8-K

A10 Networks, Inc. (ATEN)

8-K 2025-11-04 For: 2025-11-04
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 4, 2025

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 4, 2025, A10 Networks, Inc. (the “Company”) issued a press release regarding financial results for the quarter ended September 30, 2025. A copy of the press release is furnished herewith as Exhibit 99.1.

Item 7.01    Regulation FD Disclosure

On November 4, 2025, the Company posted on its website (www.a10networks.com) slides regarding the financial results for the quarter ended September 30, 2025. 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 4, 2025, the Company announced that its Board of Directors (the “Board”) approved 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, 2025 to stockholders of record on November 17, 2025. 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 the Company’s capital allocation strategy from time-to-time.

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, term and other aspects of our dividend program and any anticipated benefits or value resulting from such program. 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, 2024, 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 datedNovemberq3-25exx99111042025earning.htm4, 2025.
99.2 Slides of A10 Networks, Inc. datedNovemberatenq32025earningscallsl.htm4, 2025, regarding financial results of the second quarter endedSeptember30, 2025.

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 4, 2025

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

Document

EXHIBIT 99.1

a10logoa.jpg

A10 Networks Reports Financial Results for the Third Quarter of 2025

Company Grows Revenue 11.9% as AI Infrastructure Buildouts Serve as Key Catalysts

SAN JOSE, Calif., November 4, 2025 -- A10 Networks, Inc. (NYSE: ATEN), a leading provider of secure application services and solutions, today announced financial results for its third quarter ended September 30, 2025.

Third Quarter 2025 Financial Summary

•Revenue of $74.7 million, up 11.9% year-over-year compared to $66.7 million in the third quarter of 2024.

•GAAP gross margin of 80.1%; non-GAAP gross margin of 80.7%.

•GAAP Operating Margin was 17.4% compared to 15.7% in the third quarter of 2024. Non-GAAP Operating Margin was 24.7% compared to 22.6% in the third quarter of 2024.

•GAAP net income of $12.2 million, or $0.17 per diluted share, compared to net income of $12.6 million, or $0.17 per diluted share, in the third quarter of 2024.

•Non-GAAP net income of $16.7 million, or $0.23 per diluted share, compared to non-GAAP net income of $15.9 million, or $0.21 per diluted share in the third quarter of 2024.

•The Company returned $15.3 million to investors, having repurchased 634,000 shares at an average price of $17.41 per share for a total of $11.0 million and having paid $4.3 million in cash dividends in the quarter. The Company has $60.1 million remaining on its $75.0 million share repurchase authorization.

•The Board of Directors approved a quarterly cash dividend of $0.06 per share, payable December 1, 2025 to stockholders of record at the close of business on November 17, 2025.

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

“The scale and sophistication of cyber threats continue to accelerate, prompting global carriers, enterprises, and government agencies to make security and performance integral to their infrastructure roadmaps,” said Dhrupad Trivedi, President and Chief Executive Officer of A10 Networks. “This dynamic is gaining urgency as AI-driven workloads scale in both utilization and deployment footprints. A10 is well-aligned with this trend, and our offerings are seen as increasingly relevant to address these concerns. We are well-aligned with our customers near-term roadmaps, and long-term financial objectives tied to AI infrastructure and cybersecurity.”

“Operational discipline remains a core aspect of our business model as we allocate resources to the best opportunities, efficiently converting revenue growth into solid profitability and robust cash flow,” continued Trivedi. “A10 continues to deliver long-term value as we navigate market priorities. We remain focused on disciplined execution to drive sustained top- and bottom-line growth.”

Conference Call

Management will host a call at 1:30 p.m. Pacific time (4:30 p.m. Eastern time) today, November 4, 2025, to discuss these results. Interested parties may access the conference call by dialing (888) 506-0062 (toll-free) or (973) 528-0011 (international) and referencing access code: 608502.

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 one year. A telephonic replay of the conference call will be available until November 18, 2025 and may be accessed by dialing (877) 481-4010 (toll-free) or (919) 882-2331 (international) and entering the passcode: 53066.

