8-K

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

August 5, 2026

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 August 5, 2026, A10 Networks, Inc. (the “Company”) issued a press release regarding financial results for the quarter ended June 30, 2026. A copy of the press release is furnished herewith as Exhibit 99.1.

Item 7.01    Regulation FD Disclosure

On August 5, 2026, the Company posted on its website (www.a10networks.com) slides regarding the financial results for the quarter ended June 30, 2026. A copy of the slides is furnished herewith as Exhibit 99.2.

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 ("Exchange Act"), 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 Exchange Act. 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 August 5, 2026, 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 September 1, 2026 to stockholders of record on August 17, 2026. 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

This Current Report on Form 8-K 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. 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, 2025, as filed with the Securities and Exchange Commission ("SEC") on February 25, 2026, 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 Current Report. All information in this Current Report and its attachments is as of the date stated and unless required by law, the Company undertakes no obligation to update or publicly revise any forward-looking statement to reflect circumstances or events after the date of this Current Report 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 dated August 5, 2026.
99.2	Slides of A10 Networks, Inc. dated August 5, 2026, regarding financial results of the second quarter ended June 30, 2026.
104.1	Cover Page Interactive Data File (embedded within the inline XBRL document).

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: August 5, 2026

A10 NETWORKS, INC.

By: /s/ Michelle Caron

Michelle Caron

Chief Financial Officer (Principal Accounting and Financial Officer)

EX-99.1

EXHIBIT 99.1

A10 Networks Reports Financial Results for the Second Quarter of 2026

Continued Execution in the Americas, Including Next-Generation Networking Demand,

Drives 14.5% Year-to-Date Revenue Growth

SAN JOSE, Calif., August 5, 2026 -- A10 Networks, Inc. (NYSE: ATEN), a leading provider of secure application services and solutions, today announced financial results for its second quarter ended June 30, 2026.  

Second Quarter 2026 Financial Summary

•Quarterly revenue of $80.1 million, a 15.5% year-over-year increase. Revenue for the first six months of 2026 was $155.1 million compared to $135.5 million for the first six months of 2025, an increase of approximately 14.5%.

•GAAP gross margin of 79.1%; non-GAAP gross margin of 80.3%.

•GAAP net income of $8.9 million, or $0.12 per diluted share, non-GAAP net income of $18.7 million, or $0.25 per diluted share.

•Non-GAAP Adjusted EBITDA of $24.4 million, representing 30.5% of revenue.

•The Company returned $6.7 million to investors, having repurchased 86,115 shares during the quarter at an average price of $27.63 per share for a total of $2.4 million and having paid $4.3 million in cash dividends in the quarter.

•The Board of Directors approved a quarterly cash dividend of $0.06 per share, payable September 1, 2026 to stockholders of record at the close of business on August 17, 2026.

•As of June 30, 2026, A10 had $357.3 million in cash, cash equivalents, and marketable securities.

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

“A10 continued to solidify its strategic position as a leader in security-focused next-generation networking solutions supporting AI-related infrastructure, driving another quarter of double-digit revenue growth and sustained cash generation,” said Dhrupad Trivedi, President and Chief Executive Officer of A10 Networks. “The growing network traffic demands, increasing complexity, and A10’s competitive position at the intersection of traffic management and security continues to resonate in the marketplace. With an expanded portfolio, including our acquisition of TrojAI in June, we believe A10 has positioned itself as a vendor of choice for next-generation networking running critical applications.”

“We are deepening our engagement with leaders defining the AI infrastructure market. Our new agreement with Microsoft reflects a successful, long-standing relationship and stands as a powerful validation of the value we jointly deliver, The agreement is structured over a multi-year period, aligning both parties’ interests as deployment continues to scale,” continued Trivedi. “We believe it pairs our opportunity with Microsoft's scaled AI deployment, further solidifying our position as a partner of choice for the world's most demanding AI workloads, while establishing a durable, forward-looking foundation for a mutually beneficial relationship in the years ahead.”

“Our model has continued to convert growth into increased profitability, cash generation, and the return of capital to shareholders,” Trivedi added. “We have increased our full-year outlook based on the performance in the first half of 2026 and our visibility into the remainder of the year.”

