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Equibles

JANE STREET GROUP, LLC

Position in CENX — Century Aluminum Co

CIK 1595888 NEW YORK, NY
Back to CENX Full portfolio

Position in CENX

as of Mar 31, 2026 · filed May 12, 2026
Position Value
$77,526,085
+$75,899,411 QoQ
Shares Held
1,320,942
+3081.6% QoQ
Ownership
1.33%
of shares outstanding
% of Portfolio
0.10%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
22 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 Mar 31, 2026
CallValue
$6,385,472
CallShares
108,800
PutValue
$8,815,238
PutShares
150,200

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 Mar 31, 2026

JANE STREET GROUP, LLC holds $105,348,443 across 4 Aluminum names. CENX ranks #1 (73.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 CENX
Century Aluminum Co
This page 		1,320,942 $77,526,085
2 CSTM
Constellium SE
 832,491 $20,462,627
3 KALU
Kaiser Aluminum Corp
 50,671 $6,106,361
4 AA
Alcoa Corp
 18,896 $1,253,370

All Filings in CENX

Export CSV
44 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $8,815,238 150,200
2026-03-31 $6,385,472 108,800
2026-03-31 $77,526,085 1,320,942
2025-12-31 $4,568,388 116,600
2025-12-31 $1,626,674 41,518
2025-12-31 $5,402,922 137,900
2025-09-30 $4,656,496 158,600
2025-09-30 $3,311,808 112,800
2025-09-30 $4,880,981 166,246
2025-06-30 $2,616,504 145,200
2025-06-30 $2,211,054 122,700
2025-06-30 $2,785,999 154,606
2025-03-31 $3,155,200 170,000
2025-03-31 $3,622,892 195,199
2025-03-31 $4,380,160 236,000
2024-12-31 $1,543,252 84,701
2024-12-31 $3,687,728 202,400
2024-12-31 $2,038,818 111,900
2024-09-30 $345,699 21,300
2024-09-30 $2,316,021 142,700
2024-09-30 $2,255,580 138,976
2024-06-30 $4,846,143 289,322
2024-03-31 $1,171,394 76,114
2023-12-31 $4,080,119 336,089
2023-09-30 $482,189 67,064
2023-06-30 $468,298 53,704
2023-03-31 $745,430 74,543
2022-12-31 $858,800 104,988
2022-09-30 $488,774 92,571
2022-06-30 $3,132,463 425,029
2022-03-31 $5,356,716 203,600
2022-03-31 $5,348,823 203,300
2022-03-31 $2,192,780 83,344
2021-12-31 $3,583,584 216,400
2021-12-31 $577,944 34,900
2021-12-31 $567,279 34,256
2021-09-30 $465,907 34,640
2021-09-30 $455,955 33,900
2021-09-30 $162,745 12,100
2021-06-30 $581,339 45,100
2021-06-30 $1,575,054 122,192
2021-06-30 $800,469 62,100
2021-03-31 $562,135 31,831
2020-03-31 $43,693 12,070

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