Form 4 Filing by Vardhan Dev for Allegiant plc

This filing details a transaction where Vardhan Dev acquired 1074 ordinary shares of Allegiant plc on June 4, 2026, with a transaction price of $0.0. This acquisition is part of a restricted stock unit grant that vests on June 4, 2027. Following this transaction, Vardhan Dev holds 5364 ordinary shares. 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. These attorneys are authorized to handle Section 16 reporting requirements, including obtaining EDGAR credentials, managing the EDGAR account, and filing Forms 3, 4, and 5, and Forms 144 on behalf of Vardhan Dev. The Power of Attorney remains in effect until Dev Vardhan is no longer required to file these forms, or until revoked.