Outlook

Management is updating their previous guidance to the following based on first-half performance and demand outlook:

•Full-year revenue growth of 12-14% over the prior year, an increase from previous guidance of 10-12% growth.

•EPS growth of 14-16% growth year-over-year, an increase from the 12-14% growth in previous guidance.

Conference Call

Management will host a call at 1:30 p.m. Pacific time (4:30 p.m. Eastern time) today, Wednesday, August 5, 2026, 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: 338698.

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 August 19, 2026 and may be accessed by dialing (877) 481-4010 (toll-free) or (919) 882-2331 (international) and entering the passcode: 54248.

Forward-Looking Statements

This press release contains “forward-looking statements,” including statements regarding dividends and capital return, demand and market trends, strategy and competitive positioning, our commercial partnerships and agreements (including our agreement with Microsoft), financial performance and profitability, supply chain management, and 2026 financial guidance. 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, 2026. 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 by excluding certain items that, while they may recur, can vary significantly in amount and timing or are not directly indicative of ongoing operational trends, and are used by the company’s management to evaluate operating performance, prepare budgets and forecasts, and assess performance relative to peer companies.

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 acquired intangible assets, (iv) amortization of debt issuance costs, (v) certain legal expense, (vi) tax planning expense and (vii) income tax effect of non-GAAP items (i) to (vi) 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 acquired 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 acquired intangible assets, (iv) certain 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 acquired intangible assets, (iv) certain 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, net, (ii) depreciation and amortization expense, (iii) provision for income taxes, (iv) stock-based compensation and related payroll tax, (v) acquisition-related expense, (vi) certain 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 designed to protect, optimize, and scale business-critical systems across on-premises, hybrid cloud, and edge environments. Our portfolio is designed to enable large enterprises, service providers, and cloud platforms worldwide to achieve 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 June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Net revenue:
Products	$	49,024	$	39,173	$	93,010	$	75,152
Services	31,113		30,210		62,127		60,368
Total net revenue	80,137		69,383		155,137		135,520
Cost of net revenue:
Products	10,079		8,197		19,009		15,460
Services	6,677		6,475		13,023		12,654
Total cost of net revenue	16,756		14,672		32,032		28,114
Gross profit	63,381		54,711		123,105		107,406
Operating expenses:
Sales and marketing	21,905		20,964		41,919		40,509
Research and development	21,153		16,256		40,171		32,156
General and administrative	11,299		7,180		18,992		15,652
Total operating expenses	54,357		44,400		101,082		88,317
Income from operations	9,024		10,311		22,023		19,089
Non-operating income (expense):
Interest income	3,320		2,994		6,704		4,784
Interest and other income (expense), net	(2,421)		(1,376)		(4,580)		(1,466)
Total non-operating income, net	899		1,618		2,124		3,318
Income before income taxes	9,923		11,929		24,147		22,407
Provision for income taxes	1,041		1,391		3,233		2,326
Net income	$	8,882	$	10,538	$	20,914	$	20,081
Net income per share:
Basic	$	0.12	$	0.15	$	0.29	$	0.28
Diluted	$	0.12	$	0.14	$	0.28	$	0.27
Weighted-average shares used in computing net income per share:
Basic	72,161		72,009		71,916		72,777
Diluted	75,651		73,117		74,432		74,109

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO NON-GAAP NET INCOME

(unaudited, in thousands, except per share amounts)

	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
GAAP net income	$	8,882	$	10,538	$	20,914	$	20,081
Non-GAAP items:
Stock-based compensation and related payroll tax	9,292		4,586		14,342		10,878
Acquisition-related expense	1,346		574		1,346		918
Amortization of acquired intangible assets	453		380		832		583
Amortization of debt issuance costs	365		—		730		—
Certain legal expense	310		721		807		1,247
Tax planning expense	—		150		—		150
Income tax-effect of non-GAAP items	(1,902)		(1,496)		(2,494)		(3,369)
Total non-GAAP items	9,864		4,915		15,563		10,407
Non-GAAP net income	$	18,746	$	15,453	$	36,477	$	30,488
GAAP net income per share:
Basic	$	0.12	$	0.15	$	0.29	$	0.28
Diluted	$	0.12	$	0.14	$	0.28	$	0.27
Non-GAAP items:
Stock-based compensation and related payroll tax	0.12		0.06		0.19		0.15
Acquisition-related expense	0.02		0.01		0.02		0.01
Amortization of acquired intangible assets	0.01		0.01		0.01		0.01
Amortization of debt issuance costs	0.01		—		0.01		—
Certain legal expense	—		0.01		0.01		0.02
Tax planning expense	—		—		—		—
Income tax-effect of non-GAAP items	(0.03)		(0.02)		(0.03)		(0.05)
Total non-GAAP items	0.13		0.07		0.21		0.14
Non-GAAP net income per share:
Basic	$	0.26	$	0.21	$	0.51	$	0.42
Diluted	$	0.25	$	0.21	$	0.49	$	0.41
Weighted average shares used in computing net income per share:
Basic	72,161		72,009		71,916		72,777
Diluted	75,651		73,117		74,432		74,109

