HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND

Pension

Position in CSTM — Constellium SE

CIK 1535845 TORONTO, A6

Position in CSTM

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$72,606,297

+$22,061,559 QoQ

Shares Held

2,278,202

+10.8% QoQ

Ownership

1.67%

of shares outstanding

% of Portfolio

0.12%

of 13F equity value

Holder Rank

#13

of 385 holders

Holding Since

Jun 2021

19 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Basic Materials · as of Jun 30, 2026

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND holds $99,033,008 across 3 Aluminum names. CSTM ranks #1 (73.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CSTM	Constellium SE This page	2,278,202	$72,606,297
2	CENX	Century Aluminum Co	326,500	$15,022,265
3	KALU	Kaiser Aluminum Corp	58,296	$11,404,446

19 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$72,606,297	2,278,202	+10.8%	Shares	Sole	2026-08-13
2026-03-31	$50,544,738	2,056,336	+894.4%	Shares	Sole	2026-05-14
2025-12-31	$3,897,840	206,782	+25.9%	Shares	Sole	2026-02-13
2025-09-30	$2,444,784	164,300	+2380.0%	Shares	Sole	2025-11-13
2025-03-31	$66,846	6,625	-97.8%	Shares	Sole	2025-05-14
2024-12-31	$3,045,311	296,525	-38.9%	Shares	Sole	2025-02-14
2024-09-30	$7,886,506	485,025	-14.6%	Shares	Sole	2024-11-13
2024-06-30	$10,707,271	568,025	0.0%	Shares	Sole	2024-09-20
2024-03-31	$12,559,032	568,025	+17.1%	Shares	Sole	2024-05-13
2023-12-31	$9,681,099	485,025	-10.1%	Shares	Sole	2024-03-21
2023-09-30	$9,818,900	539,500	-8.9%	Shares	Sole	2023-11-13
2023-06-30	$10,188,316	592,344	+24.1%	Shares	Sole	2023-08-11
2023-03-31	$7,293,144	477,300	-42.9%	Shares	Sole	2023-05-12
2022-12-31	$9,883,965	835,500	-4.6%	Shares	Sole	2023-02-13
2022-09-30	$8,879,598	875,700	-0.1%	Shares	Sole	2022-11-14
2022-06-30	$11,585,170	877,000	+437.7%	Shares	Sole	2022-08-11
2022-03-31	$2,935,800	163,100	-73.6%	Shares	Sole	2022-05-12
2021-09-30	$11,592,894	617,300	-29.1%	Shares	Sole	2021-11-10
2021-06-30	$16,503,555	870,900	—	Shares	Sole	2021-08-12
No filing history on record for this holder in this stock.