Boston Partners

Position in CSTM — Constellium SE

CIK 1386060 BOSTON, MA

Position in CSTM

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$1,498,962

-$8,717,813 QoQ

Shares Held

60,983

-88.7% QoQ

Ownership

0.045%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2020

21 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Basic Materials · as of Mar 31, 2026

Boston Partners holds $27,700,084 across 3 Aluminum names. CSTM ranks #3 (5.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CENX	Century Aluminum Co	309,896	$18,187,796
2	AA	Alcoa Corp	120,810	$8,013,326
3	CSTM	Constellium SE This page	60,983	$1,498,962

21 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,498,962	60,983	-88.7%	Shares	Defined	2026-05-11
2025-12-31	$10,216,775	542,004	-13.3%	Shares	Defined	2026-02-13
2025-09-30	$9,301,636	625,110	+119.5%	Shares	Defined	2025-11-13
2025-06-30	$3,787,214	284,753	+110.2%	Shares	Defined	2025-08-12
2025-03-31	$1,366,549	135,436	+3.2%	Shares	Defined	2025-05-13
2024-12-31	$1,348,163	131,272	+27.2%	Shares	Defined	2025-02-11
2024-09-30	$1,677,625	103,175	+11.1%	Shares	Defined	2024-11-12
2024-06-30	$1,751,165	92,900	+63.1%	Shares	Defined	2024-08-14
2024-03-31	$1,259,164	56,950	+67.9%	Shares	Defined	2024-05-28
2023-12-31	$676,983	33,917	-33.0%	Shares	Defined	2024-02-07
2023-09-30	$921,375	50,625	-10.2%	Shares	Defined	2023-11-08
2023-06-30	$969,426	56,362	+38.1%	Shares	Defined	2023-08-10
2023-03-31	$623,683	40,817	-13.2%	Shares	Defined	2023-05-09
2022-12-31	$556,530	47,044	+44.1%	Shares	Defined	2023-02-08
2022-06-30	$431,359	32,654	+11.5%	Shares	Defined	2022-08-10
2022-03-31	$527,184	29,288	-4.5%	Shares	Defined	2022-05-10
2021-12-31	$549,460	30,679	-17.9%	Shares	Defined	2022-02-04
2021-09-30	$701,752	37,367	-39.6%	Shares	Defined	2021-11-05
2021-06-30	$1,172,738	61,886	-59.8%	Shares	Other	2021-08-12
2021-03-31	$2,265,563	154,120	+195.6%	Shares	Defined	2021-05-10
2020-12-31	$729,381	52,136	—	Shares	Defined	2021-02-10
No filing history on record for this holder in this stock.