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 and to facilitate comparison of operating results across reporting periods. 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 June 30, 2026		As of December 31, 2025
ASSETS
Current assets:
Cash and cash equivalents	$	54,679	$	71,139
Marketable securities	302,669		306,714
Accounts receivable, net of allowances of $19 and $66, respectively	72,242		62,069
Inventory	31,729		18,032
Prepaid expenses and other current assets	21,882		18,000
Total current assets	483,201		475,954
Property and equipment, net	49,337		50,221
Goodwill	47,902		15,134
Intangible assets, net	14,226		6,259
Deferred tax assets, net	65,785		62,109
Other non-current assets	17,228		20,136
Total assets	$	677,679	$	629,813
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	25,221	$	11,694
Accrued and other liabilities	36,550		41,132
Deferred revenue, current	93,230		80,824
Short-term debt, net	219,518		—
Total current liabilities	374,519		133,650
Deferred revenue, non-current	61,596		61,982
Long-term debt, net	—		218,787
Other non-current liabilities	3,598		3,848
Total liabilities	439,713		418,267
Stockholders' equity:
Common stock, $0.00001 par value: 500,000 shares authorized; 93,176 and 91,996 shares issued and 72,454 and 71,498 shares outstanding, respectively	1		1
Treasury stock, at cost: 20,722 and 20,498 shares, respectively	(254,787)		(249,912)
Additional paid-in-capital	551,863		531,790
Dividends paid	(81,415)		(72,785)
Accumulated other comprehensive income (expense)	(403)		659
Retained earnings	22,707		1,793
Total stockholders' equity	237,966		211,546
Total liabilities and stockholders' equity	$	677,679	$	629,813

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands, on a GAAP Basis)

	Six Months Ended June 30,
	2026		2025
Cash flows from operating activities:
Net income	$	20,914	$	20,081
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,418		7,077
Stock-based compensation	13,787		10,427
Other non-cash items	2,108		685
Changes in operating assets and liabilities:
Accounts receivable	(10,130)		24,031
Inventory	(13,779)		1,609
Prepaid expenses and other assets	(6,097)		(5,865)
Accounts payable	12,271		(6,379)
Accrued and other liabilities	(7,990)		(5,937)
Deferred revenue	11,844		(6,345)
Net cash provided by operating activities	31,346		39,384
Cash flows from investing activities:
Proceeds from sales and maturities of marketable securities	115,420		54,744
Purchases of marketable securities	(112,224)		(68,148)
Acquisition of businesses, net of cash acquired	(34,681)		(19,100)
Capital expenditures	(4,530)		(8,737)
Net cash used in investing activities	(36,015)		(41,241)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee equity incentive plans	1,714		1,710
Proceeds from the issuance of convertible notes	—		225,000
Payment of debt issuance costs	—		(7,330)
Repurchase of common stock	(4,875)		(50,973)
Payments for dividends	(8,630)		(8,755)
Net cash provided by (used in) financing activities	(11,791)		159,652
Net increase (decrease) in cash and cash equivalents	(16,460)		157,795
Cash and cash equivalents—beginning of period	71,139		95,129
Cash and cash equivalents—end of period	$	54,679	$	252,924
Non-cash investing and financing activities:
Transfers between inventory and property and equipment	$	82	$	314
Capital expenditures included in accounts payable	$	881	$	289
Common stock consideration for acquisition	$	5,035	$	—
Supplemental cash flow disclosure:
Cash paid for income taxes, net	$	3,340	$	2,769
Cash paid for interest on debt	$	3,094	$	—

A10 NETWORKS, INC.

