# EDGAR Filing Document

**Accession Number:** 0001018963
**File Stem:** 0001193125-26-230739
**Filing Date:** 2026-5
**Character Count:** 6025
**Document Hash:** d9f2986cc5ab04b24f85a7f99542dcef
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-230739.hdr.sgml**: 20260519

**ACCESSION NUMBER**: 0001193125-26-230739

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260514

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260519

**DATE AS OF CHANGE**: 20260519

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ATI INC
- **CENTRAL INDEX KEY:** 0001018963
- **STANDARD INDUSTRIAL CLASSIFICATION:** STEEL PIPE & TUBES [3317]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 251792394
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1228

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-12001
- **FILM NUMBER:** 26998610

**BUSINESS ADDRESS:**
- **STREET 1:** 2021 MCKINNEY AVENUE
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
- **BUSINESS PHONE:** 4123942800

**MAIL ADDRESS:**
- **STREET 1:** 2021 MCKINNEY AVENUE
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ALLEGHENY TECHNOLOGIES INC
- **DATE OF NAME CHANGE:** 19991213

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ALLEGHENY TELEDYNE INC
- **DATE OF NAME CHANGE:** 19960716

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, DC 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): May 19, 2026 (May 14, 2026)

## ATI Inc.

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **1-12001** | **25-1792394** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |
| **2021 McKinney Avenue, Dallas, Texas** | **2021 McKinney Avenue, Dallas, Texas** | **75201** |
| **(Address of principal executive offices)** | **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code (800) 289-7545

#### N/A

#### (Former name or former address, if changed since last report).
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (*see* General Instruction A.2. below):

☐ Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| Common Stock, par value $0.10 per share | ATI | New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 5.07** | **Submission of Matters to a Vote of Security Holders.**  |

---

ATI Inc. (the "Company") held its 2026 Annual Meeting of Stockholders (the "Annual Meeting") on May 14, 2026. As of the record date for the Annual Meeting, 136,462,390 shares of the Company's common stock were issued and outstanding. As disclosed in the Company's proxy materials for the Annual Meeting, the following proposals were considered and voted upon at the Annual Meeting: (1) the election of three directors for three-year terms expiring in 2029; (2) an advisory vote regarding the compensation paid to the Company's named executive officers in 2025; and (3) ratification of the appointment of Ernst & Young LLP as independent auditors for the Company's 2026 fiscal year. Voting results for each such matter are provided below.

1. Election of three Directors:

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **NAME** | **FOR** | **FOR** | **WITHHELD** | **WITHHELD** | **BROKER**<br>**NON-VOTES** | **BROKER**<br>**NON-VOTES** |
|  Kimberly A. Fields |  | 111295983 |  | 1264992 |  | 9154673 |
|  Elizabeth H. Lund |  | 112129164 |  | 431810 |  | 9154673 |
|  David J. Morehouse |  | 103661771 |  | 8899204 |  | 9154673 |

---

2. Advisory vote regarding the 2025 compensation of the Company's named executive officers:

---

| | | | |
|:---|:---|:---|:---|
| **FOR** | **AGAINST** | **ABSTAIN** | **BROKER**<br> **NON-VOTES** |
| 111137226 | 1335023 | 88725 | 9154673 |

---

3. Ratification of the selection of Ernst & Young LLP as the Company's independent auditors for 2026:

---

| | | |
|:---|:---|:---|
| **FOR** | **AGAINST** | **ABSTAIN** |
| 119497355 | 2159163 | 59128 |

---

---

| | |
|:---|:---|
| **Item 9.01** | **Exhibits.**  |

---

(d) Exhibit 104  Cover Page Interactive Data File (embedded within the Inline XBRL document)

------

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | |
|:---|:---|
| ATI Inc. | ATI Inc. |
| By: | /s/ Vaishali S. Bhatia |
|  | Vaishali S. Bhatia |
|  | Senior Vice President, General Counsel and Chief Compliance Officer |

---

Dated: May 19, 2026