# EDGAR Filing Document

**Accession Number:** 0000811596
**File Stem:** 0001193125-25-284711
**Filing Date:** 2025-11
**Character Count:** 10477
**Document Hash:** efd1d8ed458271464de50121a9997777
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-284711.hdr.sgml**: 20251117

**ACCESSION NUMBER**: 0001193125-25-284711

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20251114

**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**: 20251117

**DATE AS OF CHANGE**: 20251117

**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:** 251491546

**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**

------

## 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):** November 14, 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>

**(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 November 14, 2025, Jason D. Walsh, the Executive Vice President – Manufacturing of Kaiser Aluminum Corporation (the "Company"), notified the Company of his decision to take leave from the Company for health reasons effective as of November 17, 2025. Thomas H. Robb has been appointed as the Company's Senior Vice President – Manufacturing and will assume Mr. Walsh's role.

Mr. Robb, age 50, joined the Company in August 2024 and previously served as the Company's Vice President – Finance and Packaging.

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

## Item 9.01 Financial Statements and Exhibits.

---

| | |
|:---|:---|
| Exhibit<br>Number | Description |
| 99.1 | [<u>Press release dated November 17, 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 |
| Date: | November 17, 2025 | By:  | /s/ Cherrie I. Tsai |
|  |  |  | Cherrie I. Tsai<br>Vice President, Deputy General Counsel and Corporate Secretary |

---

------

## Exhibit 99.1

Exhibit 99.1

**Kaiser Aluminum Corporation Announces Appointment of Thomas H. Robb as SVP - Manufacturing**

November 17, 2025

FRANKLIN, Tenn.--(BUSINESS WIRE)-- Kaiser Aluminum Corporation (NASDAQ: KALU) (the "Company" or "Kaiser Aluminum") today announced that Jason D. Walsh, the Company's Executive Vice President – Manufacturing is taking leave from the Company for health reasons and that Thomas H. Robb has been appointed as the Company's Senior 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. Since joining the Company in 2024, Tom has successfully taken on growing responsibilities in Kaiser's finance and manufacturing organizations. Tom is the ideal internal candidate to step into Jason's role, given his strong background and experience.

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 an MBA from Vanderbilt University as well as a bachelor's degree in business administration from the University of Florida.

**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.

**Forward-Looking Statements**

This press release contains statements based on management's current expectations, estimates and projections that constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 (including the Company's intention to offer the notes, the use of proceeds of such notes offering, and the conditional redemption of the 2028 notes) involving known and unknown risks and uncertainties that may cause actual results, performance or achievements of the Company to be materially different from those expressed

------

or implied. These factors include: (a) the effectiveness of management's strategies and decisions, including strategic investments, capital spending strategies, cost reduction initiatives, sourcing strategies, process and countermeasures implemented to address operational and supply chain challenges, and the execution of those strategies; (b) the execution and timing of strategic investments; (c) general economic and business conditions, including the impact of geopolitical factors and governmental and other actions taken in response, tariffs, cyclicality, reshoring, labor challenges, supply interruptions, scrap availability and pricing, customer operation disruptions, customer inventory imbalances and supply chain issues and other conditions that impact demand drivers in the aerospace/high strength, packaging, general engineering, automotive extrusions and other end markets the Company serves; (d) the Company's ability to participate in mature and anticipated new automotive programs expected to launch in the future and successfully launch new automotive programs; (e) changes or shifts in defense spending due to competing national priorities; (f) pricing, market conditions and the Company's ability to effectively execute its commercial and labor strategies, pass through cost increases, including the institution of surcharges, and flex costs in response to inflation, volatile commodity costs and changing economic conditions; (g) developments in technology; (h) the impact of the Company's future earnings, cash flows, financial condition, capital requirements and other factors on its financial strength and flexibility; (i) new or modified statutory or regulatory requirements; (j) the successful integration of the acquired operations and technologies; (k) stakeholder, including regulator and customer, views regarding the Company's sustainability goals and initiatives and the impact of factors outside of the Company's control on such goals and initiatives; and (l) other risk factors summarized in the Company's reports filed with the Securities and Exchange Commission including the Company's Form 10-K for the year ended December 31, 2024. All information in this release is as of the date of the release. The Company undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the Company's expectations.

![img29542054_0.gif](img29542054_0.gif)Addo Investor Relations<br>Investors@KaiserAluminum.com<br>949-614-1769

Source: Kaiser Aluminum Corporation

------