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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 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
34
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 7 listed it in both
Shares listed
15,644,619
combined, among listed positions
Reported value
$915m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 23 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +7,989,883.

Managers listing CENX in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

34 of 34 holders

ActionFiling
Fidelity (FMR LLC)2,660,054$156munder 0.1%Added+2,651,34815 May 2026 (the filing on sec.gov)
Invesco Ltd2,076,528$122munder 0.1%Added+1,447,11612 May 2026 (the filing on sec.gov)
Millennium Management LLC1,987,625$117munder 0.1%Added+569,59315 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,433,369$84m0.05%Added+242,43215 May 2026 (the filing on sec.gov)
Jane Street Group LLC1,320,942$78munder 0.1%Added+1,279,42412 May 2026 (the filing on sec.gov)
Citadel Advisors LLC1,320,867$78munder 0.1%Added+623,65015 May 2026 (the filing on sec.gov)
Bridgewater Associates LP732,517$43m0.19%Added+460,71915 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC720,735$42m0.17%Trimmed-219,59015 May 2026 (the filing on sec.gov)
Point72 Asset Management LP569,451$33munder 0.1%Added+397,04315 May 2026 (the filing on sec.gov)
Rokos Capital Management LLP436,688$26m0.19%Newnew15 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC410,093$24munder 0.1%Added+372,87415 May 2026 (the filing on sec.gov)
Wellington Management Group LLP378,447$22munder 0.1%Added+180,60415 May 2026 (the filing on sec.gov)
Tudor Investment Corp279,161$16munder 0.1%Trimmed-86,69615 May 2026 (the filing on sec.gov)
AQR Capital Management LLC166,233$9.8munder 0.1%Added+100,92815 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC163,087$9.6munder 0.1%Trimmed-138,52514 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC139,499$8.2munder 0.1%Added+21,50014 May 2026 (the filing on sec.gov)
AllianceBernstein LP159,508$6.3munder 0.1%Added+84,19015 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC95,068$5.6munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Caxton Associates LLP88,690$5.2m0.12%Trimmed-12,75914 May 2026 (the filing on sec.gov)
Moore Capital Management LP82,752$4.9m0.10%Newnew15 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP78,472$4.6munder 0.1%Trimmed-132,01115 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC73,151$4.3munder 0.1%Added+60,34527 Oct 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc62,500$3.7munder 0.1%Added+10,77515 May 2026 (the filing on sec.gov)
Walleye Capital LLC38,959$2.3munder 0.1%Trimmed-69,79213 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP30,169$1.8munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, 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 (7)

Exited (2)

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 →