Peter A. Trpkovski - Jul 1, 2023 Form 3 Insider Report for CENTURY ALUMINUM CO (CENX)

Role: SVP, Finance and Treasurer
Signature: /s/ Paul Sharobeem, as attorney in fact for Peter A. Trpkovski
Stock symbol: CENX
Transactions as of: Jul 1, 2023
Transactions value $: $0
Form type: 3
Date filed: 7/3/2023, 07:05 PM
Next filing: Jan 2, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	CENX	Common Stock						55.9K	Jul 1, 2023	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes the following: (i) 13,908 shares of common stock acquired by the Reporting Person, (ii) 3,443 unvested Time Vested Stock Units ("TVSUs") granted to the Reporting Person pursuant to the Issuer's 2021-2023 Long-Term Incentive Plan, all of which will vest on March 25, 2024; (iii) 1,585 unvested TVSUs granted to the Reporting Person pursuant to the Issuer's 2022-2024 Long-Term Incentive Plan, all of which will vest on January 1, 2025; (iv) 9,130 unvested TVSUs granted to the Reporting Person pursuant to the Issuer's 2023-2025 Long-Term Incentive Plan, all of which will vest on January 1, 2026, and (v) 27,840 unvested TVSUs granted to the Reporting Person on February 9, 2023, which will vest in three equal instalments on each of the first, second and third anniversary dates of the grant date.

Content

Includes the following: (i) 13,908 shares of common stock acquired by the Reporting Person, (ii) 3,443 unvested Time Vested Stock Units ("TVSUs") granted to the Reporting Person pursuant to the Issuer's 2021-2023 Long-Term Incentive Plan, all of which will vest on March 25, 2024; (iii) 1,585 unvested TVSUs granted to the Reporting Person pursuant to the Issuer's 2022-2024 Long-Term Incentive Plan, all of which will vest on January 1, 2025; (iv) 9,130 unvested TVSUs granted to the Reporting Person pursuant to the Issuer's 2023-2025 Long-Term Incentive Plan, all of which will vest on January 1, 2026, and (v) 27,840 unvested TVSUs granted to the Reporting Person on February 9, 2023, which will vest in three equal instalments on each of the first, second and third anniversary dates of the grant date.