13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded

Constellium SE

316 institutions still hold Constellium SE as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP f21107101·316 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 4.7%
vs prior quarter
13F value held
$1.8B
77.0% inst. owned
of float
Holders
316
-68 QoQ
filers reporting
Activity
+43 / −38
+750 added · −799 reduced
this quarter
Concentration
17.38%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

316 institutions reported Constellium SE in Q1 2026. BlackRock, Inc. leads at 17.4% of the visible book. -68 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$319M13.0M0.01%Q1 202602
Bpifrance SA
CIK 0001731118
$310M12.6M18.71%Q1 202603
FMR LLC
CIK 0000315066
$171M7.0M0.01%Q1 202604
Vanguard Portfolio Management
CIK 0002100121
$97M3.9M0.01%Q1 202605
Encompass Capital Advisors LLC
CIK 0001541901
$88M4.7M3.58%Q4 202506
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$85M3.5M0.04%Q1 202607
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$79M3.2M0.04%Q1 202608
MORGAN STANLEY
CIK 0000895421
$79M3.2M0.00%Q1 202609
Nuveen, LLC
CIK 0001871926
$70M2.8M0.02%Q1 202610
STATE STREET CORP
CIK 0000093751
$68M2.8M0.00%Q1 202611
D. E. Shaw & Co., Inc.
CIK 0001009207
$58M3.1M0.03%Q4 202512
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$51M2.1M0.03%Q1 202613
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$51M2.1M0.02%Q1 202614
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
CIK 0001535845
$51M2.1M0.08%Q1 202615
JPMORGAN CHASE & CO
CIK 0000019617
$47M2.1M0.00%Q1 202616
Delaware Management Holdings, Inc.
CIK 0000921739
$47M1.9M0.08%Q1 202617
BRIGHTLINE CAPITAL MANAGEMENT, LLC
CIK 0001432450
$45M1.8M13.43%Q1 202618
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$44M2.3M0.01%Q1 202619
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$41M1.7M0.00%Q1 202620
WESTWOOD HOLDINGS GROUP INC
CIK 0001165002
$34M1.4M0.25%Q1 2026
Page 1 of 16
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