RECONCILIATION OF GAAP GROSS PROFIT TO NON-GAAP GROSS PROFIT

(unaudited, in thousands, except percentages)

	Three Months Ended June 30,						Six Months Ended June 30,
	2026			2025			2026			2025
GAAP gross profit	$	63,381		$	54,711		$	123,105		$	107,406
GAAP gross margin	79.1		%	78.9		%	79.4		%	79.3		%
Non-GAAP adjustments:
Stock-based compensation and related payroll tax	612			502			1,021			1,148
Amortization of acquired intangible assets	340			281			621			431
Non-GAAP gross profit	$	64,333		$	55,494		$	124,747		$	108,985
Non-GAAP gross margin	80.3		%	80.0		%	80.4		%	80.4		%

A10 NETWORKS, INC.

RECONCILIATION OF GAAP TOTAL OPERATING EXPENSES

TO NON-GAAP TOTAL OPERATING EXPENSES

(unaudited, in thousands)

	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
GAAP total operating expenses	$	54,357	$	44,400	$	101,082	$	88,317
Non-GAAP adjustments:
Stock-based compensation and related payroll tax	(8,680)		(4,084)		(13,321)		(9,730)
Acquisition-related expense	(1,346)		(210)		(1,346)		(554)
Amortization of acquired intangible assets	(113)		(99)		(211)		(152)
Certain legal expense	(310)		(721)		(807)		(1,247)
Tax planning expense	—		(150)		—		(150)
Non-GAAP total operating expenses	$	43,908	$	39,136	$	85,397	$	76,484

A10 NETWORKS, INC.

RECONCILIATION OF GAAP INCOME FROM OPERATIONS

TO NON-GAAP OPERATING INCOME

(unaudited, in thousands, except percentages)

	Three Months Ended June 30,						Six Months Ended June 30,
	2026			2025			2026			2025
GAAP income from operations	$	9,024		$	10,311		$	22,023		$	19,089
GAAP operating margin	11.3		%	14.9		%	14.2		%	14.1		%
Non-GAAP adjustments:
Stock-based compensation and related payroll tax	9,292			4,586			14,342			10,878
Acquisition-related expense	1,346			210			1,346			554
Amortization of acquired intangible assets	453			380			832			583
Certain legal expense	310			721			807			1,247
Tax planning expense	—			150			—			150
Non-GAAP operating income	$	20,425		$	16,358		$	39,350		$	32,501
Non-GAAP operating margin	25.5		%	23.6		%	25.4		%	24.0		%

A10 NETWORKS, INC.

RECONCILIATION OF GAAP NET INCOME TO

EBITDA AND ADJUSTED EBITDA (NON-GAAP)

(unaudited, in thousands, except percentages)

	Three Months Ended June 30,						Six Months Ended June 30,
	2026			2025			2026			2025
GAAP net income	$	8,882		$	10,538		$	20,914		$	20,081
GAAP net income margin	11.1		%	15.2		%	13.5		%	14.8		%
Exclude: Interest and other income, net	(899)			(1,618)			(2,124)			(3,318)
Exclude: Depreciation and amortization	4,449			3,681			8,418			7,280
Exclude: Provision for income taxes	1,041			1,391			3,233			2,326
EBITDA	13,473			13,992			30,441			26,369
Exclude: Stock-based compensation and related payroll tax	9,292			4,586			14,342			10,878
Exclude: Acquisition-related expense	1,346			210			1,346			554
Exclude: Certain legal expense	310			721			807			1,247
Exclude: Tax planning expense	—			150			—			150
Adjusted EBITDA	$	24,421		$	19,659		$	46,936		$	39,198
Adjusted EBITDA margin	30.5		%	28.3		%	30.3		%	28.9		%