Forward-Looking Statements

This press release contains “forward-looking statements,” including statements regarding our quarterly dividend payments, strategy, positioning, demand, growth rate, margin profile, operating leverage, profitability and investor returns. 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; an expansion of adversarial global trade dynamics or other changes to international trade regulations; 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 rates 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 25, 2025. 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 expenses, non-GAAP operating income and operating margin, 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) acquisition-related expense, (iii) amortization of purchased intangible assets, (iv) one-time legal expense, (v) tax planning expense and (vi) income tax effect of non-GAAP items (i) to (v) 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 and (ii) amortization of purchased intangible assets. We define non-GAAP gross margin as our non-GAAP gross profit 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) acquisition-related expense, (iii) amortization of purchased intangible assets, (iv) one-time legal expense and (v) tax planning expense. We define non-GAAP operating income as our GAAP income from operations excluding (i) stock-based compensation and related payroll tax, (ii) acquisition-related expense, (iii) amortization of purchased intangible assets, (iv) one-time legal expense and (v) tax planning expense. We define non-GAAP operating margin as our non-GAAP operating income divided by our GAAP revenue. 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) acquisition-related expense, (vi) one-time legal expense and (vii) tax planning 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) delivers secure application and network solutions that protect, optimize, and scale business-critical systems across on-premises, hybrid cloud, and edge environments. Our portfolio enables large enterprises, service providers, and cloud platforms worldwide to deliver performance, reliability, and protection against cyber threats, while preparing their networks for the demands of AI and next-generation applications. Founded in 2004 and headquartered in San Jose, California, A10 Networks serves over 7,000 global customers. For more information, visit A10networks.com and follow us at 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

David Schroeder

VP, Corporate Development

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,
2025 2024 2025 2024
Net revenue:
Products $ 43,109 $ 36,862 $ 118,261 $ 96,464
Services 31,573 29,859 91,941 91,028
Total net revenue 74,682 66,721 210,202 187,492
Cost of net revenue:
Products 8,101 7,531 23,561 21,143
Services 6,729 5,508 19,383 15,378
Total cost of net revenue 14,830 13,039 42,944 36,521
Gross profit 59,852 53,682 167,258 150,971
Operating expenses:
Sales and marketing 21,531 21,011 62,040 61,678
Research and development 18,377 15,734 50,533 44,533
General and administrative 6,950 6,494 22,602 19,188
Total operating expenses 46,858 43,239 135,175 125,399
Income from operations 12,994 10,443 32,083 25,572
Non-operating income (expense):
Interest income 3,386 1,634 8,170 5,077
Interest and other income (expense), net (2,387) 2,312 (3,853) 5,943
Total non-operating income, net 999 3,946 4,317 11,020
Income before income taxes 13,993 14,389 36,400 36,592
Provision for income taxes 1,802 1,752 4,128 4,753
Net income $ 12,191 $ 12,637 $ 32,272 $ 31,839
Net income per share:
Basic $ 0.17 $ 0.17 $ 0.45 $ 0.43
Diluted $ 0.17 $ 0.17 $ 0.44 $ 0.42
Weighted-average shares used in computing net income per share:
Basic 71,891 73,823 72,478 74,200
Diluted 73,046 74,780 73,805 75,236

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,
2025 2024 2025 2024
GAAP net income $ 12,191 $ 12,637 $ 32,272 $ 31,839
Non-GAAP items:
Stock-based compensation and related payroll tax 4,961 4,516 15,839 12,814
Acquisition-related expense 465 1,383
Amortization of purchased intangible assets 380 963
One-time legal expense 22 1,269 71
Tax planning expense 100 150 500
Income tax-effect of non-GAAP items (1,318) (1,327) (4,687) (3,343)
Total non-GAAP items 4,510 3,289 14,917 10,042
Non-GAAP net income $ 16,701 $ 15,926 $ 47,189 $ 41,881
GAAP net income per share:
Basic $ 0.17 $ 0.17 $ 0.45 $ 0.43
Diluted $ 0.17 $ 0.17 $ 0.44 $ 0.42
Non-GAAP items:
Stock-based compensation and related payroll tax 0.07 0.06 0.21 0.17
Acquisition-related expense 0.01 0.02
Amortization of purchased intangible assets 0.01 0.01
One-time legal expense 0.02
Tax planning expense 0.01
Income tax-effect of non-GAAP items (0.02) (0.02) (0.06) (0.04)
Total non-GAAP items 0.06 0.04 0.20 0.14
Non-GAAP net income per share:
Basic $ 0.23 $ 0.22 $ 0.65 $ 0.56
Diluted $ 0.23 $ 0.21 $ 0.64 $ 0.56
Weighted average shares used in computing net income per share:
Basic 71,891 73,823 72,478 74,200
Diluted 73,046 74,780 73,805 75,236

