Who owns CSTMWhat CSTM owns — n/a

Who owns CONSTELLIUM SE?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of CSTM from SEC Form 13F filings across 384 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 384 institutions disclosed 148.7M shares of CONSTELLIUM SE worth $3.07B; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.

384

13F holders

$3.07B

value, 2026 filers

148.7M

shares disclosed

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of CSTM's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BlackRock, Inc.	13.0M	$318.7M	0.0%	—	—
2	Bpifrance SA	8.4M	$267.8M	19.7%	—	—
3	BlackRock Inc.	11.4M	$215.4M	0.0%	—	—
4	FMR LLC	7.0M	$171.1M	0.0%	—	—
5	T. Rowe Price Investment Management, Inc.	4.0M	$97.4M	0.1%	—	—
6	MILLENNIUM MANAGEMENT LLC	3.5M	$85.3M	0.0%	—	—
7	D. E. Shaw & Co., Inc.	3.2M	$79.5M	0.0%	—	—
8	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	3.2M	$79.3M	0.0%	—	—
9	MORGAN STANLEY	3.2M	$78.6M	0.0%	—	—
10	VANGUARD GROUP INC	4.1M	$76.4M	0.0%	—	—
11	Nuveen, LLC	2.8M	$69.5M	0.0%	—	—
12	STATE STREET CORP	2.8M	$67.9M	0.0%	—	—
13	Marshall Wace North America L.P.	3.3M	$61.8M	0.3%	—	—
14	Encompass Capital Advisors LLC	2.5M	$60.9M	1.8%	—	—
15	AMERICAN CENTURY COMPANIES INC	2.1M	$51.3M	0.0%	—	—
16	Cannell & Co.	2.6M	$51.1M	1.6%	—	—
17	AQR CAPITAL MANAGEMENT LLC	2.1M	$51.0M	0.0%	—	—
18	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	2.1M	$50.5M	0.1%	—	—
19	QUADRANT CAPITAL GROUP LLC	3,677	$49.0M	0.0%	—	—
20	JPMORGAN CHASE & CO	2.1M	$47.3M	0.0%	—	—
21	MACQUARIE MANAGEMENT HOLDINGS, INC.	1.9M	$47.0M	0.1%	—	—
22	BRIGHTLINE CAPITAL MANAGEMENT, LLC	1.8M	$45.4M	13.4%	—	—
23	ALLIANCEBERNSTEIN L.P.	2.3M	$43.7M	0.0%	—	—
24	GEODE CAPITAL MANAGEMENT, LLC	1.7M	$41.0M	0.0%	—	—
25	SG Americas Securities, LLC	1.5M	$36.8M	0.0%	—	—

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.