144 0002067397 XXXXXXXX LIVE 0001297107 CoastalSouth Bancshares, Inc. 001-42730 400 GALLERIA PKWY SUITE 1900 ATLANTA GA 30339 678-396-4605 Bruderer Ernst W. Officer Common Raymond James and Associates

880 Carillon Parkway St. Petersburg FL 33716

2000 54856.46 11954446 08/31/2026 NYSE Common 01/26/2024 Purchase Issuer N 2000 01/26/2024 Cash N Ernst Bruderer

15 Elizabeth St. Charleston SC 29403

Common 08/10/2026 1000 27564.00 Ernst Bruderer

15 Elizabeth St Charleston SC 29403

Common 08/18/2026 1000 27889.00 Ernst Bruderer

15 Elizabeth St , Charleston , SC 29403

Common 08/26/2026 300 8250.00 Ernst Bruderer

15 Elizabeth St Charleston SC 29405

Common 08/26/2026 1700 46752.00 08/31/2026 Rashida Mitchell, as duly authorized representative of Raymond James & Associates, Inc., as attorney-in-fact for Ernst W Bruderer