# EDGAR Filing Document

**Accession Number:** 0000811596
**File Stem:** 0001193125-26-006395
**Filing Date:** 2026-1
**Character Count:** 9883
**Document Hash:** 0d458aac75e9f6833593c315a2f05f77
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-006395.hdr.sgml**: 20260107

**ACCESSION NUMBER**: 0001193125-26-006395

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260101

**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**: 20260107

**DATE AS OF CHANGE**: 20260107

**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:** 26516073

**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):** January 01, 2026<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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
As previously disclosed, Kaiser Aluminum Corporation (the "Company") appointed Hugh (Jack) J. Barger, III as 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 former Executive Vice President - Sales and Marketing, in connection with Mr. Tiffany's anticipated retirement. In addition, as part of the planned succession, on January 7, 2026, the Company entered into a transition letter with Mr. Tiffany. Pursuant to the terms of the transition letter, effective January 1, 2026, Mr. Tiffany will (i) serve as the Company's Advisor to the Chief Executive Officer and remain an employee of the Company through December 31, 2026 (the "Transition Period"), (ii) provide transition services through the Transition Period, (iii) continue to receive his base salary and participate in the Company's incentive compensation plans with no change to his short- and long-term incentive targets, (iv) retain his outstanding equity grants under the Company's long-term incentive programs without proration, (v) be entitled to the continuation of customary benefits and (vi) no longer participate in the Kaiser Aluminum Key Employee Severance Benefit Plan.

A copy of the transition letter between the Company and Mr. Tiffany is attached hereto as Exhibits 10.1 and incorporated herein by reference.

## Item 9.01 Financial Statements and Exhibits.

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| | |
|:---|:---|
| Exhibit<br>Number | Description |
| 10.1 | [<u>Transition Letter between the Company and Blain A. Tiffany.</u>](kalu-ex10_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: | January 7, 2026 | By:  | /s/ Cherrie I. Tsai |
|  |  |  | Cherrie I. Tsai<br>Vice President, Deputy General Counsel and Corporate Secretary |

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## Exhibit 10.1

Exhibit 10.1

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| | |
|:---|:---|
| ![img111233637_0.jpg](img111233637_0.jpg) |  |
|  | KEITH A. HARVEYChairman, Chief Executive Officer and President |
|  | January 7, 2026 |

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Blain A. Tiffany

15031 Pinehurst Lane

Punta Gorda, FL 33982

Blain,

Thank you for your help and support facilitating the transition of your role and responsibilities and continuing to support the transition. Your contributions to Kaiser Aluminum Corporation (the "Company") over the course of your career have been invaluable and working together to help ensure a successful and seamless transition of your role and responsibilities is one of our top priorities as we continue to work through our succession plans. With that as background, we wanted to use this opportunity to outline our agreement in regard to the transition.

<u>Effective Date</u>: The effective date of the transition will be January 1, 2026 (the "Effective Date").

<u>Transition of Title and Responsibilities</u>: Upon the Effective Date, the "Company agrees and acknowledges that as a result of the appointment of a new Executive Vice President – Sales and Marketing as your successor all of your outstanding grants of restricted stock units and performance shares under the Company's long-term incentive plans will remain outstanding without proration and otherwise subject to the terms and conditions of those grants.

<u>Continued Employment</u>: Following the Effective Date and as part of our efforts to help ensure a successful transition, we agree that you will remain an employee of the Company or one of its subsidiaries through your retirement on December 31, 2026 (the "Continued Employment Period") as the Company's Advisor to the Chief Executive Officer with no change to your base compensation, incentive compensation targets and benefits. Your final paycheck on December 31, 2026, will include payment through December 31, 2026, at your regular semi-monthly rate. This check will also include your accrued unused 2026 vacation. Except as otherwise contemplated by the terms of the applicable plans and agreements all of your benefits will otherwise end at the end of the Continued Employment Period.

<u>Planned Transition</u>: The Company and you agree that as a result of the planned transition and your resulting retirement as contemplated by this letter, no severance benefits are payable to you and that your participation in the Kaiser Aluminum Corporation Key Employee Severance Benefit Plan will terminate on the Effective Date.

1550 West McEwen Drive

Suite 500

Franklin, TN 37067

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(629) 252-7044

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Thank you for your help and support facilitating the transition of your role and continuing to support the transition. If you have any questions at all, please let me know. Otherwise, please return the signed letter to Jennifer Preston.

Sincerely,

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| | |
|:---|:---|
| /s/ Keith A. Harvey | January 7, 2026 |
| Keith A. Harvey | Date |
| Chairman, President and Chief Executive Officer |  |
| /s/ Blain A. Tiffany | January 7, 2026 |
| Blain A. Tiffany | Date |

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