Form 4 Filing for Allegiant plc - Officer/Director Stock Transaction

This Form 4 filing details a stock transaction by STEVEN MIZELL, a director at Allegiant plc. On June 5, 2026, Mr. Mizell disposed of 292 ordinary shares at a price of $130.27 per share. This disposal was to cover tax withholding obligations upon the vesting of a restricted stock unit award, as indicated by footnote F1. Following this transaction, Mr. Mizell owns 5711 shares. The filing was signed on June 9, 2026, by Tandra M. Foster, acting as Attorney-In-Fact for Mr. Mizell. The transaction code is "F", indicating a disposition.