# EDGAR Filing Document

**Accession Number:** 0000811596
**File Stem:** 0001193125-26-257628
**Filing Date:** 2026-6
**Character Count:** 26347
**Document Hash:** 0529de00d2a08408571a930ba101f33e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-257628.hdr.sgml**: 20260622

**ACCESSION NUMBER**: 0001193125-26-257628

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 14

**FILED AS OF DATE**: 20260604

**DATE AS OF CHANGE**: 20260604

**EFFECTIVENESS DATE**: 20260604

**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:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-296500
- **FILM NUMBER:** 261065743

**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

**As filed with the Securities and Exchange Commission on June 4, 2026** 

**Registration No. 333-** 

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, DC 20549** 

**FORM S-8** 

**REGISTRATION STATEMENT** 

***UNDER***

***THE SECURITIES ACT OF 1933***

## KAISER ALUMINUM CORPORATION
**(Exact Name of Registrant as Specified in Its Charter)** 

---

| | |
|:---|:---|
| **Delaware** | **94-3030279** |
| **(State or Other Jurisdiction of**<br> **Incorporation or Organization)** | **(I.R.S. Employer**<br> **Identification No.)** |

---

**1550 West McEwen Drive, Suite 500,** 

**Franklin, Tennessee 37067** 

**(Address of Principal Executive Offices Including Zip Code)** 

**Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan** 

**(Full Title of the Plan)** 

**John M. Donnan** 

**Executive Vice President, Chief Administrative Officer and General Counsel** 

**Kaiser Aluminum Corporation** 

**1550 West McEwen Drive, Suite 500,** 

**Franklin, Tennessee 37067** 

**(629) 252-7040** 

**(Name, Address and Telephone Number, Including Area Code, of Agent For Service)** 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☒ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
|  |  | 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 7(a)(2)(B) of the Securities Act. ☐

------

**EXPLANATORY NOTE** 

This Registration Statement on Form S-8 (this "***Registration Statement***") is being filed by Kaiser Aluminum Corporation, a Delaware corporation (the "***Registrant***"), to register an additional 669,086 shares (the "***Additional 2021 Shares***") of the Registrant's common stock, par value $0.01 per share ("***Common Stock***"), that may be issued pursuant to the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan (as amended and restated effective June 4, 2026, the "***Plan***").

The Additional 2021 Shares represent an incremental increase of 395,000 to the shares of Common Stock previously registered for issuance under the Plan pursuant to the Registrant's Registration Statement on Form S-8 (File No. 333-256743), filed with the Securities and Exchange Commission (the "***Commission***") on June 3, 2021 (the "***2021 Registration Statement***") and the Registrant's Registration Statement on Form S-8 (File No. 333-280128), filed with the Commission on June 11, 2024 (collectively with the 2021 Registration Statement, the "***Prior Registration Statements***"), as well as 274,086 shares of Common Stock that have become available under the Plan as a result of forfeiture, cancellation, expiration, withholding or cash settlement of awards under the Plan or the Kaiser Aluminum Corporation 2016 Equity and Incentive Compensation Plan. This Registration Statement relates to securities of the same class as that to which the Prior Registration Statements relate, and is submitted in accordance with General Instruction E to Form S-8 regarding registration of additional securities. Pursuant to such instruction, the contents of the Prior Registration Statements are incorporated by reference and made part of this Registration Statement, except to the extent modified, superseded, or amended by the information set forth herein.

