CONSTELLIUM SE (CSTM) is held by 157 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is BlackRock, Inc. as of Q1 2026.

Are institutions buying or selling CSTM?

In Q1 2026, 108 institutions opened or increased positions in CONSTELLIUM SE while 55 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on CSTM?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for CONSTELLIUM SE.

How many hedge funds hold CSTM?

157 institutional investors report holding CONSTELLIUM SE (CSTM) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into CSTM?

As of Q1 2026, tracked institutions in CONSTELLIUM SE show 108 buyers versus 55 sellers — net inflows.

CONSTELLIUM SE

CSTM·F21107101·US·Common Stock·Basic Materials - Aluminum-Activist

157

Holders

Avg rating(33 Elite)

$2.1B

Total Value

66% (168)

Fund Consensus

108 buying - 55 selling

Smart Money Verdict

View all

Held by 157 funds

33 elite

Who's Trading

InsiderOJOrmerod JohnSell $280KJun 4, 2026

InsiderBMBecker MarcusSell $363KMay 28, 2026

ActivistCDCaisse des Depots (CDC)6.2%May 28, 2026

InsiderJMJarrett MartinSell $158KMay 14, 2026

InsiderSLSoultz Bradley LeeBuy $85KMay 14, 2026

InsiderBNBrun NicolasSell $902KMay 11, 2026

InsiderCSCorre StephaneSell $168KMay 8, 2026

Activist

FMR LLC5.1%May 6, 2026

InsiderGQGuo Jack Q.Sell $822KMay 5, 2026

InsiderBMBrandjes MichielSell $325KMay 5, 2026

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Decreased	13M(-5.6%)	$318.7M	0.0%	+170.94%	0
FMR LLC	Decreased	7M(-34.1%)	$171.1M	0.0%	+193.68%	0
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	3.9M	$96.5M	0.0%	+13.36%	41
MILLENNIUM MANAGEMENT LLC	Decreased	3.5M(-44.6%)	$85.3M	0.0%	+113.22%	0
DED. E. Shaw & Co., Inc.	Increased	3.2M(+5.9%)	$79.5M	0.0%	+97.05%	32
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	Increased	3.2M(+620.9%)	$79.3M	0.0%	+22.30%	48
MORGAN STANLEY	Decreased	3.2M(-14.3%)	$78.6M	0.0%	+67.91%	0
Nuveen, LLC	Decreased	2.8M(-0.5%)	$69.5M	0.0%	+150.54%	0
STATE STREET CORP	Increased	2.8M(+3.9%)	$67.9M	0.0%	+52.92%	31
AMERICAN CENTURY COMPANIES INC	Increased	2.1M(+15.1%)	$51.3M	0.0%	+71.54%	34
AQR CAPITAL MANAGEMENT LLC	Increased	2.1M(+17.5%)	$51M	0.0%	+70.74%	34
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	Increased	2.1M(+894.5%)	$50.5M	0.1%	+17.94%	47
JPMORGAN CHASE & CO	Decreased	2.1M(-1.8%)	$47.3M	0.0%	+138.72%	0
NANOMURA ASSET MANAGEMENT INTERNATIONAL INC.	Decreased	1.9M(-1.6%)	$47M	0.1%	+54.35%	0
ALLIANCEBERNSTEIN L.P.	Increased	2.3M(+1573.5%)	$43.7M	0.0%	+15.40%	47
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.7M(+2.3%)	$41M	0.0%	+65.58%	30
WESTWOOD HOLDINGS GROUP INC	New	1.4M	$34.4M	0.3%	+13.36%	48
GOLDMAN SACHS GROUP INC	Increased	1.4M(+0.3%)	$33.7M	0.0%	+161.29%	29
Point72 Asset Management, L.P.	Increased	1M(+216.0%)	$24.7M	0.0%	+23.76%	46
NORTHERN TRUST CORP	Increased	977,583(+3.8%)	$24M	0.0%	+66.35%	30