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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 Mar 2026
the date the book describes
Filed
18 May 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
28
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 3 listed it in both
Shares listed
29,143,892
combined, among listed positions
Reported value
$703m
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: 17 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,291,859.

Managers listing CSTM 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.

28 of 28 holders

ActionFiling
Fidelity (FMR LLC)6,961,768$171munder 0.1%Trimmed-3,607,51515 May 2026 (the filing on sec.gov)
Millennium Management LLC3,470,091$85munder 0.1%Trimmed-2,799,77815 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.3,234,576$80munder 0.1%Added+179,28515 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP3,228,027$79munder 0.1%Added+2,780,26014 May 2026 (the filing on sec.gov)
AQR Capital Management LLC2,074,861$51munder 0.1%Added+308,35815 May 2026 (the filing on sec.gov)
AllianceBernstein LP2,317,008$44munder 0.1%Added+2,178,55815 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC1,272,871$31munder 0.1%Added+911,24513 May 2026 (the filing on sec.gov)
Point72 Asset Management LP1,005,203$25munder 0.1%Added+687,11415 May 2026 (the filing on sec.gov)
Jane Street Group LLC832,491$20munder 0.1%Added+518,75912 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC795,413$20munder 0.1%Added+576,03915 May 2026 (the filing on sec.gov)
Citadel Advisors LLC770,608$19munder 0.1%Added+643,11815 May 2026 (the filing on sec.gov)
Bridgewater Associates LP502,971$12m0.06%Newnew15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd439,301$11munder 0.1%Added+389,14718 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP401,989$9.9munder 0.1%Held013 May 2026 (the filing on sec.gov)
MFS Investment Management337,844$8.3munder 0.1%Added+26,31314 May 2026 (the filing on sec.gov)
Two Sigma Investments LP288,900$7.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC252,168$6.2munder 0.1%Trimmed-262,44115 May 2026 (the filing on sec.gov)
Invesco Ltd135,985$3.3munder 0.1%Trimmed-28,66912 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC130,320$3.2munder 0.1%Trimmed-39,60615 May 2026 (the filing on sec.gov)
Man Group PLC120,637$3.0munder 0.1%Added+3,96815 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP111,186$2.7munder 0.1%Added+52,82715 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC109,706$2.7munder 0.1%Trimmed-96,57515 May 2026 (the filing on sec.gov)
Moore Capital Management LP101,898$2.5m0.05%Trimmed-756,05615 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc98,901$2.4munder 0.1%Added+20,06315 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP85,828$2.1munder 0.1%Trimmed-66,36914 May 2026 (the filing on sec.gov)
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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 (3)

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 →