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[Form 4] Century Aluminum Co Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Century Aluminum Co. (CENX) � Form 4 filing (18 Jun 2025)

Director Andrew G. Michelmore reported an annual grant of 7,778 restricted stock units (RSUs) that fully vested on 16 Jun 2025. Because the RSUs vest immediately, they converted into common shares at no cost to the director. To cover tax withholding, 2,333 shares were automatically sold/withheld at $17.36 per share.

After both entries, Michelmore’s direct holdings increased to 89,089 common shares, a net addition of 5,445 shares (approximately 6% growth versus his pre-grant position). No derivative securities were involved, and the filing was made on behalf of the director by attorney-in-fact Paul Sharobeem.

The activity reflects routine board compensation rather than an open-market purchase, but it modestly lifts insider ownership.

Century Aluminum Co. (CENX) � Comunicazione Form 4 (18 giugno 2025)

Il direttore Andrew G. Michelmore ha segnalato una concessione annuale di 7.778 unità azionarie vincolate (RSU) che sono state completamente maturate il 16 giugno 2025. Poiché le RSU maturano immediatamente, sono state convertite in azioni ordinarie senza alcun costo per il direttore. Per coprire la ritenuta fiscale, 2.333 azioni sono state automaticamente vendute/trattenute al prezzo di 17,36 $ per azione.

Dopo queste operazioni, le partecipazioni dirette di Michelmore sono salite a 89.089 azioni ordinarie, con un incremento netto di 5.445 azioni (circa il 6% in più rispetto alla posizione precedente alla concessione). Non sono stati coinvolti strumenti derivati e la comunicazione è stata effettuata per conto del direttore dall’avvocato Paul Sharobeem.

L’operazione riflette una normale remunerazione del consiglio di amministrazione piuttosto che un acquisto sul mercato aperto, ma aumenta leggermente la partecipazione interna.

Century Aluminum Co. (CENX) � Presentación Formulario 4 (18 de junio de 2025)

El director Andrew G. Michelmore reportó una concesión anual de 7.778 unidades de acciones restringidas (RSU) que se otorgaron completamente el 16 de junio de 2025. Dado que las RSU se liberan inmediatamente, se convirtieron en acciones comunes sin costo para el director. Para cubrir la retención de impuestos, 2.333 acciones fueron automáticamente vendidas/retendidas a $17.36 por acción.

Tras ambas operaciones, las tenencias directas de Michelmore aumentaron a 89.089 acciones comunes, una adición neta de 5.445 acciones (aproximadamente un 6% de crecimiento respecto a su posición previa a la concesión). No se involucraron valores derivados y la presentación fue realizada en nombre del director por el apoderado Paul Sharobeem.

La actividad refleja una compensación rutinaria del consejo en lugar de una compra en el mercado abierto, pero incrementa modestamente la propiedad interna.

Century Aluminum Co. (CENX) � Form 4 제출 (2025� 6� 18�)

이사 Andrew G. Michelmore7,778개의 제한 주식 단위(RSU) 연간 부�2025� 6� 16일에 전액 취득되었�� 보고했습니다. RSU갶 즉시 취득되었� 때문�, � 단위들은 이사에게 비용 없이 보통주로 전환되었습니�. 세금 원천징수� 위해 2,333주갶� 주당 $17.36� 자동으로 매도/원천징수되었습니�.

� � 거래 � Michelmore� 직접 보유 주식은 89,089�� 증갶했으며, 이 5,445� 순증갶 (부� 이전 위치 대� � 6% 증갶�)입니�. 파생 증권은 포함되지 않았으며, 제출은 대리인 Paul Sharobeem 변호사갶 이사� 대신하� 이루어졌습니�.

� 활동은 공개 시장 매수갶 아닌 일상적인 이사� 보상� 반영하며, 내부� 지분을 소폭 증갶시킵니�.

Century Aluminum Co. (CENX) � Dépôt du formulaire 4 (18 juin 2025)

Le directeur Andrew G. Michelmore a déclaré une attribution annuelle de 7 778 unités d’actions restreintes (RSU) qui ont entièrement acquis leurs droits le 16 juin 2025. Comme les RSU sont acquises immédiatement, elles ont été converties en actions ordinaires sans coût pour le directeur. Pour couvrir la retenue d’impôt, 2 333 actions ont été automatiquement vendues/retenues à 17,36 $ par action.

