# EDGAR Filing Document

**Accession Number:** 0000811596
**File Stem:** 0001193125-25-209051
**Filing Date:** 2025-9
**Character Count:** 11249
**Document Hash:** 71315fc83ea8e890ed3534cbf4ae0f8f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-209051.hdr.sgml**: 20250919

**ACCESSION NUMBER**: 0001193125-25-209051

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20250918

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250919

**DATE AS OF CHANGE**: 20250919

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** KAISER ALUMINUM CORP
- **CENTRAL INDEX KEY:** 0000811596
- **STANDARD INDUSTRIAL CLASSIFICATION:** ROLLING DRAWING & EXTRUDING OF NONFERROUS METALS [3350]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 943030279
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-09447
- **FILM NUMBER:** 251326793

**BUSINESS ADDRESS:**
- **STREET 1:** 1550 W. MCEWEN DRIVE, SUITE 50
- **CITY:** FRANKLIN
- **STATE:** TN
- **ZIP:** 37067
- **BUSINESS PHONE:** 949-614-1740

**MAIL ADDRESS:**
- **STREET 1:** 1550 W. MCEWEN DRIVE, SUITE 50
- **CITY:** FRANKLIN
- **STATE:** TN
- **ZIP:** 37067

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KAISERTECH LTD
- **DATE OF NAME CHANGE:** 19901122

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

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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):** September 18, 2025<br>

------

KAISER ALUMINUM CORPORATION

**(Exact name of Registrant as Specified in Its Charter)**

------

---

| | | |
|:---|:---|:---|
| Delaware | 1-09447 | 94-3030279 |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| 1550 West McEwen Drive<br>Suite 500 |  |  |
| Franklin**,** Tennessee |  | 37067 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

---

**Registrant's Telephone Number, Including Area Code:** (629) 252-7040<br>

Not Applicable

**(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:

☐Written communications 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 communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications 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:**

---

| | | |
|:---|:---|:---|
| **<br>Title of each class** | **Trading<br>Symbol(s)** | **<br>Name of each exchange on which registered** |
| Common stock, par value $0.01 per share | KALU | Nasdaq Global Select Market |

---

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

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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

On September 18, 2025, the board of directors (the "Board") of Kaiser Aluminum Corporation (the "Company") appointed James D. Hoffman as a director. Mr. Hoffman, 67, served as Chief Executive Officer of Reliance, Inc., formerly known as Reliance Steel and Aluminum Co., the largest metals service center company in North America, from January 2019 to December 2022 and as President from January 2019 to January 2021. Mr. Hoffman also served on the board of directors of Reliance, Inc. from October 2019 to December 2022. Mr. Hoffman holds a Bachelor of Science degree in Advertising/Marketing from West Virginia University.

The Board appointed Mr. Hoffman as a director because of his extensive metals and distribution industry and operational experience. Mr. Hoffman has over 43 years of operational and mergers and acquisition experience in metals distribution, fabrication, and service center industries, specializing in carbon steels, alloys, aluminum and stainless product, as well as approximately three decades of executive experience in strategy development, acquisitions and converting strategic plans into tactical initiatives for both domestic and international companies. Mr. Hoffman will serve as a Class II director with a term expiring at the Company's 2026 annual meeting of stockholders and will serve on the Board's compensation and nominating and corporate governance committees. Mr. Hoffman will receive the standard compensation paid to non-employee directors. Mr. Hoffman's annual cash retainer and annual grant of restricted stock for service until the 2026 annual meeting of stockholders will be prorated to reflect service on the Board of less than one full year.

A copy of the press release announcing the appointment of Mr. Hoffman is attached hereto as Exhibit 99.1 and incorporated herein by reference.

**Item 9.01 Financial Statements and Exhibits.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) *Exhibits.* 

---

| | |
|:---|:---|
| Exhibit<br>Number | Description |
| 99.1 | [<u>Press release dated September 18, 2025.</u>](kalu-ex99_1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

------

**SIGNATURES**

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.

