Constellium Se (CSTM) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

141,935,484Shares Outstanding

13,175,806Shares held by institutions

$308,445,618Value of institutional holdings

84.82%Institutional ownership %

-3.15%Shares Changed QoQ

235No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Constellium Se (NYSE:CSTM) currently has 235 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

The percentage of Constellium Se owned by institutions changed from 91.0% in September 2025 to 84.8% in December 2025, marking a slight down trend.
On a quarter-over-quarter basis, institutional holdings shifted by -3.15%, with a year-over-year an increase of 8.29% in the count of filers.
The latest 13F cycle for Constellium Se reveals that of 235 total investors, 114 funds grew their exposure, whereas 91 reduced theirs and 30 made no changes.
The total number of shares held by institutions in Constellium Se decreased to 120.39Mn as of December 2025, a net change of down by 3.91Mn shares quarter on quarter, and down 13.85Mn shares year over year.
The top institutional stake in Constellium Se as of December 31, 2025 belongs to BlackRock, Inc., which owns 13.73Mn shares, or 9.67% of the company.
Among the most significant buyers of Constellium Se during December 2025 were NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (1.94Mn), MORGAN STANLEY (1.22Mn), VANGUARD GROUP INC (755.92K), AMERICAN CENTURY COMPANIES INC (639.50K), D. E. Shaw & Co., Inc. (604.67K).
Leading sellers of Constellium Se stock in December 2025 included T. Rowe Price Investment Management, Inc. (3.46Mn), FMR LLC (2.95Mn), Nut Tree Capital Management, LP (1.99Mn), JANUS HENDERSON GROUP PLC (1.76Mn), COOPER CREEK PARTNERS MANAGEMENT LLC (667.31K).
The top 10 institutional holders of Constellium Se for the quarter ending December 2025 included BlackRock, Inc. (13.73Mn), Bpifrance SA (12.59Mn), FMR LLC (10.57Mn), MILLENNIUM MANAGEMENT LLC (6.27Mn), Encompass Capital Advisors LLC (4.66Mn), VANGUARD GROUP INC (4.05Mn), MORGAN STANLEY (3.73Mn), Nut Tree Capital Management, LP (3.23Mn), D. E. Shaw & Co., Inc. (3.06Mn), Nuveen, LLC (2.84Mn).

235 Institutional Holders

13,175,806 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	13,730,294	-288,909	-2.06%	$258,816,041.00
Bpifrance SA	31 Dec, 2025	12,593,903	0	0.00%	$237,395,072.00
FMR LLC	31 Dec, 2025	10,569,283	-2,948,788	-21.81%	$199,230,985.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	6,269,869	-665,897	-9.60%	$118,187,031.00
Encompass Capital Advisors LLC	31 Dec, 2025	4,657,915	393,640	9.23%	$87,801,698.00
VANGUARD GROUP INC	31 Dec, 2025	4,054,982	755,918	22.91%	$76,436,410.00
MORGAN STANLEY	31 Dec, 2025	3,728,118	1,216,516	48.44%	$70,275,043.00
Nut Tree Capital Management, LP	31 Dec, 2025	3,225,000	-1,988,900	-38.15%	$60,791,250.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	3,055,291	604,668	24.67%	$57,592,236.00
Nuveen, LLC	31 Dec, 2025	2,840,961	-9,160	-0.32%	$53,552,114.00
STATE STREET CORP	31 Dec, 2025	2,660,518	92,955	3.62%	$50,150,764.00
JPMORGAN CHASE & CO	31 Dec, 2025	2,089,412	-318,185	-13.22%	$39,385,416.00
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	31 Dec, 2025	1,944,239	1,944,239	0.00%	$36,649,000.00
BRIGHTLINE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,842,000	217,000	13.35%	$34,721,700.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	1,811,344	639,496	54.57%	$34,143,834.00
AQR CAPITAL MANAGEMENT LLC	31 Dec, 2025	1,766,503	488,580	38.23%	$33,298,578.00
SCOPUS ASSET MANAGEMENT, L.P.	31 Dec, 2025	1,731,708	425,000	32.52%	$32,642,696.00
T. Rowe Price Investment Management, Inc.	31 Dec, 2025	1,653,245	-3,463,435	-67.69%	$31,164.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,631,574	-76,562	-4.48%	$30,751,882.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	1,367,485	160,078	13.26%	$25,777,092.00

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