8-K

A10 Networks, Inc. (ATEN)

8-K 2023-11-07 For: 2023-11-07
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

November 7, 2023

Date of Report (Date of earliest event reported)

____________________________________________________________________________

A10 Logo JPEG.jpg

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 November 7, 2023, A10 Networks, Inc. (the “Company”) issued a press release regarding financial results for the quarter ended September 30, 2023. A copy of the press release is furnished herewith as Exhibit 99.1.

Item 7.01    Regulation FD Disclosure

On November 7, 2023, the Company posted on its website (www.a10networks.com) slides regarding the financial results for the quarter ended September 30, 2023. 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. The information in Item 2.02 shall not be incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 8.01    Other Events.

On November 7, 2023, the Company announced that its Board of Directors (the “Board”) declared a quarterly dividend. The quarterly dividend, in the amount of $0.06 per share, will be payable, subject to any prior revocation, on December 1, 2023 to stockholders of record on November 17, 2023. Future dividends will be subject to further review and approval by the Board in accordance with applicable law. The Board reserves the right to adjust or withdraw the quarterly dividend in future periods as it reviews A10’s capital allocation strategy from time-to-time.

In addition, the Board authorized a new, $50 million share repurchase program under which the Company may repurchase up to $50 million of its outstanding common stock during the next 12 months. Under the share repurchase program, the Company is authorized to repurchase shares of common stock in the open market, privately negotiated transactions, in block trades or a combination of the foregoing. The Board will review the share repurchase program periodically and may authorize adjustment of its term and size. The Company plans to fund repurchases from its existing cash balance.

Forward Looking Statements

Item 8.01 contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act, including statements regarding the Company’s dividend program. These forward-looking statements involve risks and uncertainties. These forward-looking statements may be identified by terms such as “will,” “may,” “plans,” or the negative of these terms, and similar expressions intended to identify forward-looking statements. These forward-looking statements include, but are not limited to, statements regarding the anticipated amount, duration, methods, timing and other aspects of our dividend program and any anticipated benefits or value resulting from any such dividends. These statements involve known and unknown risks, uncertainties and other factors which may cause actual results, performance or achievements to differ materially from those expressed or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to, any unforeseen need for capital which may require us to divert funds we may have otherwise used for the dividend program, which may in turn negatively impact our ability to administer the quarterly dividends. In addition, the timing and amount of future dividends, if any, will be made as management deems appropriate and will depend on a variety of factors including stock price, market conditions, corporate and regulatory requirements (including applicable securities laws and regulations and the rules of The New York Stock Exchange), any additional constraints related to material inside information the Company may possess, and capital availability. More information regarding these and other risks, uncertainties and factors is contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, as filed with the SEC, and in other reports filed by the Company with the SEC from time to time. You are cautioned not to unduly

rely on these forward-looking statements, which speak only as of the date of this press release. All information in this press release and its attachments is as of the date stated and unless required by law, The Company undertakes no obligation to publicly revise any forward-looking statement to reflect circumstances or events after the date of this press release or to report the occurrence of unanticipated events other than as required by law or regulation.

Item 9.01    Financial Statements and Exhibits

(d) Exhibits

Exhibit Description
99.1 Press release datedNovemberq3ex-99111072023earningsre.htm7, 2023.
99.2 Slides of A10 Network, Inc. datedNovemberatenq32023earningscallsl.htm7, 2023, regarding financial results of thethirdquarter endedSeptember30, 2023.

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: November 7, 2023

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

Document

EXHIBIT 99.1

a10logo.jpg

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 30, 2023.

Third Quarter 2023 Financial Summary

•Revenue of $57.8 million, in-line with preliminary expectations and down $14.3 million year-over-year due to delays related to North American service provider customers' capital expenditures.

•Enterprise revenue up 7% year-over-year.

•GAAP gross margin of 80.9%; non-GAAP gross margin of 81.8% as a result of continued focus on operational execution of business model goals in spite of near-term volatility in the market.