---

| | | | |
|:---|:---|:---|:---|
|  |  |  | KAISER ALUMINUM CORPORATION<br>(Registrant) |
| Date: | September 19, 2025 | By:  | /s/ John M. Donnan |
|  |  |  | John M. Donnan<br>Executive Vice President, Chief Administrative Officer and General Counsel <br>|

---

------

## Exhibit 99.1

![img29542054_0.jpg](img29542054_0.jpg)

**Kaiser Aluminum Corporation Announces Appointment of James D. Hoffman to its Board of Directors** 

FRANKLIN, Tenn., September 18, 2025 – Kaiser Aluminum Corporation (NASDAQ: KALU) ("Kaiser" or the "Company") today announced that its Board of Directors has appointed James D. Hoffman to serve as an independent director. Mr. Hoffman will serve as a Class II director with a term expiring at the Company's 2026 annual meeting of stockholders and will serve on the Board's compensation and nominating and corporate governance committees.

"We are honored to welcome James Hoffman to our Board of Directors," said Keith A. Harvey, Chairman, President and Chief Executive Officer. "Mr. Hoffman brings over 43 years of extensive experience in the metals distribution, fabrication and service center industries, complemented by a proven track record of strategic insight and visionary leadership. His nearly three decades of executive experience in strategy development, acquisitions and turning strategic visions into results will be instrumental to Kaiser as we further our growth plans. We are confident that his industry knowledge and leadership expertise will be a significant asset as we advance our long-term objectives."

Mr. Hoffman previously served as Chief Executive Officer of Reliance, Inc., formerly known as Reliance Steel and Aluminum Co., a diversified metal solutions provider and the largest metals service center company in North America, from January 2019 until his retirement in December 2022. In addition, he previously served as President of Reliance, Inc. from January 2019 to January 2021, Executive Vice President and Chief Operating Officer from March 2016 to January 2019, Executive Vice President, Operations from May 2015 to March 2016, and Senior Vice President, Operations since 2008. Mr. Hoffman also served on the board of directors of Reliance, Inc. from October 2019 to December 2022. Prior to Reliance, Inc., Mr. Hoffman held various senior management positions with Earl M. Jorgensen Company, one of the country's largest stockers of bar, sheet, plate, tubing and structural steel and aluminum products, acquired by Reliance, Inc. in 2006, from 1991 to 2008, including Executive Vice President and Chief Operating Officer; Vice President, Eastern Region; and District Manager. Mr. Hoffman holds a Bachelor of Science degree in Advertising/Marketing from West Virginia University.

"I'm honored to join the Board of Directors at such an exciting time in Kaiser's journey," added Mr. Hoffman. "I've long admired the Company's strong foundation, forward-looking vision, and commitment to being 'Best in Class'. As Kaiser prepares for its next chapter of growth, I look forward to working alongside the Board and leadership team to help shape strategic priorities, support disciplined execution, and contribute to the Company's success."

**About Kaiser Aluminum Corporation** 

Kaiser Aluminum Corporation, headquartered in Franklin, Tenn., is a leading producer of semi-fabricated specialty aluminum products, serving customers worldwide with highly-engineered

------

solutions for aerospace and high-strength, packaging, general engineering, automotive extrusions, and other industrial applications. The Company's North American facilities produce value-added plate, sheet, coil, extrusions, rod, bar, tube, and wire products, adhering to traditions of quality, innovation, and service that have been key components of the culture since the Company was founded in 1946. The Company's stock is included in the Russell 2000® index and the S&P Small Cap 600® index.

**Available Information** 

For more information, please visit the Company's website at www.kaiseraluminum.com. The website includes a section for investor relations under which the Company provides notifications of news or announcements regarding its financial performance, including Securities and Exchange Commission (SEC) filings, investor events, and earnings and other press releases. In addition, all Company filings submitted to the SEC are available through a link to the section of the SEC's website at www.sec.gov, which includes: Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and Proxy Statements for the Company's annual stockholders' meetings, and other information statements as filed with the SEC. In addition, the Company provides a webcast of its quarterly earnings calls and certain events in which management participates or hosts with members of the investment community.

**Contact:**

Addo Investor Relations

Investors@KaiserAluminum.com

(949) 614-1769

------