[144] CENTURY ALUMINUM CO SEC Filing

Rhea-AI Filing Summary

Century Aluminum Co (CENX) filed a Form 144 notifying a proposed sale of 9,493 shares of common stock, with an aggregate market value of $249,950.69, to be executed on or about 09/25/2025 through Charles Schwab & Co. The shares were acquired as a restricted stock grant on 12/31/2024 in payment for services. There were 93,339,121 shares outstanding reported on the form, so the sale represents approximately 0.0102% of outstanding shares. The filer states no material nonpublic information is known.

Positive

• Disclosure compliance: Form 144 provides required details (shares, acquisition date, nature of acquisition, broker, and approximate sale date)
• Immaterial size: The proposed sale of 9,493 shares equals about 0.0102% of reported outstanding shares, suggesting minimal market impact
• Acquisition as compensation: Shares were acquired via a restricted stock grant for services, indicating the sale is monetizing vested compensation

Negative

• Insider sale: The filing notifies a planned disposition by an insider, which may be perceived negatively by some investors despite small size

Insights

Financial Analyst

TL;DR Routine insider sale of restricted shares for cash; size is immaterial relative to total shares outstanding.

The filing documents a planned disposition of 9,493 shares acquired as compensation, executed through a broker. The aggregate value of roughly $250k is small versus the reported 93.34 million shares outstanding, implying negligible immediate dilution or market impact. There are no sales in the prior three months reported. From a financial-materiality perspective this disclosure is routine and provides transparency about insider liquidity arising from compensation vesting.

Corporate Governance Expert

TL;DR Insider is selling vested compensation shares; the filing meets Rule 144 disclosure requirements and includes the required attestation.

The document shows the shares were a restricted stock grant tied to services and that the filer affirms absence of undisclosed material information. The use of a broker and listing of the approximate sale date aligns with standard compliance practices under Rule 144. No unusual governance concerns or clustered insider transactions are evident from the disclosed data.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Charles Schwab & Co 3000 Schwab Way Westlake TX 76262	9493	249950.69	93339121	09/25/2025	NASDAQ GS

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	12/31/2024	Restricted Stock Grant	Issuer			9493	12/31/2024	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Century Aluminum's (CENX) Form 144 report?

The Form 144 reports a proposed sale of 9,493 common shares valued at $249,950.69, to be sold around 09/25/2025 through Charles Schwab & Co.

How were the shares being sold by CENX acquired?

The shares were acquired on 12/31/2024 as a restricted stock grant from the issuer in payment for services.

Does the Form 144 indicate any recent sales by the filer in the past three months?

No. The filing states "Nothing to Report" for securities sold during the past three months.

What broker is handling the proposed sale in the CENX Form 144?

The sale is to be executed through Charles Schwab & Co located at 3000 Schwab Way, Westlake, TX 76262.

What representation does the filer make about material nonpublic information?

By signing, the filer represents they do not know any material adverse information regarding the issuer that has not been publicly disclosed.