A10 Networks (ATEN) investor relations material

Executive summary

• Supplemental proxy materials address recommendations from Glass Lewis and ISS regarding director re-election and executive compensation proposals.

• The Board urges shareholders to vote for all director nominees and for the executive compensation proposal at the April 22, 2026 Annual Meeting.

Voting matters and shareholder proposals

• Glass Lewis recommended withholding support for director Eric B. Singer due to board diversity and prior opposition vote; the Board disagrees and highlights responsive actions.

• ISS recommended voting against the advisory resolution on executive compensation, citing severance for a former CFO; the Board maintains the compensation program is sound.

• Shareholders are encouraged to vote for all five director nominees, for the executive compensation proposal, for annual say-on-pay votes, and for ratification of the external auditor.

Board of directors and corporate governance

• The Board engaged with shareholders representing over 61% of shares and 80% of top 10 holders to address concerns.

• Enhanced disclosure on director overboarding and rotated the Nominating and Corporate Governance Committee chair to improve diversity accountability.

• The Board believes its actions address prior shareholder concerns and that continued withhold recommendations are unwarranted.