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CENX in the 13F filings

Century Alum Co · CUSIP 156431108

Sector · Materials
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 4 Feb 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 4 listed it in both
Shares listed
7,654,736
combined, among listed positions
Reported value
$300m
combined, at the quarter end

Among the 92 comparable managers: 16 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,757,258.

Managers listing CENX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Millennium Management LLC1,418,032$56munder 0.1%Added+975,35917 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,190,937$47munder 0.1%Added+989,34317 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC940,325$37m0.13%Added+143,44217 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC697,217$27munder 0.1%Trimmed-808,47917 Feb 2026 (the filing on sec.gov)
Invesco Ltd629,412$25munder 0.1%Trimmed-220,11019 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp365,857$14munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
First Eagle Investment Management LLC301,612$12munder 0.1%Trimmed-38,5414 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP271,798$11munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP210,483$8.2munder 0.1%Trimmed-7,66817 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP197,843$7.8munder 0.1%Added+3,74917 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP172,408$6.8munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP155,087$6.1munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC127,957$5.0munder 0.1%Added+83,60917 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC117,999$4.6munder 0.1%Trimmed-247,10012 Feb 2026 (the filing on sec.gov)
Woodline Partners LP115,294$4.5munder 0.1%Trimmed-104,97017 Feb 2026 (the filing on sec.gov)
Quantbot Technologies LP112,966$4.4m0.15%Added+79,13710 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC108,751$4.3munder 0.1%Added+108,69013 Feb 2026 (the filing on sec.gov)
Caxton Associates LLP101,449$4.0m0.08%Added+39,09213 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP75,318$3.0munder 0.1%Added+9,07517 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC65,305$2.6munder 0.1%Trimmed-76817 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC54,280$2.1munder 0.1%Trimmed-29,03813 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc51,725$2.0munder 0.1%Added+2,21717 Feb 2026 (the filing on sec.gov)
Winton Group Ltd42,614$1.7m0.06%Trimmed-6,29811 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC41,518$1.6munder 0.1%Trimmed-124,72812 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC37,219$1.5munder 0.1%Trimmed-7,07313 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 7 in Q2 2026

Tracked managers listing it, at least.

02468201420162018202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CENX by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20132$24mn.a.n.a.
Q3 20131$23mn.a.n.a.
Q4 20131$29mn.a.n.a.
Q1 20142$37mn.a.n.a.
Q2 20142$45mn.a.n.a.
Q3 20146$53mn.a.n.a.
Q4 20144$10mn.a.n.a.
Q1 20152$2.1mn.a.n.a.
Q2 20152$7.8mn.a.n.a.
Q3 20151$6.5mn.a.n.a.
Q4 20151$9.2mn.a.n.a.
Q1 20162$5.9mn.a.n.a.
Q4 20161$1.4mn.a.n.a.
Q1 20171$4.9mn.a.n.a.
Q2 20174$52mn.a.n.a.
Q3 20173$107mn.a.n.a.
Q4 20174$181mn.a.n.a.
Q1 20183$130mn.a.n.a.
Q2 20183$67mn.a.n.a.
Q3 20182$28mn.a.n.a.
Q4 20181$5.6mn.a.n.a.
Q1 20192$6.9mn.a.n.a.
Q2 20201$208kn.a.n.a.
Q4 20201$1.2mn.a.n.a.
Q1 20212$3.1mn.a.n.a.
Q2 20212$7.2mn.a.n.a.
Q3 20212$3.5mn.a.n.a.
Q4 20212$3.5mn.a.n.a.
Q1 20224$56mn.a.n.a.
Q2 20221$1.1mn.a.n.a.
Q3 20222$2.4mn.a.n.a.
Q4 20222$4.8mn.a.n.a.
Q1 20232$5.1mn.a.n.a.
Q2 20232$4.6mn.a.n.a.
Q3 20233$6.7mn.a.n.a.
Q4 20233$25m30
Q1 20245$33m41
Q2 20243$30m03
Q3 20245$32m32
Q4 20246$44m33
Q1 20256$32m34
Q2 20253$31m12
Q3 20254$37m31
Q4 20257$75m1613
Q1 20268$331m2312
Q2 20267$137m1820

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

CENX and LIN →CENX and GLW →CENX and HWM →Choose a stock to compare with CENX →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own CENX, latest filings →Back to the 13F Explorer →