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CSTM in the 13F filings

Constellium Se · CUSIP F21107101

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
19 Feb 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
28
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 2 listed it in both
Shares listed
27,911,533
combined, among listed positions
Reported value
$526m
combined, at the quarter end

Among the 92 comparable managers: 14 buyers (opened or added shares) and 16 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -4,767,776.

Managers listing CSTM 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.

28 of 28 holders

ActionFiling
Fidelity (FMR LLC)10,569,283$199munder 0.1%Trimmed-2,948,78817 Feb 2026 (the filing on sec.gov)
Millennium Management LLC6,269,869$118munder 0.1%Trimmed-665,89717 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.3,055,291$58munder 0.1%Added+604,66817 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC1,766,503$33munder 0.1%Added+488,58017 Feb 2026 (the filing on sec.gov)
Moore Capital Management LP857,954$16m0.23%Added+215,21217 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC514,609$9.7munder 0.1%Trimmed-164,14917 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp496,715$9.4munder 0.1%Trimmed-254,34017 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP470,813$8.9munder 0.1%Added+113,26417 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP447,767$8.4munder 0.1%Trimmed-471,45513 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP401,989$7.6munder 0.1%Added+94,50213 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC361,626$6.8munder 0.1%Added+138,07110 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP318,089$6.0munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC313,732$5.9munder 0.1%Added+61,97412 Feb 2026 (the filing on sec.gov)
MFS Investment Management311,531$5.9munder 0.1%Added+26,55622 Jan 2026 (the filing on sec.gov)
Balyasny Asset Management LLC219,374$4.1munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC206,281$3.9munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC169,926$3.2munder 0.1%Trimmed-6,89517 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC165,125$3.1munder 0.1%Trimmed-61,21513 Feb 2026 (the filing on sec.gov)
Invesco Ltd164,654$3.1munder 0.1%Added+22,94219 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP152,197$2.9munder 0.1%Added+88,03717 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP138,450$2.6munder 0.1%Trimmed-19,30017 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC127,490$2.4munder 0.1%Trimmed-13,09717 Feb 2026 (the filing on sec.gov)
Man Group PLC116,669$2.2munder 0.1%Trimmed-270,70417 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc78,838$1.5munder 0.1%Trimmed-521,11517 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP59,500$1.1munder 0.1%Newnew17 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 (4)

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.
4 in Q3 2024 to 6 in Q2 2026

Tracked managers listing it, at least.

024682020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CSTM by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20195$135mn.a.n.a.
Q1 20205$55mn.a.n.a.
Q2 20204$82mn.a.n.a.
Q3 20204$102mn.a.n.a.
Q4 20204$409mn.a.n.a.
Q1 20216$472mn.a.n.a.
Q2 20214$623mn.a.n.a.
Q3 20215$582mn.a.n.a.
Q4 20214$594mn.a.n.a.
Q1 20226$587mn.a.n.a.
Q2 20227$408mn.a.n.a.
Q3 20225$150mn.a.n.a.
Q4 20224$178mn.a.n.a.
Q1 20234$226mn.a.n.a.
Q2 20234$256mn.a.n.a.
Q3 20235$254mn.a.n.a.
Q4 20232$209m21
Q1 20243$241m21
Q2 20244$167m31
Q3 20244$121m42
Q4 20245$98m51
Q1 20253$29m21
Q2 20253$48m30
Q3 20253$115m21
Q4 20253$142m1416
Q1 20266$215m1712
Q2 20266$215m1615

Compare with…

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

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

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 CSTM, latest filings →Back to the 13F Explorer →