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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

\n \n \n \n \n \n

报告日期（最早报告事件日期）：2026年10月21日

BancFirst Corporation

（注册人章程中规定的确切名称）

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n	\n	\n	\n	\n
俄克拉何马州	0-14384	73-1221379
（注册成立的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 N. Broadway Ave.
俄克拉何马城，俄克拉何马州		73102-8405
（主要执行办公室地址）		（邮政编码）

\n \n \n \n \n \n

注册人电话号码（含区号）： 405 270-1086

\n \n \n \n \n \n

不适用

（自上次报告以来如有变更，填写前名称或前地址）

如果本 8-K 表格备案旨在同时履行注册人根据以下任何条款承担的备案义务，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 进行的征集材料（17 CFR 240.14a-12）

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

☐根据《交易法》规则 13e-4(c) 进行的发行人要约收购开始前通信（17 CFR 240.13e-4(c)）

根据该法第12(b)条注册的证券：

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n	\n	\n	\n	\n
各类别证券名称		交易代码		上市交易所名称
普通股，每股面值 $1.00		BANF		纳斯达克全球精选市场

请勾选标记，说明注册人是否为《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 ☐

如果属于新兴成长型公司，请勾选标记，说明注册人是否选择不使用《交易法》第13(a)条规定的、遵守任何新订或修订财务会计准则的延长过渡期。 ☐

第2.02项经营业绩和财务状况。

BancFirst Corporation公布第三季度收益

2026年10月21日，BancFirst Corporation公布了截至2026年9月30日季度的经营业绩。相关新闻稿副本作为附件99.1随本8-K表格提交，并以引用方式全文纳入本报告。

第9.01项财务报表和附件。

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n	\n
(d)	附件。
附件编号	说明
99.1	BancFirst Corporation 于 2026 年 10 月 21 日发布的新闻稿，标题为“BancFirst Corporation 公布第三季度收益”。
104	封面交互式数据文件（嵌入在内联 XBRL 文档中）。

签名

根据《1934 年证券交易法》的要求，注册人已促使下列经正式授权的签署人代表其签署本报告。

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n	\n	\n	\n
			BANCFIRST CORPORATION

日期：	2026 年 10 月 21 日	签署人：	/s/ Hannah Andrus
			Hannah Andrus 执行副总裁首席财务官

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表格 8-K

第2.02项 经营业绩和财务状况。

第9.01项 财务报表和附件。

第2.02项经营业绩和财务状况。

第9.01项财务报表和附件。