MILLENNIUM MANAGEMENT LLC

Position in CENX — Century Aluminum Co

CIK 1273087 NEW YORK, NY

Back to CENX Full portfolio

Position in CENX

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

Position Value

$116,653,711

+$61,095,218 QoQ

Shares Held

1,987,625

+40.2% QoQ

Ownership

2.01%

of shares outstanding

% of Portfolio

0.10%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

24 quarters on record

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

Common Shares in CENX Over Time

Shares Held

Position Value (USD)

Derivatives in CENX

reported options exposure · as of Dec 31, 2025

CallValue

CallShares

PutValue

$587,700

PutShares

15,000

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Aluminum

Basic Materials · as of Mar 31, 2026

MILLENNIUM MANAGEMENT LLC holds $228,456,360 across 4 Aluminum names. CENX ranks #1 (51.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CENX	Century Aluminum Co This page	1,987,625	$116,653,711
2	CSTM	Constellium SE	3,470,091	$85,294,836
3	AA	Alcoa Corp	284,594	$18,877,120
4	KALU	Kaiser Aluminum Corp	63,320	$7,630,693

All Filings in CENX

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26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$116,653,711	1,987,625	+40.2%	Shares	Sole	2026-05-15
2025-12-31	$55,558,493	1,418,032	+9353.5%	Shares	Sole	2026-02-17
2025-12-31	$587,700	15,000	-96.6%	Put	Sole	2026-02-17
2025-09-30	$12,996,879	442,673	-13.6%	Shares	Sole	2025-11-14
2025-06-30	$9,235,556	512,517	+1416.3%	Shares	Sole	2025-08-14
2025-03-31	$627,346	33,801	-92.6%	Shares	Sole	2025-05-15
2024-12-31	$8,339,804	457,728	+4301.2%	Shares	Sole	2025-02-14
2024-09-30	$168,792	10,400	-89.1%	Call	Sole	2024-11-14
2024-09-30	$1,544,154	95,142	-61.1%	Shares	Sole	2024-11-14
2024-06-30	$4,093,030	244,360	-81.0%	Shares	Sole	2024-08-14
2024-03-31	$19,779,043	1,285,188	+81.4%	Shares	Sole	2024-05-15
2023-12-31	$8,598,652	708,291	+43.4%	Shares	Sole	2024-02-14
2023-09-30	$3,551,306	493,923	+1779.5%	Shares	Sole	2023-11-14
2023-06-30	$229,152	26,279	-21.0%	Shares	Sole	2023-08-14
2023-03-31	$332,470	33,247	-49.2%	Shares	Sole	2023-05-15
2022-12-31	$535,135	65,420	-52.5%	Shares	Sole	2023-02-14
2022-09-30	$726,691	137,631	-89.7%	Shares	Sole	2022-11-14
2022-06-30	$9,889,147	1,341,811	+471.7%	Shares	Sole	2022-08-15
2022-03-31	$6,174,930	234,699	+176.3%	Shares	Sole	2022-05-16
2021-12-31	$1,406,738	84,948	-86.5%	Shares	Sole	2022-02-14
2021-09-30	$8,484,878	630,846	+154.3%	Shares	Sole	2021-11-15
2021-06-30	$3,197,880	248,090	+7.3%	Shares	Sole	2021-08-16
2021-03-31	$4,081,508	231,116	-80.3%	Shares	Sole	2021-05-17
2020-12-31	$12,934,164	1,172,635	+152.9%	Shares	Sole	2021-02-16
2020-06-30	$3,306,209	463,704	-22.3%	Shares	Sole	2020-08-14
2020-03-31	$2,159,127	596,444	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.