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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

根据第 13 或 15(d) 条

《1934 年证券交易法》

报告日期（所报告事件的最早日期）：October 29, 2026

______________________

ATI Inc.

（注册人章程中规定的确切名称）

______________________

特拉华州

1-12001

25-1792394

（注册成立所在州或其他司法辖区）

（委员会档案编号）

（美国国税局雇主识别号）

2021 McKinney Avenue,

达拉斯，

德克萨斯州

75201

（主要行政办公室地址）

（邮政编码）

注册人电话号码（包括区号）：(800) 289-7454

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 表备案旨在同时履行注册人根据以下任一规定承担的备案义务，请勾选相应方框（参见下文一般说明 A.2）：


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


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


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


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

根据该法第 12(b) 条注册的证券：

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 $0.10

ATI

纽约证券交易所

请勾选，以说明注册人是否为《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 ☐

如果注册人为新兴成长型公司，请勾选以说明其是否选择不采用《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。 ☐

第 2.02 项。经营业绩和财务状况。

2026 年 10 月 29 日，ATI Inc.（“公司”）发布了一份新闻稿（“业绩新闻稿”），公布其 2026 年第三季度财务业绩。该新闻稿全文作为本 8-K 表当前报告的附件 99.1 提交。

本第 2.02 项披露的信息（包括随附的附件 99.1）仅供提供，不应视为就《1934 年证券交易法》第 18 条而言的“已备案”信息；除非备案文件中明确通过具体引用予以规定，否则不得视为通过引用纳入根据《1933 年证券法》提交的任何备案文件。

第 9.01 项。附件。


(d)	附件 99.1	新闻稿，日期为 10 月 29 日，2026 年。
	附件 104	封面交互式数据文件（嵌入在 Inline XBRL 文档中）。

签名

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

ATI Inc.

签署：

/s/ James Robert Foster

James Robert Foster

高级副总裁、财务主管兼首席财务官

日期：

October 29, 2026

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