EX-99.2

Q2 2026 Financial Results and Commentary August 5, 2026

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 dividends and capital return, demand and market trends, strategy and competitive positioning, financial performance and profitability, supply chain management, and 2026 financial guidance. 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, 2026. 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 acquired intangible assets, (iv) amortization of debt issuance costs, (v) certain legal expense, (vi) tax planning expense and (vii) income tax effect of non-GAAP items (i) to (vi) 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 acquired 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 acquired intangible assets, (iv) certain 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 acquired intangible assets, (iv) certain 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, net, (ii) depreciation and amortization expense, (iii) provision for income taxes, (iv) stock-based compensation and related payroll tax, (v) acquisition- related expense, (vi) certain 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 Q2 and YTD 2026 Overview 2026 Outlook

Q2’26: Profitable Growth, Durable Secular Catalysts Consistent Profitability Key TakeawaysRevenue Overview Q2 Revenue increased 15.5% year-over-year, with 1H revenue growing 14.5% on YTD basis Security-led revenue continues to exceed long-term target Non-GAAP gross margins of 80.3% Adjusted EBITDA margins of 30.5% Non-GAAP EPS of $0.25 (diluted) Increasing relevance supporting next-generation infrastructure and applications, including AI Completed acquisition of TrojAI and signed long-term agreement with Microsoft See Appendix for reconciliation to most comparable GAAP financial measures.

2026 Outlook Update Revenue Outlook EPS Outlook Upgrade outlook from previously guided 10-12% FY YoY growth to 12-14% FY YoY growth Upgrade outlook from previously guided 12-14% FY YoY growth to 14-16% FY YoY growth

Revenue and Adjusted EBITDA $69.4 $74.7 $80.4 $75.0 $80.1 Q2'25 Q3'25 Q4'25 Q1'26 Q2'26 Revenue, $ Millions $19.7 $21.9 $24.9 $22.5 $24.4 Q2'25 Q3'25 Q4'25 Q1'26 Q2'26 Adjusted EBITDA, $ Millions $135.5 $155.1 YTD Q2 2025 YTD Q2 2026 Revenue, $ Millions $39.2 $46.9 YTD Q2 2025 YTD Q2 2026 Adjusted EBITDA is a Non-GAAP Financial Measure. See Appendix for reconciliation to most comparable GAAP financial measures. Adjusted EBITDA, $ Millions

Revenue by Customer Vertical $27.8 $26.9 $34.1 $42.2 $48.0 $41.6 $47.8 $46.3 $32.8 $32.1 Q2'25 Q3'25 Q4'25 Q1'26 Q2'26 Revenue, $ Millions Service Provider Enterprise

Revenue by Geography 59% 65% 64% 67% 68% 26% 22% 22% 19% 21% 15% 12% 14% 14% 11% Q2'25 Q3'25 Q4'25 Q1'26 Q2'26 % of Revenue Americas APJ EMEA 68% 20% 12% YTD Q2’26 $155.1 million

Unified Product Architecture What We Do AI Infrastructure Enablement Massive scale traffic management Carrier-grade traffic processing High-performance NAT Application-aware traffic steering East-west load balancing Flexible performance optimization for distributed workloads Multi-layer DDoS mitigation (L3-L7) Web and API protection for modern applications Intelligent & automated threat protection N o w Network Security Next-Generation Networking Legacy Networking AI prompt and traffic routing AI inference securityAI-powered predictive analytics N ex t Common Policy Engine Shared OS & Security Platform Unified Control Plane

Consistent Value Creation Business Model Revenue Growth Capital Allocation

Thank You

A10Networks.com

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) Q1’23 Q2’23 Q3’23 Q4’23 FY 2023 Q1’24 Q2’24 Q3’24 Q4’24 FY 2024 Q1’25 Q2’25 Q3'25 Q4’25 FY 2025 Q1’26 Q2’26 1H’26 Revenue $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 $80.4 $290.6 $75.0 $80.1 $155.1 Non-GAAP Gross Margin % 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% 80.8% 80.6% 80.6% 80.3% 80.4% Non-GAAP Operating Margin % 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% 26.6% 24.9% 25.2% 25.5% 25.4% Adjusted EBITDA (non-GAAP) $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 $24.9 $86.0 $22.5 $24.4 $46.9 Non-GAAP EPS $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 $0.26 $0.90 $0.24 $0.25 $0.49 Ending Cash & Marketable Securities $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 $377.9 $377.9 $369.8 $357.3 $357.3

