A10 Networks, Inc. filed a Form 8-K with the SEC on September 14, 2026, disclosing the appointment of Mary C. Henry as a new member of its Board of Directors, effective October 5, 2026.

Key Highlights

  • Board expansion: The Board of Directors approved an increase in board size from five to six members.
  • New director: Mary C. Henry was appointed to serve as a director, effective October 5, 2026.
  • Term length: Ms. Henry will serve until the Company's 2027 Annual Meeting of Stockholders, or until her successor is elected and qualified, or upon her earlier death, resignation, or removal.
  • No committee assignments yet: Ms. Henry has not yet been appointed to any committees of the Board.
  • Standard compensation: Ms. Henry will receive compensation consistent with the Company's standard arrangements for non-employee directors, as described in the definitive proxy statement filed March 10, 2026.
  • No related-party transactions: According to the filing, there are no transactions involving Ms. Henry that would be required to be reported under Item 404(a) of Regulation S-K.

A10 Networks Adds Sixth Director as Board Expands Ahead of 2027 Annual Meeting

According to the Form 8-K filed by A10 Networks, Inc. (NYSE:ATEN) on September 14, 2026, the company's Board of Directors acted on September 9, 2026, to increase its size from five to six members and to appoint Mary C. Henry as a new director. Her appointment becomes effective October 5, 2026, and her term runs through the Company's 2027 Annual Meeting of Stockholders.

The filing states that there is "no arrangement or understanding between Ms. Henry and any other person pursuant to which Ms. Henry was selected as a director." Her compensation will follow the Company's standard non-employee director compensation framework, details of which were outlined in the definitive proxy statement filed with the SEC on March 10, 2026. The filing also notes that Ms. Henry will enter into the Company's standard form of indemnification agreement, a copy of which was previously filed as Exhibit 10.1 to the Company's Registration Statement on Form S-1 filed with the SEC on March 10, 2014.

As of the filing date, Ms. Henry had not been assigned to any board committees. The filing reports no transactions involving Ms. Henry that would require disclosure under Item 404(a) of Regulation S-K, which covers certain related-party transactions.

What Was Disclosed

A10 Networks disclosed the expansion of its Board of Directors from five to six members and the appointment of Mary C. Henry as a director, effective October 5, 2026, along with her compensation terms and the absence of any related-party transaction disclosures.