Century Aluminum (CENX) director Errol Glasser receives 2,172-share RSU grant

Rhea-AI Filing Summary

Century Aluminum director Errol Glasser reported receiving 2,172 shares of Common Stock as a compensation grant. The filing explains this was an annual award of restricted stock units that fully vested on the grant date rather than an open-market purchase.

After this award, Glasser holds 120,869 shares of Century Aluminum stock directly. This total includes shares issuable from vested RSUs whose settlement has been deferred under an earlier deferral election, meaning some vested units will be converted into shares at a later time instead of immediately.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider GLASSER ERROL

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,172	$0.00	--

Holdings After Transaction: Common Stock — 120,869 shares (Direct, null)

Footnotes (1)

1. Represents annual grant of restricted stock units ("RSUs"), all of which vested on the date of grant. 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.

Key Figures

RSU grant size: 2,172 shares Grant price: $0.00 per share Shares held after grant: 120,869 shares

3 metrics

RSU grant size 2,172 shares Annual restricted stock unit award to director

Grant price $0.00 per share Compensation grant, not open-market purchase

Shares held after grant 120,869 shares Total direct holdings following reported transaction

Key Terms

restricted stock units ("RSUs"), vested RSUs, deferral election

3 terms

restricted stock units ("RSUs") financial

"Represents annual grant of restricted stock units ("RSUs"), all of which vested"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

vested RSUs financial

"Includes shares of common stock issuable pursuant to vested RSUs, the settlement"

deferral election financial

"settlement of which have been deferred pursuant to an annual deferral election"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/17/2026 - 04:43 PM Accepted by SEC EDGAR 06/17/2026 - 04:43 PM Learn about SEC filing dates

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^*

GLASSER ERROL

(Last) (First) (Middle)

C/O CENTURY ALUMINUM COMPANY

1 S. WACKER DRIVE, SUITE 1000

(Street)

CHICAGO ILLINOIS 60606

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026

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

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

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

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	06/15/2026		A		2,172(1)	A	$0	120,869(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 vested on the date of grant.

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/ John DeZee, as attorney in fact for Errol Glasser	06/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Century Aluminum (CENX) director Errol Glasser report?

Errol Glasser reported receiving 2,172 shares of Century Aluminum Common Stock as an annual equity grant. The award was structured as restricted stock units that fully vested on the grant date and represents compensation, not an open-market stock purchase.

Was Errol Glasser’s CENX Form 4 transaction a stock purchase or a grant?

The Form 4 shows a stock grant, not an open-market purchase. Glasser received 2,172 shares through an annual award of restricted stock units, recorded at a price of $0.00 per share, which is typical for compensation-related equity grants to company directors.

How many Century Aluminum (CENX) shares does Errol Glasser hold after this grant?

Following the reported grant, Errol Glasser holds 120,869 Century Aluminum shares directly. This amount includes shares underlying vested restricted stock units whose settlement into actual shares has been deferred under a prior annual deferral election he made.

What are RSUs in the context of the CENX insider filing for Errol Glasser?

In this filing, RSUs are restricted stock units granted as annual director compensation. Glasser’s RSUs fully vested on the grant date, and some represent vested units whose conversion into actual shares has been deferred based on a previously made annual deferral election.

Did Errol Glasser pay anything for the 2,172 Century Aluminum shares received?

No cash payment was reported for the 2,172 shares. The Form 4 lists a transaction price of $0.00 per share, indicating the shares were received as a compensation grant of restricted stock units, rather than purchased in the market.

Does Errol Glasser’s CENX filing mention deferred settlement of RSUs?

Yes. The filing notes that his total holdings include shares issuable from vested restricted stock units whose settlement has been deferred. This reflects an annual deferral election he previously made, delaying when certain vested units convert into actual shares.