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. Year Ended Year Ended Year to Date % of Revenue except EPS Q1'24 Q2'24 Q3'24 Q4'24 Dec 31 2024 Q1'25 Q2'25 Q3'25 Q4'25 Dec 31 2025 Q1'26 Q2'26 Jun 30 2026 Gross Margin % - GAAP 81.1% 80.0% 80.5% 79.9% 80.4% 79.7% 78.9% 80.1% 78.7% 79.3% 79.6% 79.1% 79.4% Stock-based compensation 0.8% 0.9% 0.8% 0.7% 0.8% 1.0% 0.7% 0.2% 0.5% 0.6% 0.5% 0.8% 0.7% Amortization expense related to acquisition 0.0% 0.0% 0.0% 0.0% 0.0% 0.2% 0.4% 0.4% 0.3% 0.3% 0.4% 0.4% 0.4% Asset impairment expense 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 1.2% 0.3% 0.0% 0.0% 0.0% Gross Margin % - Non-GAAP 81.9% 80.9% 81.3% 80.6% 81.2% 80.9% 80.0% 80.7% 80.8% 80.6% 80.6% 80.3% 80.4% EPS $ - GAAP 0.13$ 0.13$ 0.17$ 0.24$ 0.67$ 0.13$ 0.14$ 0.17$ 0.14$ 0.57$ 0.17$ 0.12$ 0.28$ Stock-based compensation 0.05 0.06 0.06 0.06 0.23 0.08 0.06 0.07 0.07 0.28 0.07 0.12 0.19 Tax planning expense - 0.01 0.00 - 0.01 - 0.00 - - 0.00 - - - Certain legal expense - 0.00 - - 0.00 0.01 0.01 0.00 0.00 0.02 0.01 0.00 0.01 Asset impairment expense - - - - - - - - 0.01 0.01 - - - Acquisition-related expense - - - - - 0.00 0.00 0.00 0.00 0.01 - 0.02 0.02 Amortization expense related to acquisition - - - - - 0.00 0.01 0.01 0.01 0.02 0.01 0.01 0.01 Amortization of debt issuance costs - - - - - - 0.00 0.00 0.01 0.01 0.00 0.01 0.01 Workforce reduction severance - - - 0.01 0.01 - - - - - - - - Income tax effect of non-GAAP items (0.01) (0.01) (0.02) (0.02) (0.06) (0.02) (0.02) (0.02) 0.04 (0.03) (0.01) (0.03) (0.03) EPS $ - Non-GAAP 0.17$ 0.17$ 0.21$ 0.31$ 0.86$ 0.20$ 0.21$ 0.23$ 0.26$ 0.90$ 0.24$ 0.25$ 0.49$

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 Year Ended Year Ended Year to Date $ Millions Q1'24 Q2'24 Q3'24 Q4'24 Dec 31 2024 Q1'25 Q2'25 Q3'25 Q4'25 Dec 31 2025 Q1'26 Q2'26 Jun 30 2026 Income from operations $ - GAAP 7.2$ 7.9$ 10.4$ 18.4$ 44.0$ 8.8$ 10.3$ 13.0$ 15.1$ 47.1$ 13.0$ 9.0$ 22.0$ Stock-based compensation and related payroll tax 4.0 4.3 4.5 4.8 17.6 6.3 4.6 5.0 4.9 20.7 5.1 9.3 14.3 Tax planning expense - 0.4 0.1 - 0.5 - 0.2 - - 0.2 - - - Asset impairment expense - - - - - - - - 1.0 1.0 - - - Certain legal expense - 0.1 - - 0.1 0.5 0.7 0.0 0.1 1.3 0.5 0.3 0.8 Acquisition-related expense - - - - - 0.3 0.2 0.1 0.0 0.7 - 1.3 1.3 Amortization of purchased intangible assets - - - - - 0.2 0.4 0.4 0.4 1.3 0.4 0.5 0.8 Workforce reduction severance - - - 1.1 1.1 - - - - - - - - Income from operations $ - Non-GAAP 11.2$ 12.7$ 15.1$ 24.3$ 63.2$ 16.1$ 16.4$ 18.5$ 21.3$ 72.3$ 18.9$ 20.4$ 39.4$ % of Revenue Income from operations % - GAAP 11.9 % 13.2 % 15.7 % 24.8 % 16.8 % 13.3 % 14.9 % 17.4 % 18.7 % 16.2 % 17.3 % 11.3 % 14.2 % Stock-based compensation and related payroll tax 6.6 % 7.2 % 6.8 % 6.5 % 6.7 % 9.5 % 6.6 % 6.6 % 6.1 % 7.1 % 6.7 % 11.6 % 9.2 % Tax planning expense —% 0.7 % 0.1 % —% 0.2 % —% 0.2 % —% —% 0.1 % —% —% —% Asset impairment expense —% —% —% —% —% —% —% —% 1.2 % 0.3 % —% —% —% Certain legal expense —% 0.1 % —% —% 0.0 % 0.8 % 1.0 % 0.0 % 0.1 % 0.5 % 0.7 % 0.4 % 0.5 % Acquisition-related expense —% —% —% —% —% 0.5 % 0.3 % 0.1 % 0.0 % 0.2 % —% 1.7 % 0.9 % Amortization of purchased intangible assets —% —% —% —% —% 0.3 % 0.5 % 0.5 % 0.5 % 0.5 % 0.5 % 0.6 % 0.5 % Workforce reduction severance —% —% —% 1.4 % 0.4 % —% —% —% —% —% —% —% —% Income from operations % - Non-GAAP 18.5 % 21.1 % 22.6 % 32.7 % 24.2 % 24.4 % 23.6 % 24.7 % 26.6 % 24.9 % 25.2 % 25.5 % 25.4 %

