AG Glencore - Dec 31, 2021 Form 4 Insider Report for CENTURY ALUMINUM CO (CENX)

Role: 10%+ Owner
Signature: GLENCORE AG: By: /s/ Stephan Huber; Name: Stephan Huber; Title: Director
Stock symbol: CENX
Transactions as of: Dec 31, 2021
Transactions value $: $0
Form type: 4
Date filed: 1/4/2022, 05:03 AM
Previous filing: Jul 1, 2021
Next filing: Jul 1, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CENX	Common Stock	Conversion of derivative security		+473K	+4.23%		11.7M	Dec 31, 2021	Direct	F1, F2, F3

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		-4.73K	-7.48%		58.5K	Dec 31, 2021	Common Stock	473K		Direct	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 4,731.31 shares of Series A Convertible Preferred Stock on December 31, 2021.
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 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 indirectly by Glencore International AG and its parent, Glencore plc.