SECURITIES AS OF 3/31/21 $113M DEFERRED REV AS OF 3/31/21 7,800+ CUSTOMERS $0 DEBT


5 Q1’21: Building on our Successes • Accelerating recurring revenue • Recurring revenue increased 8% year-over-year • Deferred revenue reaches a record $113.2 million, up approximately 12% year-over-year • Record profitability • Quarterly operating expenses reduced by approximately $5.6 million, or approximately 15% year-over-year • Q1 operating income improved by $6.7 million, or approximately 163% year-over-year • Adjusted EBITDA improved by $5.8 million, or 81% year-over-year • Continued execution in a challenging economic environment • Year-over-year growth for: • Revenue • Net Income • Adjusted EBITDA • Diluted EPS


6 Near-term Expectations • Increasing focus on higher growth portfolio • Deliver integrated solutions that drive established strengths in cybersecurity, 5G, network availability • Grow recurring revenue faster than overall revenue growth • Guidance • Targeting sustainable growth of 6-8% annually with expectation to maintain GAAP profitability going forward • Management expects sequential growth in each remaining quarter of 2021


7 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 $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 $2.2 $21.4 $22.1 $23.0 $24.4 $22.9 $23.4 $23.4 $24.8 $23.7 $25.5 $28.2 $28.4 $25.6 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 Exiting 2021 Support Subscription $120.0 $ Millions


8 Quarterly Revenue & Non-GAAP Operating Income Operating Profit is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. $53.8 $52.5 $56.6 $62.7 $54.8 Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 Revenue, $ Millions $4.1 $7.2 $10.0 $13.9 $10.8 Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 Non-GAAP Operating Income, $ Millions $53.8 $54.8 Q1'20 Q1'21 Revenue, $ Millions $4.1 $10.8 Q1'20 Q1'21 Non-GAAP Operating Income, $ Millions


9 62% 38% Q1’21 $54.8 million Quarterly Revenue by Customer Vertical 65.1% 57.9% 59.5% 60.0% 62.0% 34.9% 42.1% 40.5% 40.0% 38.0% Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 Enterprise Service Provider


10 Quarterly Revenue by Geography 47% 46% 39% 43% 48% 33% 24% 32% 30% 25% 9% 15% 15% 13% 12% 11% 15% 14% 15% 16% Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 $ Millions Americas Japan APAC ex Japan EMEA 48% 25% 12% 16% Q1’21 $54.8 million


11 Quarterly Revenue & Non-GAAP Operating Income Operating Profit is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. $53.8 $54.8 Q1'20 Q1'21 Revenue, $ Millions $4.1 $10.8 Q1'20 Q1'21 Non-GAAP Operating Income, $ Millions


12 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 Revenue $50.3 $49.2 $52.8 $60.3 $212.6 $53.8 $52.5 $56.6 $62.7 $225.5 $54.8 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% 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% 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 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 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


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 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% 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% 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% 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% 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% EPS $ - GAAP (0.16)$ (0.08)$ 0.00$ 0.00$ (0.23)$ (0.00)$ 0.05$ 0.08$ 0.10$ 0.22$ 0.03$ 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 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 Global distribution center transition expense - - - - - - - - 0.04 0.04 0.03 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$


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 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$ 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 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 Global distribution center transition expense - - - - - - - - 2.9 2.9 1.9 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$ % 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 % 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 % 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 % Global distribution center transition expense —% —% —% —% —% —% —% —% 4.6 % 1.3 % 3.5 % 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 %


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 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$ 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 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 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 EBITDA (8.5) (3.9) 2.7 2.7 (7.1) 3.1 6.7 8.9 10.3 29.0 6.4 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 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 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$


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