•GAAP net income of $6.5 million (representing 11.2% of revenue), or $0.09 per diluted share. Year-to-date, GAAP net income was $22.1 million (12.2% of revenue), or $0.29 per diluted share.

•Non-GAAP net income of $12.0 million (representing 20.8% of revenue), or $0.16 per diluted share (non-GAAP EPS).

•Company repurchased 168,000 shares at an average price of $14.52 for a total of $2.4 million. The Board has also authorized a new repurchase plan for up to $50 million.

•The Board of Directors approved a quarterly cash dividend of $0.06 per share, payable on December 1, 2023 to stockholders of record at the close of business on November 17, 2023.

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

“Our intentional revenue diversification and proven business model is enabling A10 to navigate a challenging period while maintaining profitability, cash generation and the continued return of capital to shareholders,” said Dhrupad Trivedi, President and Chief Executive Officer of A10 Networks. “Growth in enterprise revenue partially offset delays in service provider spending that resulted in a decline in short-term service provider revenue. We continue to believe opportunities have been delayed, not lost, and that the long-term demand for security and network expansion solutions remains robust, supporting our intermediate-term outlook.”

“A10 remains solidly and systemically profitable, and we adjusted our business priorities to maintain solid profitability as we navigate these macro headwinds,” continued Trivedi. “Our year-to-date Adjusted EBITDA margin was 26.1%, in-line with our stated business goals. Our expense management initiatives are focused on preserving our long-term growth investments, enabling us to maintain strong cash generation and advancing security-focused solutions as our customers navigate economic uncertainty and a higher cost of capital.”

Conference Call

Management will host a call at 1:30 p.m. Pacific time (4:30 p.m. Eastern time) today, November 7, 2023, to discuss these results. Interested parties may access the conference call by dialing (833) 470-1428 (toll-free) or (646) 904-5544 and referencing access code: 743487.

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 days and may be accessed by dialing (866) 813-9403 (toll-free) or (929) 458-6194 and entering the passcode 948753.

Forward-Looking Statements

This press release contains “forward-looking statements,” including statements regarding our quarterly dividend payments and repurchase program, strategy, including with respect to expense management, demand and order pattern challenges, positioning and growth. 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 any unforeseen need for capital which may require us to divert funds we may have otherwise used for the dividend program or stock repurchase program, which may in turn negatively impact our ability to administer the quarterly dividends or the repurchase of our common stock; a significant decline in global macroeconomic or political conditions that have an adverse impact on our business and financial results; 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 February 27, 2023. 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), we refer to certain non-GAAP financial measures, including non-GAAP net income, non-GAAP net income per basic and diluted share (or non-GAAP EPS), non-GAAP gross profit and gross margin, non-GAAP operating income and operating margin, non-GAAP operating expenses, Adjusted EBITDA and Adjusted EBITDA margin. 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 excluding: (i) stock-based compensation and related payroll tax, (ii) impairment expense, (iii) cyber incident remediation expense, (iv) workforce reduction expense and (v) income tax effect of excluding non-GAAP items (i) to (iv) listed above. We define non-GAAP net income per basic and diluted share as our non-GAAP net income 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, (ii) cyber incident remediation expense and (iii) workforce reduction expense. We define non-GAAP gross margin as our non-GAAP gross profit divided by our GAAP revenue. We define non-GAAP operating income as our GAAP income from operations excluding (i) stock-based compensation and related payroll tax, (ii) impairment expense, (iii) cyber incident remediation expense and (iv) workforce reduction expense. We define non-GAAP operating margin as our non-GAAP operating income 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) impairment expense, (iii) cyber incident remediation expense and (iv) workforce reduction expense. We define Adjusted EBITDA as our GAAP net income excluding (i) interest and other (income) expense, net, (ii) depreciation and amortization expense, (iii) provision for income taxes, (iv) stock-based compensation and related payroll tax, (v) impairment expense, (vi) workforce

reduction expense and (vii) cyber incident remediation expense. We define Adjusted EBITDA margin as our Adjusted EBITDA divided by our GAAP revenue.