**PART II** 

**INFORMATION REQUIRED IN THE REGISTRATION STATEMENT** 

**Item 3.** **Incorporation of Documents by Reference.** <br>

The Registrant is subject to the informational and reporting requirements of Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the "***Exchange Act***"), and, in accordance therewith, files reports, proxy statements and other information with the Commission. The following documents have been filed by the Registrant with the Commission and are incorporated herein by reference:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The Registrant's [Annual Report on Form 10-K for the fiscal year ended December 31, 2025](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0000811596/000119312526059575/kalu-20251231.htm) (Commission File No. 001-09447), filed on February 19, 2026;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The Registrant's [Quarterly Report on Form 10-Q for the quarter ended March 31, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0000811596/000119312526173882/kalu-20260331.htm) (Commission File No. 001-09447), filed on April 23, 2026;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) The Registrant's Current Reports on Form 8-K (Commission File No. 001-09447), filed on each of the following dates: [January 13, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0000811596/000119312526011824/kalu-20260113.htm) ; [April 13, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0000811596/000119312526152982/kalu-20260413.htm) ; and [June 4, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/811596/000119312526257524/kalu-20260604.htm) ; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) The description of the Common Stock contained in [Exhibit 4.3](http://www.sec.gov/Archives/edgar/data/811596/000081159620000010/ex43-kalux12311910k.htm) to the Registrant's Annual Report on 10-K for the year ended December 31, 2019 (Commission File No. 001-09447), filed on February 25, 2020,
and as amended by any subsequent amendment or report filed for the purpose of updating such description.

All documents filed by the Registrant with the Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act subsequent to the date of this Registration Statement, and prior to the filing of a post-effective amendment that indicates that all securities offered have been sold or that deregisters all securities then remaining unsold, will be deemed to be incorporated by reference in this Registration Statement and to be part hereof from the date of filing of such documents. Any statement contained in any document incorporated or deemed to be incorporated by reference herein will be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded will not be deemed, except as modified or superseded, to constitute a part of this Registration Statement.

------

**Item 8.** **Exhibits.** <br>

---

| | |
|:---|:---|
| **Exhibit<br>Number** | **Description** |
| 4.1 | [Amended and Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registration Statement on Form 8-A, filed by the Registrant on July 6, 2006, File No. 000-52105)](http://www.sec.gov/Archives/edgar/data/811596/000095012906007020/h37345exv3w1.htm). |
| 4.2 | [Certificate of Amendment to Amended and Restated Certificate of Incorporation of the Registrant dated July 2, 2008 (incorporated by reference to Exhibit 3.2 to the Quarterly Report on Form 10-Q, filed by the Registrant on August 7, 2008, File No. 000-52105).](http://www.sec.gov/Archives/edgar/data/811596/000095013408014389/a42679exv3w2.htm) |
| 4.3 | [Certificate of Amendment to Amended and Restated Certificate of Incorporation of the Registrant dated June 2, 2015 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed by the Registrant on June 8, 2015, File No. 000-52105).](http://www.sec.gov/Archives/edgar/data/811596/000081159615000037/certificateofamendment2015.htm) |
| 4.4 | [Certificate of Amendment to Amended and Restated Certificate of Incorporation of the Registrant dated May 26, 2016 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed by the Registrant on May 26, 2016, File No. 001-09447).](http://www.sec.gov/Archives/edgar/data/811596/000081159616000100/certificateofamendment2016.htm) |
| 4.5 | [Certificate of Designation of Series A Junior Participating Preferred Stock of Kaiser Aluminum Corporation, as filed with the Secretary of State of the State of Delaware on April 7, 2016 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed by the Registrant on April 8, 2016, File No. 001-52105).](http://www.sec.gov/Archives/edgar/data/811596/000119312516534744/d176231dex31.htm) |
| 4.6 | [Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed by the Registrant on June 22, 2020, File No. 001-09447).](http://www.sec.gov/Archives/edgar/data/811596/000081159620000039/exhibit31-amendedbylaws.htm) |
| 4.8 | [Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan (amended and restated effective June 4, 2026) (incorporated by reference to Appendix B to the Registrant's Definitive Proxy Statement on Schedule 14A, filed by the Registrant on April 28, 2026, File No. 001-09447).](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/811596/000119312526187425/kalu-20260428.htm) |
| 5.1\* | [Opinion of Counsel](d149196dex51.htm) |
| 23.1\* | [Consent of Independent Registered Public Accounting Firm (Deloitte & Touche LLP)](d149196dex231.htm) |
| 23.2\* | [Consent of Counsel (included in Exhibit 5.1)](d149196dex51.htm) |
| 24.1\* | [Powers of Attorney (included on signature pages)](#sig) |
| 107\* | [Filing Fee Table](d149196dexfilingfees.htm) |

---

\* Filed herewith.

**Item 9.** **Undertakings.** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The undersigned Registrant hereby undertakes:

&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;(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

&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;(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

&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;(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective Registration Statement;

&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;(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

------

*provided*, *however*, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the Registration Statement.