Après ces opérations, les avoirs directs de Michelmore ont augmenté pour atteindre 89 089 actions ordinaires, soit une augmentation nette de 5 445 actions (environ 6 % de croissance par rapport à sa position avant l’attribution). Aucun instrument dérivé n’a été impliqué et le dépôt a été effectué au nom du directeur par le mandataire Paul Sharobeem.

Cette activité reflète une rémunération habituelle du conseil d’administration plutôt qu’un achat sur le marché ouvert, mais elle augmente légèrement la détention d’initiés.

Century Aluminum Co. (CENX) � Form 4 Meldung (18. Juni 2025)

Direktor Andrew G. Michelmore meldete eine jährliche Zuteilung von 7.778 Restricted Stock Units (RSUs), die am 16. Juni 2025 vollständig unverfallbar wurden. Da die RSUs sofort unverfallbar sind, wurden sie ohne Kosten für den Direktor in Stammaktien umgewandelt. Zur Deckung der Steuerabzüge wurden 2.333 Aktien automatisch zum Preis von 17,36 $ pro Aktie verkauft/einbehalten.

Nach diesen Vorgängen erhöhte sich Michelmores Direktbestand auf 89.089 Stammaktien, eine Nettozunahme von 5.445 Aktien (etwa 6 % Wachstum gegenüber seiner Position vor der Zuteilung). Es waren keine Derivate beteiligt, und die Meldung wurde im Namen des Direktors durch den Bevollmächtigten Paul Sharobeem eingereicht.

Die Aktivität spiegelt eine routinemäßige Vorstandsvergütung wider und nicht einen Kauf am offenen Markt, erhöht jedoch leicht den Insiderbesitz.

Positive
  • Director’s holdings rise by 5,445 shares, indicating increased insider alignment with shareholders.
Negative
  • None.

Insights

TL;DR: Routine RSU grant; small net share increase, limited market impact.

The Form 4 shows a standard annual equity grant to a non-executive director. Immediate vesting and share withholding for taxes are normal mechanics. Net addition of 5,445 shares (~US$95k) is immaterial to Century Aluminum’s float and unlikely to sway valuation. Nonetheless, the director chose to retain most of the award, signaling continued alignment with shareholder interests. Overall sentiment: mildly positive but not price-moving.

Century Aluminum Co. (CENX) � Comunicazione Form 4 (18 giugno 2025)

Il direttore Andrew G. Michelmore ha segnalato una concessione annuale di 7.778 unità azionarie vincolate (RSU) che sono state completamente maturate il 16 giugno 2025. Poiché le RSU maturano immediatamente, sono state convertite in azioni ordinarie senza alcun costo per il direttore. Per coprire la ritenuta fiscale, 2.333 azioni sono state automaticamente vendute/trattenute al prezzo di 17,36 $ per azione.

Dopo queste operazioni, le partecipazioni dirette di Michelmore sono salite a 89.089 azioni ordinarie, con un incremento netto di 5.445 azioni (circa il 6% in più rispetto alla posizione precedente alla concessione). Non sono stati coinvolti strumenti derivati e la comunicazione è stata effettuata per conto del direttore dall’avvocato Paul Sharobeem.

L’operazione riflette una normale remunerazione del consiglio di amministrazione piuttosto che un acquisto sul mercato aperto, ma aumenta leggermente la partecipazione interna.

Century Aluminum Co. (CENX) � Presentación Formulario 4 (18 de junio de 2025)

El director Andrew G. Michelmore reportó una concesión anual de 7.778 unidades de acciones restringidas (RSU) que se otorgaron completamente el 16 de junio de 2025. Dado que las RSU se liberan inmediatamente, se convirtieron en acciones comunes sin costo para el director. Para cubrir la retención de impuestos, 2.333 acciones fueron automáticamente vendidas/retendidas a $17.36 por acción.

Tras ambas operaciones, las tenencias directas de Michelmore aumentaron a 89.089 acciones comunes, una adición neta de 5.445 acciones (aproximadamente un 6% de crecimiento respecto a su posición previa a la concesión). No se involucraron valores derivados y la presentación fue realizada en nombre del director por el apoderado Paul Sharobeem.

La actividad refleja una compensación rutinaria del consejo en lugar de una compra en el mercado abierto, pero incrementa modestamente la propiedad interna.

