A10 Networks, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

For the quarterly period ended June 30, 2026

OR

For the transition period from to

Commission file number:001-36343

(Exact Name of Registrant as Specified in its Charter)

(408)325-8668

(Registrant’s Telephone Number, Including Area Code)

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

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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.¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐ Nox

As of July 31, 2026, the number of outstanding shares of the registrant’s common stock, par value $0.00001 per share, was 72,609,021.

FORM 10-Q

TABLE OF CONTENTS

NOTE REGARDING FORWARD-LOOKING STATEMENTS

The Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The words “believe,” “may,” “will,” “potentially,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “plan,” “expect,” and similar expressions that convey uncertainty of future events or outcomes are intended to identify forward-looking statements.

These forward-looking statements include, but are not limited to, statements concerning the following:

• our strategy, including as to capital allocation, revenue growth, expanding recurring revenue, and positioning for AI-driven workloads, business plan and our ability to effectively manage our growth and business operations;

• our expectations with respect to recognizing revenue related to remaining performance obligations;

• our expectations with respect to demand for our products and services;

• our plans to introduce new products and enhance our cybersecurity and AI-ready solutions;

• our investment plans, including with respect to our sales and marketing organizations, research and development (including cybersecurity technology and AI technologies), distribution channel programs and increasing awareness of our solutions on a global basis;

• loss or delay of expected purchases by our largest end-customers;

• our expectations concerning relationships with third parties, including Microsoft as it relates to the warrant;

• our expectations with respect to the realization of our tax assets and our unrecognized tax benefits;

• our plans with respect to the repatriation of our earnings from our foreign operations;

• our ability to maintain profitability while continuing to invest in our sales, marketing, product development, distribution channel programs and research and development teams;

• our expectations regarding our future costs and expenses;

• variability of our gross margin and the factors affecting it;

• our expectations with respect to liquidity position and future capital requirements;

• our stock repurchase program and our quarterly cash dividends;

• our accounting policies and estimates;

• fluctuations in currency exchange rates;

• the cost and potential outcomes of litigation;

• future acquisitions of or investments in complementary companies, products, services or technologies;

• our evaluations and expectations with respect to the potential impacts of OBBBA (as defined below);

• the impact of tariffs, import/export restrictions, and trade policies on our business, demand, and cost inputs;

• our expectations regarding demand trends across our service provider and enterprise customer verticals;

• our plans to strengthen our sales efforts in North America;

• our expectations regarding cash flows from operating activities;

• our expectations regarding any conversion of the 2030 Notes and the impact of any such settlement on our liquidity; and

• our evaluations and accounting expectations in connection with the Microsoft warrant.

These forward-looking statements are subject to a number of risks, uncertainties, and assumptions, including those described in “Risk Factors” and elsewhere in our Annual Report on Form 10-K filed with the United States Securities and Exchange Commission (the “SEC”) on February 25, 2026. Moreover, we operate in a very competitive and rapidly changing environment, and new risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. Important factors that could cause our actual results and financial condition to differ materially from those indicated in the forward-looking statements include, among others, the following: 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 maintain profitability; any loss or delay of expected purchases by our largest end-customers, or the loss of, or reduction in orders from, significant customers or distribution channels on whom we depend for a substantial portion of our revenue; our ability to maintain or improve our competitive position; competitive and execution risks related to cloud-based computing trends and our ability to compete effectively in the market for AI-driven network solutions; 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 networking and network security; the success of any future acquisitions or investments in complementary companies, products, services or technologies; the ability of our sales and other teams to execute well; our ability to shorten our close cycles; the ability of our channels to sell our products; variations in product mix or geographic locations of our sales; risks associated with our presence in international markets; including changes in tariffs, trade policies, import/export restrictions, and countermeasures that may impact our costs, supply chain, or customer demand; risks related to our convertible notes, including interest expense obligations, potential dilution upon conversion, and liquidity requirements in the event of a fundamental change; cybersecurity threats, security breaches, or other vulnerabilities affecting our own systems, products, or services; our ability to attract, retain, and motivate qualified personnel, including key technical, sales, and management employees; changes in tax laws and regulations, including ongoing assessment of the impact of OBBBA on our financial results; 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; 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, including risks associated with the geographic concentration of our manufacturing operations in Taiwan and potential geopolitical instability affecting the region; our ability to manage our business and expenses if customers cancel or delay orders; weaknesses or deficiencies in our internal control over financial reporting; and our ability to timely file periodic reports required to be filed under the Securities Exchange Act of 1934, as well as other risks identified in the “Risk Factors” section contained in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2025.

In light of these risks, uncertainties, and assumptions, the forward-looking events and circumstances discussed in this Quarterly Report on Form 10-Q may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements.

You should not rely upon forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in the forward-looking statements will be achieved or occur. Any forward-looking statements made by us in this report speak only as of the date of this report, and we do not intend to update these forward-looking statements after the filing of this report, except as required by law.

Our investor relations website is located at https://investors.A10networks.com. We use our investor relations website, our company blog (https://www.a10networks.com/blog) and our corporate X (formerly Twitter) account (https://x.com/A10Networks) to post important information for investors, including news releases, analyst presentations, and supplemental financial information, and as a means of disclosing material non-public information and for complying with our disclosure obligations under Regulation FD. Accordingly, investors should monitor our investor relations website, our company blog and our corporate X account, in addition to following press releases, SEC filings and public conference calls and webcasts. We also make available, free of charge, on our investor relations website under “SEC Filings,” our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to these reports as soon as reasonably practicable after electronically filing or furnishing those reports to the SEC.