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 / Tom Baumann

FNK IR

646.809.4048 / 646.349.6641

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 September 30, Nine Months Ended September 30,
2023 2022 2023 2022
Revenue:
Products $ 30,260 $ 45,104 $ 100,532 $ 123,624
Services 27,515 26,955 80,751 79,080
Total revenue 57,775 72,059 181,283 202,704
Cost of revenue:
Products 6,815 10,191 22,334 28,342
Services 4,194 4,574 12,354 12,747
Total cost of revenue 11,009 14,765 34,688 41,089
Gross profit 46,766 57,294 146,595 161,615
Operating expenses:
Sales and marketing 21,324 21,605 64,526 66,159
Research and development 17,620 14,360 43,250 41,483
General and administrative 5,613 5,661 18,177 17,160
Total operating expenses 44,557 41,626 125,953 124,802
Income from operations 2,209 15,668 20,642 36,813
Non-operating income (expense), net:
Interest income 1,766 432 3,401 736
Other income (expense), net 987 (871) 653 (1,204)
Non-operating income (expense), net 2,753 (439) 4,054 (468)
Income before provision for income taxes 4,962 15,229 24,696 36,345
Income tax provision (benefit) (1,507) 3,116 2,643 7,467
Net income $ 6,469 $ 12,113 $ 22,053 $ 28,878
Net income per share:
Basic $ 0.09 $ 0.16 $ 0.30 $ 0.38
Diluted $ 0.09 $ 0.16 $ 0.29 $ 0.37
Weighted-average shares used in computing net income per share:
Basic 74,526 75,881 74,184 76,191
Diluted 75,807 77,679 75,639 78,454

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO NON-GAAP NET INCOME

(unaudited, in thousands, except per share amounts)

Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
GAAP net income $ 6,469 $ 12,113 $ 22,053 $ 28,878
Non-GAAP items:
Stock-based compensation and related payroll tax 4,255 3,798 11,752 10,423
Impairment expense 2,975 2,975
Workforce reduction expense 2,437 4,298
Cyber incident remediation expense 732
Adoption of tax-effecting non-GAAP items (1) (4,140) (5,358)
Total non-GAAP items 5,527 3,798 14,399 10,423
Non-GAAP net income (1)(2) 11,996 15,911 36,452 39,301
GAAP net income per share:
Basic $ 0.09 $ 0.16 $ 0.30 $ 0.38
Diluted $ 0.09 $ 0.16 $ 0.29 $ 0.37
Non-GAAP items:
Stock-based compensation and related payroll tax 0.06 0.04 0.15 0.13
Impairment expense 0.04 0.04
Workforce reduction expense 0.03 0.06
Cyber incident remediation expense 0.01
Adoption of tax-effecting non-GAAP items (1) (0.06) (0.07)
Total non-GAAP items 0.07 0.04 0.19 0.13
Non-GAAP net income per share: (1)(2)
Basic $ 0.16 $ 0.20 $ 0.49 $ 0.51
Diluted $ 0.16 $ 0.20 $ 0.48 $ 0.50
Weighted average shares used in computing net income per share:
Basic 74,526 75,881 74,184 76,191
Diluted 75,807 77,679 75,639 78,454

(1)For 2023, we adopted presenting non-GAAP net income impacted for the income tax effect of excluding non-GAAP items. In the three and nine months ended September 30, 2023, the income tax effect represents a non-GAAP profit before tax rate of 18.0%. For the three months ended September 30, 2022, the income tax effect of excluding non-GAAP items would be $2,831 thousand and non-GAAP net income adjusted for the income tax effect of excluding non-GAAP items would be $13,080 thousand, representing a $0.03 decrease in reported non-GAAP net income per share in the table above. The tax effect of $2,831 thousand represents a non-GAAP profit before tax rate of 14.9%. For the nine months ended September 30, 2022, the income tax effect of excluding non-GAAP items would be $5,876 thousand and non-GAAP net income adjusted for the income tax effect of excluding non-GAAP items would be $33,425 thousand, representing a $0.07 decrease in reported non-GAAP net income per share in the table above. The tax effect of $5,876 thousand represents a non-GAAP profit before tax rate of 12.6%.

