Century Aluminum Form 4: Officer disposes of 12,027 shares, retains 62,589

Rhea-AI Filing Summary

Matt Aboud, Senior Vice President of Strategy & Business Development at Century Aluminum Co. (CENX), reported a sale of 12,027 shares of the issuer's common stock on 08/12/2025 at a reported price of $23.27 per share. After the transaction, the reporting person beneficially owned 62,589 shares in total. The filing notes that the post-transaction balance includes unvested RSUs granted under the company’s long-term incentive plans. The transaction was reported on a Form 4 as required for officers and other insiders.

Insights

Securities Analyst

TL;DR: A routine officer sale of 12,027 shares at $23.27; remaining holdings include unvested RSUs, suggesting ongoing incentive alignment.

The sale reported by Matt Aboud appears to be a standard insider disposition rather than a change in control or material corporate action. The officer still retains a meaningful position of 62,589 shares, which the filer discloses includes unvested restricted stock units from long-term incentive plans. For investors, the transaction provides transparency on insider liquidity without indicating a reduction to zero ownership or a change in executive status.

Corporate Governance Expert

TL;DR: Proper Form 4 disclosure of an officer sale; presence of unvested RSUs indicates continued compensation linkage to company performance.

The Form 4 properly reports the officer-level sale and remaining beneficial ownership, including unvested awards. The filing does not show accelerated option exercises, derivative transactions, or transfers to affiliates. From a governance perspective, maintaining holdings that include unvested RSUs supports alignment with long-term shareholder interests while permitting limited personal liquidity.

Insider Trade Summary

Net Seller: 12,027 shares ($279,868)

Net Sell 1 txn

Insider Aboud Matt

Role SVP, Strategy & Business Dev't

Sold 12,027 shs ($280K)

Type	Security	Shares	Price	Value
Sale	Common Stock	12,027	$23.27	$280K

Holdings After Transaction: Common Stock — 62,589 shares (Direct)

Footnotes (1)

1. [object Object]

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Aboud Matt

(Last) (First) (Middle)

C/O CENTURY ALUMINUM COMPANY

1 S. WACKER DRIVE, SUITE 1000

(Street)

CHICAGO IL 60606

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CENTURY ALUMINUM CO [ CENX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Strategy & Business Dev't

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/12/2025		S		12,027	D	$23.27	62,589(1)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes unvested RSUs granted to the Reporting Person under the Issuer's Long-Term Incentive Plans.

Remarks:

	/s/ Paul Sharobeem, attorney-in-fact for Matt Aboud	08/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.