Form 4 for CENX CENTURY ALUMINUM CO

Accepted 2026-01-05 00:00:00 ET · period of report 2025-12-31 · accession 0001628280-26-000513 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
M	2026-01-05	2025-12-31+	CENX	Calloway Kenneth L	SVP, Human Resources	A - Grant	$0.00	+23.4K	46.9K	+100%	$0
M	2026-01-05	2025-12-31	CENX	Calloway Kenneth L	SVP, Human Resources	F - Tax	$39.18	-9,192	41.4K	-18%	-$360.1K

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-01-01	A	A	5,238	$0.00	42,902	D	—	—	(F4) Represents RSUs granted to the Reporting Person in connection with the Issuer's 2026-2028 Long-Term Incentive Plan under Rule 16b-3(d), all of which will vest on December 31, 2028, subject to the Plan's terms and conditions. (F5) Includes unvested RSUs granted to the Reporting Person under the Issuer's Long-Term Incentive Plans.
2	Common	Common Stock	2025-12-31	F	D	3,723	$39.18	37,664	D	—	—	(F3) Shares withheld by the Issuer to satisfy tax obligations in connection with the vesting of RSUs previously granted to the Reporting Person on January 1, 2023.
3	Common	Common Stock	2025-12-31	F	D	5,469	$39.18	41,387	D	—	—	(F2) Shares withheld by the Issuer to satisfy tax obligations in connection with the vesting of PSUs granted to the Reporting Person.
4	Common	Common Stock	2025-12-31	A	A	18,150	$0.00	46,856	D	—	—	(F1) Represents shares of common stock acquired by the Reporting Person upon the vesting of PSUs granted in connection with the Issuer's 2023-2025 Long-Term Incentive Plan under Rule 16b-3(d).