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)

As of September 30, 2025 As of December 31, 2024
ASSETS
Current assets:
Cash and cash equivalents $ 86,555 $ 95,129
Marketable securities 284,304 100,429
Accounts receivable, net of allowances of $323 and $465, respectively 61,578 76,687
Inventory 18,963 22,005
Prepaid expenses and other current assets 17,279 13,038
Total current assets 468,679 307,288
Property and equipment, net 47,029 39,142
Goodwill 15,134 1,307
Intangible assets, net 6,638
Deferred tax assets, net 62,535 62,364
Other non-current assets 20,118 22,714
Total assets $ 620,133 $ 432,815
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable $ 11,219 $ 12,542
Accrued and other liabilities 35,493 32,696
Deferred revenue, current 82,017 78,335
Total current liabilities 128,729 123,573
Deferred revenue, non-current 61,470 69,924
Long-term debt 218,450
Other non-current liabilities 5,271 7,489
Total liabilities 413,920 200,986
Stockholders' equity:
Common stock, $0.00001 par value: 500,000 shares authorized; 91,776 and 90,520 shares issued and 71,684 and 73,693 shares outstanding, respectively 1 1
Treasury stock, at cost: 20,092 and 16,827 shares, respectively (243,000) (180,992)
Additional paid-in-capital 525,303 508,387
Dividends paid (68,492) (55,417)
Accumulated other comprehensive income 473 194
Accumulated deficit (8,072) (40,344)
Total stockholders' equity 206,213 231,829
Total liabilities and stockholders' equity $ 620,133 $ 432,815

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands, on a GAAP Basis)

Nine Months Ended September 30,
2025 2024
Cash flows from operating activities:
Net income $ 32,272 $ 31,839
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization 10,876 8,248
Stock-based compensation 15,206 12,284
Other non-cash items 2,251 (1,013)
Changes in operating assets and liabilities:
Accounts receivable 14,803 8,378
Inventory 2,728 (1,911)
Prepaid expenses and other assets (6,912) 753
Accounts payable (2,100) (1,820)
Accrued liabilities 351 5,139
Deferred revenue (7,288) 2,885
Net cash provided by operating activities 62,187 64,782
Cash flows from investing activities:
Proceeds from sales of marketable securities 22,536
Proceeds from maturities of marketable securities 96,426 66,446
Purchases of marketable securities (278,920) (127,288)
Acquisition (19,100)
Capital expenditures (13,464) (9,886)
Net cash used in investing activities (215,058) (48,192)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee equity incentive plans 1,710 1,919
Proceeds from the issuance of convertible notes 225,000
Payment of debt issuance costs (7,330)
Repurchase of common stock (62,008) (24,321)
Payments for dividends (13,075) (13,369)
Net cash provided by (used in) financing activities 144,297 (35,771)
Net decrease in cash and cash equivalents (8,574) (19,181)
Cash and cash equivalents—beginning of period 95,129 97,244
Cash and cash equivalents—end of period $ 86,555 $ 78,063
Non-cash investing and financing activities:
Transfers between inventory and property and equipment $ 314 $ 2,015
Capital expenditures included in accounts payable $ 229 $ 2,340
Supplemental cash flow disclosure:
Cash paid for income taxes, net $ 3,694 $ 4,582

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,
2025 2024 2025 2024
GAAP gross profit $ 59,852 $ 53,682 $ 167,258 $ 150,971
GAAP gross margin 80.1 % 80.5 % 79.6 % 80.5 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 136 534 1,284 1,568
Amortization of purchased intangible assets 281 712
Non-GAAP gross profit $ 60,269 $ 54,216 $ 169,254 $ 152,539
Non-GAAP gross margin 80.7 % 81.3 % 80.5 % 81.4 %

