Anterix (ATEX) Proxy filing summary

Executive summary

• Supplement provides additional information regarding Proposal 3 to amend the 2023 Stock Plan, increasing shares available for issuance by 1.0 million, for the August 4, 2026 annual meeting.

• The Board approved the amendment on June 22, 2026, and recommends shareholders vote in favor.

• ISS recommended voting against Proposal 3, citing the share increase exceeded its benchmarks; the company addresses these concerns with updated data.

Voting matters and shareholder proposals

• Proposal 3 seeks approval to increase the 2023 Stock Plan share pool by 1.0 million shares.

• Shareholders are encouraged to review supplemental information and vote based on complete data.

• Board reiterates recommendation to vote "FOR" Proposal 3.

Board of directors and corporate governance

• The Board considered updated capitalization data as of June 11, 2026, when determining the share increase.

• Directors and certain executive officers are participants in the proxy solicitation.