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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): December 19, 2023
Century Aluminum Company
(Exact Name of Registrant as Specified in Charter)

Delaware | 001-34474 | 13-3070826
(State or Other Jurisdiction of Incorporation) | (Commission File Number) | (IRS Employer Identification No.)

One South Wacker Drive |
Suite 1000 |
Chicago |
Illinois | 60606
(Address of Principal Executive Offices) | (Zip Code)
(312) | 696-3101
(Registrant's telephone number, including area code)
N/A
(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:

Title of each class: | Trading Symbol(s) | Name of each exchange on which registered:
Common Stock, $0.01 par value per share | CENX | Nasdaq Stock Market LLC
|  | (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 7.01. Regulation FD Disclosure.
On December 19, 2023, Century Aluminum Company (the “Company”) will host an investor conference call at 11:00 a.m. Eastern time to discuss the U.S. Treasury Department’s recent proposed regulations implementing Section 45X of the Inflation Reduction Act, and the expected impact of the 45X Advanced Manufacturing Tax Credit on the Company. A copy of the Company’s presentation that will be used in connection with the investor conference call is being furnished herewith as Exhibit 99.1.
The information provided pursuant to this Item 7.01, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits

Exhibit Number |  | Description
99.1 |  | Company presentation regarding Inflation Reduction Act – Section 45X

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.

|  |  | CENTURY ALUMINUM COMPANY
Date: | December 19, 2023 | By: | /s/ John DeZee
|  |  | Name: | John DeZee
|  |  | Title: | Executive Vice President, General Counsel and Secretary