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,
2025 2024 2025 2024
GAAP total operating expenses $ 46,858 $ 43,239 $ 135,175 $ 125,399
Non-GAAP adjustments:
Stock-based compensation and related payroll tax (4,825) (3,982) (14,555) (11,246)
Acquisition-related expense (101) (655)
Amortization of purchased intangible assets (99) (251)
One-time legal expense (22) (1,269) (71)
Tax planning expense (100) (150) (500)
Non-GAAP total operating expenses $ 41,811 $ 39,157 $ 118,295 $ 113,582

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,
2025 2024 2025 2024
GAAP income from operations $ 12,994 $ 10,443 $ 32,083 $ 25,572
GAAP operating margin 17.4 % 15.7 % 15.3 % 13.6 %
Non-GAAP adjustments:
Stock-based compensation and related payroll tax 4,961 4,516 15,839 12,814
Acquisition-related expense 101 655
Amortization of purchased intangible assets 380 963
One-time legal expense 22 1,269 71
Tax planning expense 100 150 500
Non-GAAP operating income $ 18,458 $ 15,059 $ 50,959 $ 38,957
Non-GAAP operating margin 24.7 % 22.6 % 24.2 % 20.8 %

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO

EBITDA AND ADJUSTED EBITDA (NON-GAAP)

(unaudited, in thousands, except percentages)

Three Months Ended September 30, Nine Months Ended September 30,
2025 2024 2025 2024
GAAP net income $ 12,191 $ 12,637 $ 32,272 $ 31,839
GAAP net income margin 16.3 % 18.9 % 15.4 % 17.0 %
Exclude: Interest and other income, net (999) (3,946) (4,317) (11,020)
Exclude: Depreciation and amortization 3,799 2,741 11,079 8,248
Exclude: Provision for income taxes 1,802 1,752 4,128 4,753
EBITDA 16,793 13,184 43,162 33,820
Exclude: Stock-based compensation and related payroll tax 4,961 4,516 15,839 12,814
Exclude: Acquisition-related expense 101 655
Exclude: One-time legal expense 22 1,269 71
Exclude: Tax planning expense 100 150 500
Adjusted EBITDA $ 21,877 $ 17,800 $ 61,075 $ 47,205
Adjusted EBITDA margin 29.3 % 26.7 % 29.1 % 25.2 %

atenq32025earningscallsl

Q3 2025 Financial Results & Commentary November 4, 2025


Cautionary Statements & Disclosures This presentation and the accompanying oral presentation contain “forward-looking” statements that are based on our management’s beliefs and assumptions, including statements regarding our strategy, market, operations, profitability and 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 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; an expansion of adversarial global trade dynamics or other changes to international trade regulations; 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 25, 2025. 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 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 expenses, non-GAAP operating income and operating margin, 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 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) acquisition-related expense, (iii) amortization of purchased intangible assets, (iv) one-time legal expense, (v) tax planning expense and (vi) income tax effect of non-GAAP items (i) to (v) 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 and (ii) amortization of purchased intangible assets. We define non- GAAP gross margin as our non-GAAP gross profit 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) acquisition-related expense, (iii) amortization of purchased intangible assets, (iv) one-time legal expense and (v) tax planning expense. We define non-GAAP operating income as our GAAP income from operations excluding (i) stock-based compensation and related payroll tax, (ii) acquisition-related expense, (iii) amortization of purchased intangible assets, (iv) one-time legal expense and (v) tax planning expense. We define non- GAAP operating margin as our non-GAAP operating income divided by our GAAP revenue. 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) acquisition-related expense, (vi) one-time legal expense and (vii) tax planning 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.


Agenda ▪ Q3 2025 Overview ▪ YTD 2025 Overview ▪ New CFO


Q3’25: Broad-Based Improvements Revenue Overview • Q3 Revenue increased 11.9% year-over-year; YTD Revenue up 12.1% • Security-led revenue exceeded 65% long-term target Consistent Profitability • Non-GAAP gross margins of 80.7% in Q3’25 • GAAP EPS of $0.17 • Non-GAAP EPS of $0.23 Key Takeaways • Increasingly strong alignment with AI security and infrastructure buildout and adoption • Enterprise segment pipeline expanding • Profitability in line with expectations See Appendix for reconciliation to most comparable GAAP financial measures.


