# EDGAR Filing Document

**Accession Number:** 0000811596
**File Stem:** 0001193125-25-325321
**Filing Date:** 2025-12
**Character Count:** 8804
**Document Hash:** b14c4b9c2c0fadbcdd88c3a3a443f1c3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-325321.hdr.sgml**: 20251219

**ACCESSION NUMBER**: 0001193125-25-325321

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20251218

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251219

**DATE AS OF CHANGE**: 20251218

**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:** 251584630

**BUSINESS ADDRESS:**
- **STREET 1:** 1550 W. MCEWEN DRIVE, SUITE 500
- **CITY:** FRANKLIN
- **STATE:** TN
- **ZIP:** 37067
- **BUSINESS PHONE:** 6292527040

**MAIL ADDRESS:**
- **STREET 1:** 1550 W. MCEWEN DRIVE, SUITE 500
- **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**

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## FORM 8-K

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**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** December 18, 2025<br>

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KAISER ALUMINUM CORPORATION

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

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| | | |
|:---|:---|:---|
| 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)** |

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

**(Former Name or Former Address, if Changed Since Last Report)**

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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:**

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| | | |
|:---|:---|:---|
| **<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 |

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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. ☐

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## Item 8.01 Other Events.
On December 18, 2025, Kaiser Aluminum Corporation (the "Company"), announced that Hugh (Jack) J. Barger, III has been appointed as the Company's Executive Vice President – Sales and Marketing, effective January 1, 2026, as part of the Company's succession planning and transition of the roles and responsibilities of Blain A. Tiffany, the Company's current Executive Vice President – Sales and Marketing, in connection with his anticipated retirement as part of the transition. The Company intends to enter into a transition letter with Mr. Tiffany.

Mr. Barger, age 53, joined the Company in June 2025 as the Company's Senior Vice President – Sales and Marketing and has over 25 years of progressive experience in the metals industry. Prior to joining the Company, Mr. Barger was President of Central Steel & Wire from 2021 to 2024 and previously held the position of Vice President of Sales at Central Steel & Wire. Prior to that Mr. Barger held advancing leadership roles at A.M. Castle & Company. Mr. Barger received a bachelor's degree in Agricultural Education from North Carolina State University and a master's degree from Kent State University.

On December 16, 2025, the Company also appointed Thomas H. Robb, age 50, as the Company's Executive Vice President – Manufacturing. Mr. Robb rejoined the Company in August 2024 as the Company's Vice President – Finance before transitioning to Vice President – Finance and Packaging as he assumed responsibility for the Company's Warrick rolling mill in Evansville, Indiana as the facility has been focused on the completion and start-up of its new coating line. He was recently appointed Senior Vice President – Manufacturing. Mr. Robb has an extensive global background in finance, strategy and operations with more than 20 years of combined international aluminum and metals experience. He has a master's in business administration from Vanderbilt University as well as a bachelor's degree in business administration from the University of Florida.

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

## Item 9.01 Financial Statements and Exhibits.

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

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**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.

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| | | | |
|:---|:---|:---|:---|
|  |  |  | Kaiser Aluminum Corporation |
| Date: | December 18, 2025 | By:  | /s/ Cherrie I. Tsai |
|  |  |  | Cherrie I. Tsai,<br>Vice President, Deputy General Counsel and Corporate Secretary |

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## Exhibit 99.1

Exhibit 99.1

**Kaiser Aluminum Corporation Announces Appointment of Hugh (Jack) J. Barger, III as EVP – Sales and Marketing**

December 18, 2025

FRANKLIN, Tenn.--(BUSINESS WIRE)-- Kaiser Aluminum Corporation (NASDAQ: KALU) (the "Company" or "Kaiser Aluminum") today announced that Hugh (Jack) J. Barger, III has been appointed as the Company's Executive Vice President – Sales and Marketing, effective January 1, 2026. This transition is part of the Company's succession planning with Mr. Barger assuming the role and responsibilities of Blain A. Tiffany, the Company's current Executive Vice President – Sales and Marketing in connection with his anticipated retirement. Mr. Barger joined the Company in June 2025 as the Company's Senior Vice President – Sales and Marketing.

"Since joining the Company, Jack has successfully taken on growing responsibilities in our commercial organization as part of our planned transition. His background and experience make him the ideal candidate to step into Blain's role," said Keith A. Harvey, Chairman, President and Chief Executive Officer.

Mr. Barger brings over 25 years of progressive experience in the metals industry. Prior to joining the Company, he was President at Central Steel & Wire from 2021 to 2024 and previously held the position of Vice President of Sales at Central Steel & Wire. Prior to that, Jack held advancing leadership roles at A.M. Castle & Company. Jack's proven leadership, extensive background and P&L experience at the executive level make him exceptionally well-suited for this role.

**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.

Draft Form 8-K Disclosure:

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