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美国

证券交易委员会

华盛顿特区 20549

8-K 表

当前报告

根据《1934 年证券交易法》第 13 条或第 15(d) 条

提交

报告日期（最早报告事件日期）：2026 年 10 月 22 日

1st Source Corporation

（注册人章程中规定的准确名称）


印第安纳州	0-6233	35-1068133
（注册成立所在州或其他司法管辖区）	（委员会档案编号）	（美国国税局雇主识别号）

100 North Michigan Street, South Bend, Indiana 46601

（主要行政办公室地址）（邮政编码）

574-235-2000

（注册人电话号码，包括区号）

不适用

（自上次报告以来如有变更的原名称或原地址）

如果本 8-K 表备案旨在同时履行注册人在以下任一规定下的备案义务，请勾选相应方框：

☐ 根据《证券法》规则 425 进行的书面通信（17 CFR 230.425）

☐ 根据《交易法》规则 14a-12 提交的征求材料（17 CFR 240.14a-12）

☐ 根据《交易法》规则 14d-2(b) 进行的要约开始前通信（17 CFR 240.14d-2(b)）

☐ 根据《交易法》规则 13e-4(c) 进行的要约开始前通信（17 CFR 240.13e-4(c)）

根据该法第 12(b) 条登记的证券：

各类别名称

交易代码

登记所在交易所名称

普通股——无面值

SRCE

纳斯达克股票市场有限责任公司

请勾选以表明注册人是否为《1933 年证券法》规则 405（本章 §230.405）或《1934 年证券交易法》规则 12b-2（本章 §240.12b-2）所定义的新兴成长型公司。新兴成长型公司 ☐

如果是新兴成长型公司，请勾选以表明注册人是否选择不使用《交易法》第 13(a) 条规定的延长过渡期，以遵守任何新的或修订后的财务会计准则。 o

第 2.02 项经营业绩和财务状况。

2026 年 10 月 22 日，1st Source Corporation 发布新闻稿，公布其 2026 年第三季度收益。该新闻稿副本作为附件 99.1 随附，并以引用方式纳入本文。

第 9.01 项财务报表及附件。

附件 99.1： 2026 年 10 月 22 日发布的新闻稿，内容涉及 1st Source Corporation 截至 2026 年 9 月 30 日的第三季度财务业绩。

101 根据 S-T 条例规则 406，封面页采用 Inline XBRL（内联可扩展商业报告语言）格式。

104 封面页交互式数据文件（嵌入 Inline XBRL 文档中并包含在附件 101 内）。

签名

根据《1934年证券交易法》的要求，注册人已正式授权下列签署人代表其签署本报告。


		1st SOURCE CORPORATION
		（注册人）


日期： 2026年10月 22日		/s/ BRETT A. BAUER
		Brett A. Bauer
		财务主管兼首席财务官
		首席会计负责人

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