Quarterly Revenue & Adjusted EBITDA Adjusted EBITDA is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. $66.7 $74.2 $66.1 $69.4 $74.7 Q3'24 Q4'24 Q1'25 Q2'25 Q3'25 Revenue, $ Millions $17.8 $27.3 $19.5 $19.7 $21.9 Q3'24 Q4'24 Q1'25 Q2'25 Q3'25 Adjusted EBITDA, $ Millions $66.7 $74.7 Q3'24 Q3'25 Revenue, $ Millions $17.8 $21.9 Q3'24 Q3'25 Adjusted EBITDA, $ Millions


Revenue by Customer Vertical $107.7 $128.4 Q3'24 YTD Q3'25 YTD Service Provider YTD Revenue, $ Millions $30.0 $31.5 $27.1 $27.8 $26.9 $36.7 $42.7 $39.0 $41.6 $47.8 Q3'24 Q4'24 Q1'25 Q2'25 Q3'25 Revenue, $ Millions Service Provider Enterprise $79.6 $81.8 Q3'24 YTD Q3'25 YTD Enterprise YTD Revenue, $ Millions


Quarterly Revenue by Geography 51% 56% 51% 59% 65% 35% 27% 28% 26% 22% 14% 17% 21% 15% 12% Q3'24 Q4'24 Q1'25 Q2'25 Q3'25 $ Millions Americas APJ EMEA 65% 22% 12% Q3’25 $74.7 million


A10 Platform A10 Control: Analytics, Insights and Automation A10 Infrastructure A10 Defend Long term Management Layer that support third party solutions A Unified software platform to deliver best in class technical performance Provide a common way to manage multiple categories including third party products Hybrid Infrastructure and AI buildout What We Do 1 2 3 4


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 Margins and EPS) Q1’22 Q2’22 Q3’22 Q4’22 FY 2022 Q1’23 Q2’23 Q3’23 Q4’23 FY 2023 Q1’24 Q2’24 Q3’24 Q4’24 FY 2024 Q1’25 Q2’25 Q3'25 Revenue $62.7 $68.0 $72.1 $77.6 $280.3 $57.7 $65.8 $57.8 $70.4 $251.7 $60.7 $60.1 $66.7 $74.2 $261.7 $66.1 $69.4 $74.7 Non-GAAP Gross Margin % 80.2% 80.6% 80.2% 80.3% 80.3% 83.1% 80.2% 81.8% 81.8% 81.7% 81.9% 80.9% 81.3% 80.7% 81.2% 80.9% 80.0% 80.7% Non-GAAP Operating Margin % 18.6% 23.7% 27.0% 25.5% 23.9% 23.1% 23.1% 20.6% 30.4% 24.6% 18.5% 21.1% 22.6% 32.7% 24.2% 24.4% 23.6% 24.7% Adjusted EBITDA (non-GAAP) $13.5 $18.0 $21.3 $22.3 $75.1 $15.5 $17.4 $14.4 $23.9 $71.2 $13.9 $15.5 $17.8 $27.3 $74.5 $19.5 $19.7 $21.9 Non-GAAP EPS $0.13 $0.17 $0.20 $0.24 $0.74 $0.13 $0.19 $0.16 $0.25 $0.73 $0.17 $0.18 $0.21 $0.31 $0.86 $0.20 $0.21 $0.23 Ending Cash & Marketable Securities $164.7 $166.8 $127.8 $151.0 $151.0 $144.5 $153.9 $169.0 $159.3 $159.3 $182.1 $177.1 $182.1 $195.6 $195.6 $355.8 $367.4 $370.9


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.


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. Q3’23


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.


Strong Balance Sheet Long-Term Debt • $225 million Convertible Senior Notes • Issued March 2025 maturing April 2030 • Coupon rate of 2.75% per annum, payable semi-annually on April 1 and October 1 • Balance September 30, 2025 $218.5 million • Potential Use of Proceeds: • General corporate purposes • Invest in organic growth • Potential M&A (In $ millions) September 30, 2025 December 31, 2024 Cash and Cash Equivalents $86.6 $95.1 Marketable Securities $284.3 $100.4 Total Assets $620.1 $432.8 Long-Term Debt $218.5 - Total Liabilities $413.9 $200.9