Company · Ownership research

CONSTELLIUM SE CSTM

CIK 0001563411 · CUSIP F21107101

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP F21107101 (CSTM), not CUSIP F21107901 (CSTM), CUSIP F21107951 (CSTM), CUSIP N22035104 (CSTM), and does not merge CUSIPs.

This page lists the top 20 of 125 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$40.75M 1,684,778 shares	0.00%	-104.94K(-5.90%)Reduced	SEC filing ↗ Nov 6, 2026	▾
02	Penn Capital Management Company, LLC CIK 1158202 · View history	$18.97M 782,628 shares	1.38%	+32.98K(+4.40%)Added	SEC filing ↗ Nov 4, 2026	▾
03	MACKENZIE FINANCIAL CORP CIK 919859 · View history	$18.15M 750,285 shares	0.02%	+157.75K(+26.60%)Added	SEC filing ↗ Nov 2, 2026	▾
04	Fisher Asset Management, LLC CIK 850529 · View history	$13.39M 553,425 shares	0.00%	+1.01K(+0.20%)Added	SEC filing ↗ Nov 6, 2026	▾
05	Bank of New York Mellon Corp CIK 1390777 · View history	$10.09M 417,191 shares	0.00%	-18.58K(-4.30%)Reduced	SEC filing ↗ Nov 5, 2026	▾
06	Russell Investments Group, Ltd. CIK 1692234 · View history	$9.67M 399,787 shares	0.01%	-75.73K(-15.90%)Reduced	SEC filing ↗ Nov 6, 2026	▾
07	CITIGROUP INC CIK 831001 · View history	$9.62M 397,829 shares	0.00%	+284.47K(+250.90%)Added	SEC filing ↗ Nov 4, 2026	▾
08	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$7.98M 330,022 shares	0.00%	+319.66K(+3,084.90%)Added	SEC filing ↗ Nov 2, 2026	▾
09	LSV ASSET MANAGEMENT CIK 1050470 · View history	$7.75M 320,300 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Nov 6, 2026	▾
10	Creative Planning CIK 1540235 · View history	$7.10M 293,342 shares	0.00%	+1.65K(+0.60%)Added	SEC filing ↗ Nov 2, 2026	▾
11	HENNESSY ADVISORS INC CIK 1145255 · View history	$6.49M 268,300 shares	0.24%	-26.20K(-8.90%)Reduced	SEC filing ↗ Oct 28, 2026	▾
12	Y-Intercept (Hong Kong) Ltd CIK 1772875 · View history	$6.09M 251,937 shares	0.13%	+211.25K(+519.20%)Added	SEC filing ↗ Oct 16, 2026	▾
13	BARCLAYS PLC CIK 312069 · View history	$4.90M 202,591 shares	0.00%	+47.45K(+30.60%)Added	SEC filing ↗ Nov 6, 2026	▾
14	State of Alaska, Department of Revenue CIK 1370102 · View history	$4.80M 198,487 shares	0.05%	+72.00K(+56.90%)Added	SEC filing ↗ Oct 15, 2026	▾
15	KBC Group NV CIK 1411133 · View history	$4.80M 198,356 shares	0.01%	+566(+0.30%)Added	SEC filing ↗ Oct 22, 2026	▾
16	LPL Financial LLC CIK 1403438 · View history	$4.19M 173,348 shares	0.00%	-94.93K(-35.40%)Reduced	SEC filing ↗ Nov 6, 2026	▾
17	Rockingstone Advisors LLC CIK 2027176 · View history	$4.13M 170,710 shares	1.66%	-1.10K(-0.60%)Reduced	SEC filing ↗ Oct 16, 2026	▾
18	Convergence Investment Partners, LLC CIK 1456133 · View history	$3.73M 154,324 shares	0.28%	+55.69K(+56.50%)Added	SEC filing ↗ Oct 28, 2026	▾
19	DEUTSCHE BANK AG\ CIK 948046 · View history	$3.32M 137,436 shares	0.00%	-37.62K(-21.50%)Reduced	SEC filing ↗ Nov 6, 2026	▾
20	DekaBank Deutsche Girozentrale CIK 1456228 · View history	$3.18M 130,978 shares	0.00%	+130.98KNew	SEC filing ↗ Oct 27, 2026	▾

Showing 20 / 125 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

125

Cancelled or null records excluded

Disclosed shares

9,625,010

Not deduplicated across managers

Disclosed value

$232.88M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

CONSTELLIUM SE · Q3 2026

Explore all 125 reporting institutions.

This page includes 20 of 125 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.