(2)Net income and earnings per share excluding adjustments are non-GAAP financial measures presented as supplemental financial measures to enable a user of the financial information to understand the impact of these adjustments on reported results. These financial measures should not be considered an alternative to net income,

operating income, cash flows provided by operating activities, or any other measure of financial performance or liquidity presented in accordance with U.S. GAAP. Our adjusted net income and earnings per share may not be comparable to similarly titled measures of another company because companies may not all calculate adjusted net income and earnings per share in the same manner.

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

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

September 30,<br>2023 December 31,<br>2022
ASSETS
Current assets:
Cash and cash equivalents $ 104,152 $ 67,971
Marketable securities 64,889 83,018
Accounts receivable, net of allowances of $197 and $32, respectively 59,070 72,928
Inventory 23,561 19,693
Prepaid expenses and other current assets 12,959 13,381
Total current assets 264,631 256,991
Property and equipment, net 26,054 19,743
Goodwill 1,307 1,307
Deferred tax assets, net 61,088 63,183
Other non-current assets 24,762 27,881
Total assets $ 377,842 $ 369,105
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable $ 8,214 $ 6,725
Accrued liabilities 23,577 37,183
Deferred revenue 79,540 74,340
Total current liabilities 111,331 118,248
Deferred revenue, non-current 56,174 52,652
Other non-current liabilities 13,415 17,193
Total liabilities 180,920 188,093
Stockholders' equity:
Common stock, $0.00001 par value: 500,000 shares authorized; 88,739 and 87,123 shares issued and 74,750 and 73,738 shares outstanding, respectively 1 1
Treasury stock, at cost: 13,989 and 13,384 shares, respectively (143,606) (134,934)
Additional paid-in-capital 481,765 466,927
Dividends paid (33,171) (19,802)
Accumulated other comprehensive income (loss) 334 (726)
Accumulated deficit (108,401) (130,454)
Total stockholders' equity 196,922 181,012
Total liabilities and stockholders' equity $ 377,842 $ 369,105

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands, on a GAAP Basis)

Nine Months Ended September 30,
2023 2022
Cash flows from operating activities:
Net income $ 22,053 $ 28,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization 6,845 5,539
Stock-based compensation 11,180 9,818
Other non-cash items 774 49
Changes in operating assets and liabilities:
Accounts receivable 14,056 (11,090)
Inventory (5,313) 530
Prepaid expenses and other assets 2,033 (2,574)
Accounts payable (1,183) (914)
Accrued liabilities (17,384) 4,001
Deferred revenue 8,722 4,536
Net cash provided by operating activities 41,783 38,773
Cash flows from investing activities:
Proceeds from sales of marketable securities 42,252 6,252
Proceeds from maturities of marketable securities 54,007 48,248
Purchases of marketable securities (75,064) (45,699)
Purchases of property and equipment (7,752) (8,261)
Net cash provided by investing activities 13,443 540
Cash flows from financing activities:
Proceeds from issuance of common stock under employee equity incentive plans 2,996 4,662
Repurchase of common stock (8,672) (79,257)
Payments for dividends (13,369) (11,512)
Net cash used in financing activities (19,045) (86,107)
Net increase (decrease) in cash and cash equivalents 36,181 (46,794)
Cash and cash equivalents—beginning of period 67,971 78,925
Cash and cash equivalents—end of period $ 104,152 $ 32,131
Non-cash investing and financing activities:
Transfers between inventory and property and equipment $ 1,445 $ 642
Purchases of property and equipment included in accounts payable $ 2,672 $ 108

A10 NETWORKS, INC.