&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;(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof.

&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;(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

------

**SIGNATURES** 

Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Franklin, State of Tennessee, on this 4th day of June, 2026.

---

| | |
|:---|:---|
| **KAISER ALUMINUM CORPORATION** | **KAISER ALUMINUM CORPORATION** |
| By: | /s/ Cherrie I. Tsai |
| Name: | Cherrie I. Tsai |
| Title: | Vice President, Deputy General Counsel & Corporate Secretary |

---

**POWERS OF ATTORNEY** 

KNOW ALL PERSONS BY THESE PRESENTS, that each of the undersigned officers and directors of the Registrant hereby constitutes and appoints Keith A. Harvey, Neal West, John M. Donnan and Cherrie I. Tsai, or any of them, each acting alone, as the true and lawful attorney-in-fact or agent, or attorneys-in-fact or agents, for each of the undersigned, with full power of substitution and resubstitution, and in the name, place and stead of each of the undersigned, to execute and file any and all amendments, including post-effective amendments, supplements and exhibits to this Registration Statement, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing necessary, appropriate or desirable to be done in and about the premises in order to effectuate the same as fully to all intents and purposes as he or she might or could do if personally present, hereby ratifying and confirming all that said attorneys-in-fact and agents, and each of them, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the date indicated.

---

| | | |
|:---|:---|:---|
| **Signature** | **Title** | **Date** |
| /s/ Keith A. Harvey<br> Keith A. Harvey | President, Chief Executive Officer and Chairman of the Board<br> (Principal Executive Officer) | June 4, 2026 |
| /s/ Neal West<br> Neal West | Executive Vice President and Chief Financial Officer<br> (Principal Financial Officer) | June 4, 2026 |
| /s/ Vijai Narayan<br> Vijai Narayan | Vice President, Corporate Controller and Chief Accounting Officer<br> (Principal Accounting Officer) | June 4, 2026 |
| /s/ Michael C. Arnold<br> Michael C. Arnold | Director | June 4, 2026 |
| /s/ David A. Foster<br> David A. Foster | Director | June 4, 2026 |
| /s/ Kimberly T. Glas<br> Kimberly T. Glas | Director | June 4, 2026 |

---

------

---

| | | |
|:---|:---|:---|
| /s/ Richard P. Grimley<br> Richard P. Grimley | Director | June 4, 2026 |
| /s/ James D. Hoffman<br> James D. Hoffman | Director | June 4, 2026 |
| /s/ Glenda J. Minor<br> Glenda J. Minor | Director | June 4, 2026 |
| /s/ Donald J. Stebbins<br> Donald J. Stebbins | Director | June 4, 2026 |
| /s/ Brett E. Wilcox<br> Brett E. Wilcox | Director | June 4, 2026 |

---

## Exhibit 5.1

**Exhibit 5.1**![LOGO](g149196g0603084951491.jpg)

2727 NORTH HARWOOD STREET • DALLAS, TEXAS 75201.1515

TELEPHONE: +1.214.220.3939 • JONESDAY.COM

June 4, 2026

Kaiser Aluminum Corporation

1550 West McEwen Drive, Suite 500

Franklin, Tennessee 37067

Re: <u>Registration Statement on Form S-8 filed by Kaiser Aluminum Corporation</u>

Ladies and Gentlemen

We have acted as counsel for Kaiser Aluminum Corporation, a Delaware corporation (the "Company"), in connection with the registration of an additional 669,086 shares (the "Additional 2021 Shares") of the Company's common stock, par value $0.01 per share ("Common Stock"), that may be issued pursuant to the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan, as amended and restated effective June 4, 2026 (the "2021 Plan").

In connection with the opinion expressed herein, we have examined such documents, records and matters of law as deemed relevant or necessary for purposes of such opinion. Based on the foregoing, and subject to the further limitations, qualifications and assumptions set forth herein, we are of the opinion that the Additional 2021 Shares that may be issued or delivered and sold pursuant to the 2021 Plan and authorized forms of stock option, restricted stock, restricted stock unit or other applicable agreements thereunder (the "Award Agreements") will be, when issued or delivered and sold in accordance with such 2021 Plan and Award Agreements, validly issued, fully paid and nonassessable, provided that the consideration for the Additional 2021 Shares is at least equal to the stated par value thereof.

