SEC Filing Form 4

This filing details transactions made by Turner Cameron Bradley, Chief Credit Officer of CoastalSouth Bancshares, Inc. (COSO). On April 27, 2026, Mr. Bradley acquired 4,000 shares of Common Stock through the conversion of Restricted Stock Units (RSUs) with no cost basis. The RSUs converted on a one-for-one basis. Subsequently, on the same day, he disposed of 1,169 shares of Common Stock at a price of $25.59 per share. Following these transactions, his direct ownership of Common Stock stands at 8,831 shares. Additionally, the filing notes his indirect ownership of 7,925 shares of Common Stock held in an IRA. The total post-transaction shares for the acquired shares are 10,000, and for the disposed shares are 8,831. The RSU transaction resulted in 0 shares owned post-transaction, with 4,000 underlying shares of Common Stock. The report was signed on April 29, 2026, by Lauren Hemby, Chief Accounting Officer.