[Form 4] Century Aluminum Co Insider Trading Activity

Rhea-AI Filing Summary

Century Aluminum Co. (CENX) filed a Form 4 showing that director Jennifer Mary Bush received an annual equity award on 06/16/2025. The grant consists of 7,778 restricted stock units (RSUs) issued at no cost. Following the award, Bush’s direct beneficial ownership rose to 46,872 common shares. The RSUs vest in full on the earlier of (i) the 12-month anniversary of the grant date, (ii) the company’s next regular annual shareholder meeting, or (iii) certain other events stipulated in the award agreement. No derivative securities were involved and no shares were sold. The filing, signed on 06/18/2025, reflects routine board compensation and does not represent an open-market transaction.

Insights

Securities Analyst

TL;DR: Routine RSU grant to CENX director; neutral for valuation and liquidity.

This Form 4 discloses a customary director compensation grant rather than an open-market purchase. Although the 7,778 RSUs marginally increase insider ownership, the position is immaterial to Century Aluminum’s float and does not signal a conviction buy. Dilution impact is de minimis and cash outflow is zero because RSUs are share-settled. Overall, the transaction keeps director–shareholder alignment intact but offers no new insight into operational performance or near-term stock catalysts.

Corporate Governance Expert

TL;DR: Compliant disclosure of standard board equity award; no governance concerns.

The filing meets Section 16 reporting requirements, with the attorney-in-fact signature dated two days after the transaction, well within the two-business-day window. Vesting terms mirror typical director RSU structures, and the deferred settlement of prior vested units is permitted under the company’s compensation policies. No red flags—such as accelerated vesting, option repricing, or unusual trading patterns—are present. Governance impact is therefore neutral.

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^*

Bush Jennifer Mary

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2025

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	06/16/2025		A		7,778(1)	A	$0	46,872(2)	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. Represents annual grant of restricted stock units ("RSUs"), all of which vest in full on the earlier of (i) the 12-month anniversary of the grant date, (ii) the date of the Issuer's next regular annual meeting of stockholders, or (iii) the occurrence of certain other events in accordance with the terms of the award.

2. Includes shares of common stock issuable pursuant to vested RSUs, the settlement of which have been deferred pursuant to an annual deferral election previously made by the Reporting Person.

Remarks:

	/s/ Paul Sharobeem, as attorney in fact for Jennifer Bush	06/18/2025
	** 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.

FAQ

What insider transaction did CENX director Jennifer Bush report?

She received 7,778 restricted stock units as part of her annual director equity compensation on 06/16/2025.

How many Century Aluminum shares does Jennifer Bush own after the transaction?

Her direct beneficial ownership increased to 46,872 common shares.

When will the newly granted RSUs vest?

They vest on the earlier of the 12-month anniversary of the grant, the next annual shareholder meeting, or specified qualifying events.

Was the transaction an open-market purchase?

No. The RSUs were granted at $0 cost as compensation; no shares were bought or sold on the market.

When was the Form 4 for CENX filed with the SEC?

The filing was signed and submitted on 06/18/2025.