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美国
证券交易委员会
华盛顿特区 20549

表格 8-K

当前报告

根据1934年证券交易法第13条或第15(d)条

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报告日期（最早事件报告日期）： 2026年10月19日

COASTALSOUTH BANCSHARES, INC.

(注册人根据其章程指定的全名)

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\n	\n	\n	\n	\n
佐治亚州	001-42730	57-1184730
(州或其他司法管辖区成立)	(委员会文件编号)	(美国国税局雇主识别编号)

400 Galleria Parkway 1900室
亚特兰大, 佐治亚州		30339
(主要执行办公室地址)		(邮政编码)

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注册人的电话号码，包括区号： (678) 396-4605

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(如果自上次报告以来名称或地址有所更改，请填写原名称或原地址)

如果本8-K表格的提交旨在同时满足注册人根据以下任何规定下的提交义务，请在下方适当的方框中打勾：

☐根据证券法第425条规则的书面沟通（17 CFR 230.425）

☐根据交易法第14a-12条规则的征求材料（17 CFR 240.14a-12）

☐根据交易法第14d-2(b)条规则的开始前沟通（17 CFR 240.14d-2(b)）

☐根据交易法第13e-4(c)条规则的开始前沟通（17 CFR 240.13e-4(c)）

根据法案第12(b)条注册的证券：

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\n	\n	\n	\n	\n
每类的名称		交易符号		每类证券注册的交易所名称
面值1.00美元的普通股		COSO		纽约证券交易所

通过勾选方框表明注册人是否根据1933年证券法第405条规则（§ 230.405）或1934年证券交易法第12b-2条规则（§ 240.12b-2）定义的新兴成长公司。

新兴成长公司 ☒

如果为新兴成长公司，请通过勾选方框表明注册人是否选择不使用根据交易法第13(a)条提供的任何新修订的财务会计标准的延长过渡期。☐

项目 2.02 运营结果和财务状况。

2026年10月19日，CoastalSouth Bancshares, Inc.（“公司”）发布了一份新闻稿，宣布其截至2026年9月30日的第三季度运营结果和财务状况。附于此处的99.1号附件是涵盖该公告的新闻稿，并在此引用。

根据表格8-K的一般说明B.2，本8-K表格当前报告第2.02项中提供的信息，包括本文件中的99.1号附录，不得被视为根据1934年《证券交易法》（以下简称“证券交易法”）第18条“提交”的信息，也不受该条规定的责任约束，也不得根据1933年《证券法》（以下简称“证券法”）或证券交易法，通过引用纳入任何提交文件或其他文件，除非在该提交文件或文件中明确通过具体引用说明。

第7.01项：法规FD披露

2026年10月19日，公司发布了用于配合新闻稿的投资者介绍材料（“投资者介绍”）副本。投资者介绍作为本报告的99.2号附录附上。投资者介绍也可在公司网站的“投资者关系”页面上找到（https://www.coastalstatesbank.com）。

根据表格8-K的一般说明B.2，本8-K表格当前报告第7.01项中提供的信息，包括本文件中的99.2号附录，不得被视为根据证券交易法第18条“提交”的信息，也不受该条规定的责任约束，也不得根据证券法或证券交易法，通过引用纳入任何提交文件或其他文件，除非在该提交文件或文件中明确通过具体引用说明。

第9.01项：财务报表和附录

（d）附录

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\n	\n	\n
附录编号		描述
99.1		CoastalSouth Bancshares, Inc. 2026年10月19日的收益公告*
99.2		CoastalSouth Bancshares, Inc. 关于2026年第三季度业绩的投资者介绍*
104		封面页交互式数据文件（嵌入在内联XBRL文档中）

*\t随本文件提交。

签名

根据1934年《证券交易法》的要求，注册人已 duly 促使本报告由下文签署人 duly 授权代表公司签署。

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\n	\n	\n	\n
		CoastalSouth Bancshares, Inc.

日期：2026年10月19日		签署人：	/s/ Anthony P. Valduga
			Anthony P. Valduga
			首席财务官兼首席运营官

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