X0508 4 2025-09-12 0001743907 Sun Country Airlines Holdings, Inc. SNCY 0001850697 Trousdale William C/O SUN COUNTRY AIRLINES HOLDINGS, INC. 2005 CARGO ROAD MINNEAPOLIS MN 55450 1 SVP, VP FP&A, Treasurer 0 Common Stock, par value $0.01 per share 2025-09-12 4 S 0 1853 13.7629 D 25140 D /s/ Rose Neale, attorney-in-fact for William Trousdale 2025-09-15