RECONCILIATION OF GAAP GROSS PROFIT TO NON-GAAP GROSS PROFIT

(unaudited, in thousands, except percentages)

Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
GAAP gross profit $ 46,766 $ 57,294 $ 146,595 $ 161,615
GAAP gross margin 80.9 % 79.5 % 80.9 % 79.7 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 512 489 1,373 1,248
Workforce reduction expense 42
Cyber incident remediation expense 3
Non-GAAP gross profit $ 47,278 $ 57,783 $ 148,013 $ 162,863
Non-GAAP gross margin 81.8 % 80.2 % 81.6 % 80.3 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP TOTAL OPERATING EXPENSES

TO NON-GAAP TOTAL OPERATING EXPENSES

(unaudited, in thousands)

Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
GAAP total operating expenses $ 44,557 $ 41,626 $ 125,953 $ 124,802
Non-GAAP adjustments:
Stock-based compensation and related payroll tax (3,743) (3,309) (10,379) (9,175)
Impairment expense (2,975) (2,975)
Workforce reduction expense (2,437) (4,256)
Cyber incident remediation expense (729)
Non-GAAP total operating expenses $ 35,402 $ 38,317 $ 107,614 $ 115,627

A10 NETWORKS, INC.

RECONCILIATION OF GAAP INCOME FROM OPERATIONS

TO NON-GAAP OPERATING INCOME

(unaudited, in thousands, except percentages)

Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
GAAP income from operations $ 2,209 $ 15,668 $ 20,642 $ 36,813
GAAP operating margin 3.8 % 21.7 % 11.4 % 18.2 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 4,255 3,798 11,752 10,423
Impairment expense 2,975 2,975
Workforce reduction expense 2,437 4,298
Cyber incident remediation expense 732
Non-GAAP operating income $ 11,876 $ 19,466 $ 40,399 $ 47,236
Non-GAAP operating margin 20.6 % 27.0 % 22.3 % 23.3 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO

EBITDA AND ADJUSTED EBITDA (NON-GAAP)

(unaudited, in thousands)

Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
GAAP net income $ 6,469 $ 12,113 $ 22,053 $ 28,878
GAAP net income margin 11.2 % 16.8 % 12.2 % 14.2 %
Exclude: Interest and other (income) expense, net (2,753) 439 (4,054) 468
Exclude: Depreciation and amortization 2,537 1,827 6,845 5,539
Exclude: Income tax provision (benefit) (1,507) 3,116 2,643 7,467
EBITDA 4,746 17,495 27,487 42,352
Exclude: Stock-based compensation and related payroll tax 4,255 3,798 11,752 10,423
Exclude: Impairment expense 2,975 2,975
Exclude: Workforce reduction expense 2,437 4,298
Exclude: Cyber incident remediation expense 732
Adjusted EBITDA $ 14,413 $ 21,293 $ 47,244 $ 52,775
Adjusted EBITDA margin 24.9 % 29.5 % 26.1 % 26.0 %

atenq32023earningscallsl

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. 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 any unforeseen need for capital which may require us to divert funds we may have otherwise used for the dividend program or stock repurchase program, which may in turn negatively impact our ability to administer the quarterly dividends or the repurchase of our common stock; a significant decline in global macroeconomic or political conditions that have an adverse impact on our business and financial results; 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 February 27, 2023. 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. 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 excluding: (i) stock-based compensation and related payroll tax, (ii) impairment expense, (iii) cyber incident remediation expense, (iv) workforce reduction expense and (v) income tax effect of excluding non-GAAP items (i) to (iv) listed above. We define non-GAAP net income per basic and diluted share as our non-GAAP net income 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, (ii) cyber incident remediation expense and (iii) workforce reduction expense. We define non-GAAP gross margin as our non-GAAP gross profit divided by our GAAP revenue. We define non-GAAP operating income as our GAAP income from operations excluding (i) stock-based compensation and related payroll tax, (ii) impairment expense, (iii) cyber incident remediation expense and (iv) workforce reduction expense. We define non-GAAP operating margin as our non-GAAP operating income 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) impairment expense, (iii) cyber incident remediation expense and (iv) workforce reduction expense. We define Adjusted EBITDA as our GAAP net income excluding (i) interest and other (income) expense, net, (ii) depreciation and amortization expense, (iii) provision for income taxes, (iv) stock-based compensation and related payroll tax, (v) impairment expense, (vi) workforce reduction expense and (vii) cyber incident remediation expense. We define Adjusted EBITDA margin as our Adjusted EBITDA divided by our GAAP revenue. 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.