Century Aluminum Co. (CENX) � Form 4 제출 (2025� 6� 18�)

이사 Andrew G. Michelmore7,778개의 제한 주식 단위(RSU) 연간 부�2025� 6� 16일에 전액 취득되었�� 보고했습니다. RSU갶 즉시 취득되었� 때문�, � 단위들은 이사에게 비용 없이 보통주로 전환되었습니�. 세금 원천징수� 위해 2,333주갶� 주당 $17.36� 자동으로 매도/원천징수되었습니�.

� � 거래 � Michelmore� 직접 보유 주식은 89,089�� 증갶했으며, 이 5,445� 순증갶 (부� 이전 위치 대� � 6% 증갶�)입니�. 파생 증권은 포함되지 않았으며, 제출은 대리인 Paul Sharobeem 변호사갶 이사� 대신하� 이루어졌습니�.

� 활동은 공개 시장 매수갶 아닌 일상적인 이사� 보상� 반영하며, 내부� 지분을 소폭 증갶시킵니�.

Century Aluminum Co. (CENX) � Dépôt du formulaire 4 (18 juin 2025)

Le directeur Andrew G. Michelmore a déclaré une attribution annuelle de 7 778 unités d’actions restreintes (RSU) qui ont entièrement acquis leurs droits le 16 juin 2025. Comme les RSU sont acquises immédiatement, elles ont été converties en actions ordinaires sans coût pour le directeur. Pour couvrir la retenue d’impôt, 2 333 actions ont été automatiquement vendues/retenues à 17,36 $ par action.

Après ces opérations, les avoirs directs de Michelmore ont augmenté pour atteindre 89 089 actions ordinaires, soit une augmentation nette de 5 445 actions (environ 6 % de croissance par rapport à sa position avant l’attribution). Aucun instrument dérivé n’a été impliqué et le dépôt a été effectué au nom du directeur par le mandataire Paul Sharobeem.

Cette activité reflète une rémunération habituelle du conseil d’administration plutôt qu’un achat sur le marché ouvert, mais elle augmente légèrement la détention d’initiés.

Century Aluminum Co. (CENX) � Form 4 Meldung (18. Juni 2025)

Direktor Andrew G. Michelmore meldete eine jährliche Zuteilung von 7.778 Restricted Stock Units (RSUs), die am 16. Juni 2025 vollständig unverfallbar wurden. Da die RSUs sofort unverfallbar sind, wurden sie ohne Kosten für den Direktor in Stammaktien umgewandelt. Zur Deckung der Steuerabzüge wurden 2.333 Aktien automatisch zum Preis von 17,36 $ pro Aktie verkauft/einbehalten.

Nach diesen Vorgängen erhöhte sich Michelmores Direktbestand auf 89.089 Stammaktien, eine Nettozunahme von 5.445 Aktien (etwa 6 % Wachstum gegenüber seiner Position vor der Zuteilung). Es waren keine Derivate beteiligt, und die Meldung wurde im Namen des Direktors durch den Bevollmächtigten Paul Sharobeem eingereicht.

Die Aktivität spiegelt eine routinemäßige Vorstandsvergütung wider und nicht einen Kauf am offenen Markt, erhöht jedoch leicht den Insiderbesitz.

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*
Michelmore Andrew G

(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 91,422 D
Common Stock 06/16/2025 F 2,333(2) D $17.36 89,089 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. Represents shares withheld by the Issuer upon vesting of the RSUs to satisfy tax obligations.
Remarks:
/s/ Paul Sharobeem, as attorney in fact for Andrew Michelmore 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

How many Century Aluminum (CENX) shares did Director Andrew Michelmore acquire?

He received 7,778 RSUs, resulting in a net increase of 5,445 common shares after tax withholding.

What was the transaction date on the Form 4 filing for CENX?

Both the RSU grant and the share withholding occurred on 16 June 2025.

At what price were shares withheld to cover taxes?

Shares were withheld at $17.36 per share.

What is the director’s total ownership after the reported transactions?

Andrew G. Michelmore now directly owns 89,089 CENX common shares.

Does the Form 4 indicate any derivative security activity?

No. No options, warrants, or other derivatives were reported in Table II.
Century Alum Co

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CENX Stock Data

1.81B
52.15M
44.61%
58.72%
5.53%
Aluminum
Primary Production of Aluminum
United States
CHICAGO