Welcome to our dedicated page for A10 Networks SEC filings (Ticker: ATEN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
A10 Networks, Inc. filings document the company’s operating results, capital-return actions, governance matters and executive changes as a public secure networking and cybersecurity provider. Its Form 8-K disclosures include quarterly financial results, Regulation FD presentation materials, board-approved dividend actions and officer departure or compensation arrangements.
Proxy and annual-meeting filings cover director elections, advisory votes on executive compensation, say-on-pay frequency, auditor ratification and stockholder voting outcomes. Together, the filings provide formal records of A10 Networks’ board oversight, compensation governance, common-stock matters and recurring disclosure obligations under the Exchange Act.
A10 Networks, Inc. entered into a material warrant agreement with Microsoft Corporation, granting Microsoft the right to purchase up to 800,000 shares of A10 common stock at $0.01 per share, with vesting tied to Microsoft and its affiliates’ purchases of A10 products and services.
The warrant can vest in two tranches of up to 400,000 shares each, based on purchase thresholds during measurement periods ending June 30, 2027 and June 30, 2028; unearned tranches expire unvested. Vested first-tranche shares are exercisable after January 1, 2028, and second-tranche shares after January 1, 2029, until August 3, 2036, and may be exercised by cash payment or cashless exercise. The warrant includes customary anti-dilution adjustments, transfer restrictions and accelerated vesting in certain change of control transactions, and was issued as an unregistered offering relying on Section 4(a)(2) of the Securities Act of 1933.
First Trust Portfolios L.P., First Trust Advisors L.P. and The Charger Corporation report beneficial ownership of 4,809,261 shares of A10 Networks, Inc. common stock, representing 6.68% of the class. They report shared voting power over 3,310,470 shares and shared dispositive power over 4,809,261 shares, with no sole voting or dispositive power.
The holdings are primarily in unit investment trusts and other managed accounts, and the reporting entities disclaim beneficial ownership. Voting for unit investment trust shares is generally carried out by the trustee, not by the reporting entities.
A10 Networks, Inc. General Counsel Robert Scott Weber reported a routine tax-related share disposition. On July 6, 2026, 1,897 shares of common stock were withheld at $36.30 per share to cover taxes on a restricted stock unit grant that vested on July 5, 2026. After this non-discretionary withholding, he directly holds 64,672 shares, which include 1,042 shares acquired through the company’s Employee Stock Purchase Plan on May 31, 2026.
ATEN notice of proposed sale: a Form 144 lists 5,000 performance shares to be sold on 05/05/2026 through Morgan Stanley Smith Barney LLC. The filing also records a prior sale by Sheen Khoury of 7,000 common shares on 06/10/2026 for $220,929.10.
Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice reporting proposed sales of Common Stock by an issuer-related holder. The excerpt lists proposed dispositions tied to restricted stock and performance share awards dated 05/11/2026, 05/05/2026, and 05/14/2026.
The filing shows quantities of 5,091 shares (restricted stock) and two performance-share entries of 955 and 954 shares respectively. The form lists an NYSE reference and an administrative date of 06/10/2026.
A10 Networks, Inc. Chief Financial Officer Michelle Elizabeth Caron filed an amended insider report to correct a prior tax-withholding entry. The amendment updates the number of shares withheld and the price used for shares retained to cover taxes on a performance-based RSU grant that vested on May 14, 2026.
The corrected record shows 760 shares of common stock were withheld on a non-discretionary basis at $28.03 per share for tax purposes. After this correction, Caron directly owns 35,614 shares of A10 Networks common stock as of May 15, 2026.
A10 Networks, Inc. Chief Executive Officer Dhrupad Trivedi filed an amended insider report to correct the share price used in a prior tax-withholding entry. The amendment reflects 32,858 shares of common stock withheld on a non-discretionary basis at $28.03 per share to satisfy taxes on performance-based restricted stock units that vested on May 14, 2026. After this routine tax-withholding disposition, Trivedi directly holds 887,847 shares of A10 Networks common stock.
A10 Networks, Inc. General Counsel Robert Scott Weber filed an amended insider report updating a prior tax-related share disposition. The filing corrects the price per share reported for 1,930 shares of common stock that were withheld on a non-discretionary basis to cover taxes tied to performance-based restricted stock units that vested on May 14, 2026. These RSUs were granted on February 6, 2025 and February 12, 2026. Following the withholding, Weber directly holds 65,527 shares of A10 Networks common stock.
A10 Networks, Inc. Chief Financial Officer Michelle Elizabeth Caron reported routine equity compensation activity involving performance-based restricted stock units. On May 14, 2026, she exercised performance-based RSUs into 2,989 shares of common stock at $0.00 per share, following achievement of specified stock price performance conditions. These shares remain subject to time-based vesting, with portions vesting on May 14, 2026 and on the first and second anniversaries of April 27, 2026, contingent on continued employment. On May 15, 2026, 748 shares of common stock were automatically withheld at $27.00 per share to cover tax obligations, a non-discretionary tax-withholding disposition rather than an open-market sale. After these transactions, she directly holds 35,626 shares of A10 Networks common stock.
A10 Networks, Inc. CEO Dhrupad Trivedi reported routine equity compensation activity. On May 14, 2026, he exercised performance-based restricted stock units covering 129,164 shares of common stock. On May 15, 2026, 32,858 shares were automatically withheld at $27.00 per share to cover taxes, leaving him with 887,847 common shares held directly.