Agenda ▪ Q3 and YTD Overview ▪ Q3 Financial Performance ▪ FY 2023 Outlook


Q3’23: Continued Profitability, Revenue Headwinds Revenue Overview • Q3 revenue decreased 20% year-over-year • Continued challenges from tier-one Service Providers in North America partially offset by strength with Enterprise customers Consistent Profitability • Adjusted EBITDA was $14.4 million, or 24.9% of revenue • GAAP EPS of $0.09 • Non-GAAP EPS of $0.16 Key Takeaways • Diversification in revenues and customers mitigates impact of macroeconomic headwinds • Demonstrated earnings power even amidst revenue challenges • Security solutions remain in high demand • Positioned to achieve full-year profitability targets See Appendix for reconciliation to most comparable GAAP financial measures.


Quarterly Revenue & Adjusted EBITDA Operating Income is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. $72.1 $77.6 $57.7 $65.8 $57.8 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Revenue, $ Millions $21.3 $22.9 $15.5 $17.4 $14.4 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Adjusted EBITDA, $ Millions $72.1 $57.8 Q3'22 Q3'23 Revenue, $ Millions $21.3 $14.4 Q3'22 Q3'23 Adjusted EBITDA, $ Millions


50.0%50.0% Q3’23 $57.7 million Quarterly Revenue by Customer Vertical 62.4% 69.2% 56.4% 67.4% 50.0% 37.6% 30.8% 43.6% 32.6% 50.0% Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Enterprise Service Provider


Quarterly Revenue by Geography 49% 49% 48% 53% 57% 50% 53% 52% 56% 45% 39% 34% 35% 28% 32% 34% 33% 27% 33% 37% 12% 17% 17% 19% 11% 16% 14% 21% 11% 19% Q2'21 Q3'21 Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 $ Millions Americas APJ EMEA 45% 37% 19% Q3’23 $57.7 million


Consistent Value Creation Business Model Revenue Growth Capital Allocation


Appendix


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) Q1’20 Q2’20 Q3’20 Q4’20 FY 2020 Q1’21 Q2’21 Q3’21 Q4’21 FY 2021 Q1’22 Q2’22 Q3’22 Q4’22 FY 2022 Q1’23 Q2’23 Q3’23 Revenue $53.8 $52.5 $56.6 $62.7 $225.5 $54.8 $59.2 $65.4 $70.7 $250.0 $62.7 $68.0 $72.1 $77.6 $280.3 $57.7 $65.8 $57.8 Non-GAAP Gross Margin % 78.3% 78.8% 77.6% 79.6% 78.6% 78.9% 77.9% 80.4% 80.7% 79.6% 80.2% 80.6% 80.2% 80.3% 80.3% 83.1% 80.2% 81.8% Non-GAAP Operating Margin % 7.6% 13.8% 17.8% 22.1% 15.6% 19.7% 18.8% 22.2% 24.8% 21.6% 18.6% 23.7% 27.0% 25.5% 23.9% 23.1% 23.1% 20.6% Adjusted EBITDA (non- GAAP) $7.2 $9.8 $12.5 $16.1 $45.6 $13.0 $13.2 $16.8 $19.4 $62.4 $13.5 $18.0 $21.3 $22.3 $75.1 $15.5 $17.4 $14.4 Non-GAAP EPS $0.05 $0.09 $0.13 $0.18 $0.44 $0.12 $0.13 $0.17 $0.20 $0.63 $0.13 $0.17 $0.20 $0.24 $0.74 $0.13 $0.19 $0.16 Ending Cash & Marketable Securities $142.9 $143.4 $159.1 $158.1 $158.1 $161.0 $166.8 $187.5 $185.0 $185.0 $164.7 $166.8 $127.8 $151.0 $151.0 $144.5 $153.9 $169.0


