0001297107 2026-10-19 2026-10-19 false 0001297107 8-K 2026-10-19 COASTALSOUTH BANCSHARES, INC. GA 001-42730 57-1184730 400 Galleria Parkway Suite 1900 Atlanta GA 30339 (678) 396-4605 false false false false Common Stock, par value $1.00 per share COSO NYSE true false