Glencore International Ag - Mar 31, 2025 Form 4 Insider Report for CENTURY ALUMINUM CO (CENX)

Role: 10%+ Owner
Signature: GLENCORE INTERNATIONAL AG By: /s/ John Burton Name: John Burton Title: Director By: /s/ Steven Kalmin Name: Steven Kalmin Title: Director
Stock symbol: CENX
Transactions as of: Mar 31, 2025
Transactions value $: $0
Form type: 4
Date filed: 4/1/2025, 07:57 AM
Previous filing: Jan 3, 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CENX	Common Stock	Conversion of derivative security		+3.59K	+0.03%		12.5M	Mar 31, 2025	See Footnote	F1, F2, F3
holding	CENX	Common Stock						27.5M	Mar 31, 2025	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CENX	Series A Convertible Preferred Stock	Conversion of derivative security		-35.9	-0.07%		49.7K	Mar 31, 2025	Common Stock	3.59K		See Footnote	F2, F3

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

Explanation of Responses:

Id	Content
F1	Represents shares of Common Stock acquired upon conversion of 35.93 shares of Series A Convertible Preferred Stock on March 31, 2025.
F2	Each share of Series A Convertible Preferred Stock is convertible into 100 shares of Common Stock at the times and under the circumstances described in the Certificate of Designation for the Series A Convertible Preferred Stock. The Series A Convertible Preferred Stock has no expiration date.
F3	The shares of Common Stock reported in Line 1 of Table I and the shares of Series A Convertible Preferred Stock reported in Table II are held directly by Glencore AG, a direct wholly-owned subsidiary of Glencore International AG, and may be deemed to be indirectly beneficially owned by Glencore International AG. The Common Stock reported on Line 2 of Table I is held directly by Glencore International AG. Glencore International AG is wholly owned by Glencore plc, which may be deemed an indirect beneficial owner of the securities held by Glencore AG and Glencore International AG.