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. Year Ended Year Ended Year to Date $ Millions Q1'24 Q2'24 Q3'24 Q4'24 Dec 31 2024 Q1'25 Q2'25 Q3'25 Q4'25 Dec 31 2025 Q1'26 Q2'26 Jun 30 2026 GAAP net income 9.7$ 9.5$ 12.6$ 18.3$ 50.1$ 9.5$ 10.5$ 12.2$ 9.9$ 42.1$ 12.0$ 8.9$ 20.9$ Exclude: Interest income and other income, net (4.0) (3.1) (3.9) (3.1) (14.1) (1.7) (1.6) (1.0) (1.0) (5.3) (1.2) (0.9) (2.1) Exclude: Depreciation & amortization 2.7 2.8 2.7 3.0 11.3 3.6 3.7 3.8 4.0 15.1 4.0 4.4 8.4 Exclude: Provision for income taxes 1.5 1.5 1.8 3.2 8.0 0.9 1.4 1.8 6.2 10.3 2.2 1.0 3.2 EBITDA 9.9 10.7 13.2 21.4 55.3 12.4 14.0 16.8 19.0 62.2 17.0 13.5 30.4 Exclude: Stock-based compensation and related payroll tax 4.0 4.3 4.5 4.8 17.6 6.3 4.6 5.0 4.9 20.7 5.1 9.3 14.3 Exclude: Asset impairment expense - - - - - - - - 1.0 1.0 - - - Exclude: Tax planning expense - 0.4 0.1 - 0.5 - 0.2 - - 0.2 - - - Exclude: Certain legal expense - 0.1 - - 0.1 0.5 0.7 0.0 0.1 1.3 0.5 0.3 0.8 Exclude: Acquisiton-related expense - - - - - 0.3 0.2 0.1 0.0 0.7 - 1.3 1.3 Exclude: Workforce reduction severance - - - 1.1 1.1 - - - - - - - - Adjusted EBITDA - Non-GAAP 13.9$ 15.5$ 17.8$ 27.3$ 74.5$ 19.5$ 19.7$ 21.9$ 24.9$ 86.0$ 22.5$ 24.4$ 46.9$

XML

Cover	Aug. 05, 2026
Cover [Abstract]
Document Type	8-K
Document Period End Date	Aug. 05, 2026
Entity Registrant Name	A10 NETWORKS, INC.
Entity Incorporation, State or Country Code	DE
Entity File Number	001-36343
Entity Tax Identification Number	20-1446869
Entity Address, Address Line One	2300 Orchard Parkway
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	325-8668
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Title of 12(b) Security	Common stock, $0.00001 par value per share
Trading Symbol	ATEN
Security Exchange Name	NYSE
Entity Emerging Growth Company	false
Amendment Flag	false
Entity Central Index Key	0001580808