TWO SIGMA INVESTMENTS, LP

Position in CENX — Century Aluminum Co

CIK 1179392 NEW YORK, NY

Back to CENX Full portfolio

Position in CENX

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$1,268,541

+$1,268,541 QoQ

Shares Held

27,571

Ownership

0.028%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#166

of 413 holders

Holding Since

Jun 2021

19 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in CENX Over Time

Shares Held

Position Value (USD)

Derivatives in CENX

reported options exposure · as of Sep 30, 2025

CallValue

CallShares

PutValue

$15,918,992

PutShares

542,200

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 Jun 30, 2026

TWO SIGMA INVESTMENTS, LP holds $48,143,256 across 4 Aluminum names. CENX ranks #4 (2.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	KALU	Kaiser Aluminum Corp	156,166	$30,550,754
2	CSTM	Constellium SE	365,357	$11,643,927
3	AA	Alcoa Corp	89,759	$4,680,034
4	CENX	Century Aluminum Co This page	27,571	$1,268,541

All Filings in CENX

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,268,541	27,571	-66.3%	Shares	Sole	2026-08-14
2025-09-30	$15,918,992	542,200	0.0%	Put	Sole	2025-11-14
2025-06-30	$9,770,444	542,200	0.0%	Put	Sole	2025-08-14
2025-06-30	$1,473,765	81,785	-57.5%	Shares	Sole	2025-08-14
2025-03-31	$3,572,837	192,502	-59.0%	Shares	Sole	2025-05-15
2025-03-31	$10,063,232	542,200	0.0%	Put	Sole	2025-05-15
2024-12-31	$9,878,884	542,200	+0.0%	Put	Sole	2025-02-14
2024-12-31	$8,545,507	469,018	-26.7%	Shares	Sole	2025-02-14
2024-09-30	$8,796,660	542,000	+0.1%	Put	Sole	2024-11-14
2024-09-30	$10,383,564	639,776	+44.4%	Shares	Sole	2024-11-14
2024-06-30	$9,073,475	541,700	+4.9%	Put	Sole	2024-08-14
2024-06-30	$7,421,288	443,062	-31.4%	Shares	Sole	2024-08-14
2024-03-31	$9,937,630	645,720	-9.5%	Shares	Sole	2024-05-15
2024-03-31	$7,947,396	516,400	—	Put	Sole	2024-05-15
2023-12-31	$8,659,862	713,333	+285.0%	Shares	Sole	2024-02-14
2023-09-30	$1,332,076	185,268	+29.5%	Shares	Sole	2023-11-14
2023-06-30	$1,247,622	143,076	-42.8%	Shares	Sole	2023-08-14
2023-03-31	$2,501,760	250,176	-59.4%	Shares	Sole	2023-05-15
2022-12-31	$5,039,395	616,063	-10.4%	Shares	Sole	2023-02-14
2022-09-30	$3,629,809	687,464	-0.5%	Shares	Sole	2022-11-14
2022-06-30	$5,093,841	691,159	-34.2%	Shares	Sole	2022-08-15
2022-03-31	$27,629,130	1,050,138	+292.6%	Shares	Sole	2022-05-16
2021-12-31	$4,430,064	267,516	-48.3%	Shares	Sole	2022-02-14
2021-09-30	$6,959,662	517,447	+1685.8%	Shares	Sole	2021-11-15
2021-06-30	$373,500	28,976	—	Shares	Sole	2021-08-16
No filing history on record for this holder in this stock.