[144] Century Aluminum Co SEC Filing

Rhea-AI Filing Summary

Century Aluminum Co (CENX) filed a Form 144 notifying a proposed sale of 12,027 common shares through Charles Schwab with an aggregate market value of $277,102.08. The notice lists 93,339,121 shares outstanding and an approximate sale date of 08/12/2025 on NASDAQ.

The shares were acquired via restricted stock unit vesting: 8,956 shares on 12/31/2021 and 3,071 shares on 12/31/2024. The filer reports no securities sold during the past three months and attests there is no undisclosed material adverse information.

Insights

Securities Analyst

TL;DR Routine Rule 144 notice for an insider-originated position; size appears immaterial to outstanding shares.

The filing documents a proposed sale of 12,027 common shares acquired via RSU vesting in 2021 and 2024. The notice lists the broker as Charles Schwab and an approximate sale date of 08/12/2025. There are no reported sales in the prior three months. From a market-impact perspective, the disclosed quantity and aggregate value are modest relative to the issuer's reported outstanding shares, suggesting limited immediate price pressure.

Corporate Governance Expert

TL;DR Filing indicates compliance with Rule 144 and documents the economic origin of the shares (RSU vesting).

The Form 144 clearly states that the shares were received through RSU vesting on specified dates and that the filer affirms no undisclosed material adverse information. This transparency aligns with disclosure norms for insider-related sales and provides investors with provenance and timing details for the proposed disposition.

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	Charles Schwab Corp. 3000 Schwab Way Westlake TX 76262	12027	277102.08	93339121	08/12/2025	NASDAQ

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	12/31/2021	RSU Vesting	Issuer			8956	12/31/2021	N/A
Common	12/31/2024	RSU Vesting	Issuer			3071	12/31/2024	N/A

* 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 did Century Aluminum (CENX) disclose in this Form 144?

The company filed a notice to sell 12,027 common shares through Charles Schwab, with an aggregate market value of $277,102.08 and an approximate sale date of 08/12/2025.

How were the shares to be sold acquired?

The shares were acquired via RSU vesting: 8,956 shares on 12/31/2021 and 3,071 shares on 12/31/2024.

Who is the broker handling the proposed sale?

The notice lists the broker as Charles Schwab Corp., 3000 Schwab Way, Westlake, TX 76262.

Did the filer report any securities sold in the past three months?

No. The Form 144 states "Nothing to Report" for securities sold during the past three months.

What attestation did the filer make in the remarks?

The filer represents by signing that they do not know any material adverse information about the issuer that has not been publicly disclosed.