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 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Gross Margin % - GAAP 79.5% 80.2% 79.5% 79.7% 82.3% 79.5% 80.9% Stock-based compensation 0.7% 0.5% 0.7% 0.5% 0.8% 0.6% 0.9% Gross Margin % - Non-GAAP 80.2% 80.6% 80.2% 80.3% 83.1% 80.2% 81.8% EPS $ - GAAP 0.08$ 0.13$ 0.16$ 0.24$ 0.05$ 0.15$ 0.09$ Stock-based compensation 0.05 0.04 0.05 0.05 0.05 0.05 0.06 Impairment of investment - - - 0.01 - - - Capitalized project impairment - - - - - - 0.04 Workforce reduction severance - - - - 0.03 - 0.03 Cyber incident remediation expense - - - - 0.02 (0.01) - Tax benefit from amended returns - - - (0.06) - - - Income tax effect of non-GAAP items (starting Mar-23) - - - - (0.02) (0.00) (0.06) EPS $ - Non-GAAP 0.13$ 0.17$ 0.20$ 0.24$ 0.13$ 0.19$ 0.16$


GAAP to Non-GAAP – Operating Income 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 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Income from operations $ - GAAP 8.0$ 13.1$ 15.7$ 16.3$ 6.2$ 12.3$ 2.2$ Stock-based compensation 3.7 2.9 3.8 3.5 4.0 3.5 4.3 Capitalized project impairment - - - - - - 3.0 Workforce reduction severance - - - - 1.9 - 2.4 Cyber incident remediation expense - - - - 1.4 (0.6) - Income from operations $ - Non-GAAP 11.7$ 16.1$ 19.5$ 19.8$ 13.4$ 15.2$ 11.9$ % of Revenue Income from operations % - GAAP 12.8 % 19.3 % 21.7 % 21.0 % 10.7 % 18.6 % 3.8 % Stock-based compensation 5.9 % 4.3 % 5.3 % 4.6 % 6.9 % 5.4 % 7.5 % Capitalized project impairment —% —% —% —% —% —% 5.1 % Workforce reduction severance —% —% —% —% 3.2 % —% 4.2 % Cyber incident remediation expense —% —% —% —% 2.3 % (0.9)% —% Income from operations % - Non-GAAP 18.6 % 23.7 % 27.0 % 25.5 % 23.1 % 23.1 % 20.6 %


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 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 GAAP net income 6.3$ 10.4$ 12.1$ 18.0$ 4.0$ 11.6$ 6.5$ Exclude: Interest income and other (income) expense, net 0.5 (0.5) 0.4 (0.1) 1.2 (2.5) (2.8) Exclude: Depreciation & amortization expense 1.8 1.9 1.8 2.5 2.1 2.2 2.5 Exclude: Provision (benefit) for income taxes 1.1 3.2 3.1 (1.7) 1.0 3.2 (1.5) EBITDA 9.8 15.0 17.5 18.7 8.3 14.5 4.7 Exclude: Stock-based compensation 3.7 2.9 3.8 3.5 4.0 3.5 4.3 Exclude: Capitalized project impairment - - - - - - 3.0 Exclude: Workforce reduction severance - - - - 1.9 - 2.4 Exclude: Cyber incident remediation expense - - - - 1.4 (0.6) - Adjusted EBITDA - Non-GAAP 13.5$ 18.0$ 21.3$ 22.3$ 15.5$ 17.4$ 14.4$