The opinion expressed herein is limited to the General Corporation Law of the State of Delaware, as currently in effect, and we express no opinion as to the effect of the laws of any other jurisdiction on the opinion expressed herein. In addition, we have assumed that the resolutions authorizing the Company to issue or deliver and sell the Additional 2021 Shares pursuant to the 2021 Plan and Award Agreement will be in full force and effect at all times at which such Additional 2021 Shares are issued or delivered or sold by the Company, and the Company will take no action inconsistent with such resolutions. In rendering the opinion above, we have assumed that each award under the 2021 Plan will be approved by the Board of Directors of the Company or an authorized committee thereof.

We hereby consent to the filing of this opinion as Exhibit 5.1 to the Registration Statement on Form S-8 filed by the Company to effect registration of the Additional 2021 Shares under the Securities Act of 1933 (the "Act"). In giving such consent, we do not thereby admit that we are included in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Securities and Exchange Commission promulgated thereunder.

Very truly yours,<br> /s/ Jones Day<br>

AMSTERDAM • ATLANTA • BEIJING • BOSTON • BRISBANE • BRUSSELS • CHICAGO • CLEVELAND • COLUMBUS • DALLAS • DETROIT • DUBAI • DÜSSELDORF • FRANKFURT • HONG KONG • HOUSTON • IRVINE • LONDON • LOS ANGELES • MADRID • MELBOURNE • MEXICO CITY • MIAMI • MILAN • MINNEAPOLIS • MUNICH • NEW YORK • PARIS • PERTH • PITTSBURGH • SAN DIEGO • SAN FRANCISCO • SÃO PAULO • SHANGHAI • SILICON VALLEY • SINGAPORE • SYDNEY • TAIPEI • TOKYO • WASHINGTON

## Exhibit 23.1

**Exhibit 23.1** 

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM** 

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated February 19, 2026, relating to the consolidated financial statements of Kaiser Aluminum Corporation and subsidiaries and the effectiveness of internal control over financial reporting of Kaiser Aluminum Corporation and subsidiaries, appearing in the Form 10-K of Kaiser Aluminum Corporation for the year ended December 31, 2025.

/s/ Deloitte & Touche LLP

Nashville, Tennessee

June 4, 2026

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

---

| |
|:---|
| **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**S-8**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**KAISER ALUMINUM CORP**  |

---

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **Security Type**  | **Security Class Title**  | **Fee Calculation Rule**  | **Amount Registered**  | **Proposed Maximum Offering Price Per Unit**  | **Maximum Aggregate Offering Price**  | **Fee Rate**  | **Amount of Registration Fee**  |
| 1 | Equity | Common Stock, $0.01 par value per share | Other | 669086 | $182.92 | $122389211.12 | 0.0001381 | $16901.95 |
| Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $122389211.12  |  | $16901.95  |
| Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
| Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $16901.95  |

---

 **Offering Note** <br>

<sup>1</sup> Represents shares of common stock, par value $0.01 per share ("Common Stock"), of Kaiser Aluminum Corporation, a Delaware corporation (the "Company"), issuable pursuant to the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan (as amended and restated on June 4, 2026, the "Plan"). Pursuant to Rule 416 under the Securities Act of 1933 (the "Securities Act"), this registration statement also includes additional shares of Common Stock of the Company for offer or sale under the Plan that become issuable under the Plan by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected without receipt of consideration that increases the number of outstanding shares of the Common Stock. Proposed maximum offering price per unit and maximum aggregate offering price are estimated solely for the purpose of calculating the amount of the registration fee pursuant to Rule 457(c) and Rule 457(h) under the Securities Act, based on the average of the high ($185.42) and low ($180.42) sale prices of the shares of Common Stock as reported on The Nasdaq Stock Market LLC on May 29, 2026, which date is within five business days prior to the filing of this registration statement.

---

| |
|:---|
| |
| **Rule 457(p)** |
| Fee Offset Claims |
| Fee Offset Sources |

---