Form 4 Filing for Allegiant plc

This filing is a Form 4 for Allegiant plc, reporting a transaction by Ellen Rubin. On June 4, 2026, 1074 ordinary shares were acquired with a transaction price of $0.00. Following this transaction, the post-transaction shares owned by Ellen Rubin amount to 3711. The filing also includes a Power of Attorney document, effective June 16, 2025, appointing Joseph C. Blasko and Tandra M. Foster as attorneys-in-fact for EDGAR and Section 16 reporting. This power of attorney authorizes them to obtain credentials, manage the EDGAR account, obtain information on company securities, and execute Forms 3, 4, 5, and 144 on behalf of Ellen Rubin.