X0609 4 2026-05-13 true 0001743907 Sun Country Airlines Holdings, LLC SNCY 0001321558 Schoppert Wendy Lee false C/O SUN COUNTRY AIRLINES HOLDINGS, INC. 2005 CARGO ROAD MINNEAPOLIS MN 55450 true false false false false COMMON STOCK 2026-05-13 4 D false 7040 D 0 D On May 13, 2026, pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of January 11, 2026, by and among Sun Country Airlines Holdings, Inc. ("Sun Country" ), Allegiant Travel Company ("Allegiant"), Mirage Merger Sub, Inc. ("Merger Sub 1") and a direct wholly owned subsidiary of Allegiant, Sawdust Merger Sub, LLC ("Merger Sub 2"), a direct wholly owned subsidiary of Allegiant: (a) Merger Sub 1 merged with and into Sun Country (the "First Merger"), with Sun Country surviving the First Merger as a direct wholly owned subsidiary of Allegiant and (b) immediately after the First Merger, Sun Country merged with and into Merger Sub 2, with Merger Sub 2 surviving as a direct, wholly owned subsidiary of Allegiant (the "Second Merger" and, together with the First Merger, the "Mergers"). All terms capitalized but not defined herein shall have the meaning given to them in the Merger Agreement. (Continued from footnote 1) Following consummation of the Mergers, Sun Country Airlines Holdings, Inc. is now known as Sun Country Airlines Holdings, LLC. Reflects each outstanding Sun Country restricted stock unit award ("Company RSU Award") consisting of 7,040 restricted stock units previously granted to the reporting person, which, as of immediately prior to the effective time of the First Merger, such Company RSU Awards became fully vested (to the extent not yet vested) and were cancelled and converted into the right to receive (a) $4.10 in cash, without interest and (b) 0.1557 shares of Allegiant common stock, par value $0.001 per share. /s/ Rose Neale, as attorney-in-fact for Wendy Schoppert 2026-05-15