STATE OF WISCONSIN INVESTMENT BOARD

Position in CENX — Century Aluminum Co

CIK 854157 MADISON, WI

Position in CENX

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$5,883,202

-$931,728 QoQ

Shares Held

100,242

-42.4% QoQ

Ownership

0.101%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

18 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Basic Materials · as of Mar 31, 2026

STATE OF WISCONSIN INVESTMENT BOARD holds $19,476,557 across 3 Aluminum names. CENX ranks #2 (30.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AA	Alcoa Corp	133,581	$8,860,427
2	CENX	Century Aluminum Co This page	100,242	$5,883,202
3	CSTM	Constellium SE	192,552	$4,732,928

18 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$5,883,202	100,242	-42.4%	Shares	Sole	2026-05-15
2025-12-31	$6,814,930	173,939	+36.2%	Shares	Sole	2026-02-17
2025-09-30	$3,749,272	127,700	-37.3%	Shares	Sole	2025-11-14
2025-06-30	$3,668,655	203,588	+34.1%	Shares	Sole	2025-08-14
2025-03-31	$2,816,869	151,771	+8.4%	Shares	Sole	2025-05-15
2024-12-31	$2,551,893	140,060	+82.9%	Shares	Sole	2025-02-14
2024-09-30	$1,243,136	76,595	+21.0%	Shares	Sole	2024-11-14
2024-06-30	$1,060,191	63,295	+31.0%	Shares	Sole	2024-08-14
2024-03-31	$743,429	48,306	-41.3%	Shares	Sole	2024-05-14
2023-09-30	$592,125	82,354	+0.9%	Shares	Sole	2023-11-14
2023-06-30	$711,377	81,580	+21.5%	Shares	Sole	2023-08-14
2023-03-31	$671,270	67,127	+454.6%	Shares	Sole	2023-05-15
2022-06-30	$89,206	12,104	-43.2%	Shares	Sole	2022-08-15
2021-03-31	$376,158	21,300	-31.3%	Shares	Sole	2021-05-17
2020-12-31	$341,930	31,000	-31.3%	Shares	Sole	2021-02-03
2020-09-30	$321,112	45,100	+249.6%	Shares	Sole	2020-11-16
2020-06-30	$91,977	12,900	-40.3%	Shares	Sole	2020-08-12
2020-03-31	$78,192	21,600	—	Shares	Sole	2020-05-06
No filing history on record for this holder in this stock.