HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND

Pension

Position in MTRN — MATERION Corp

CIK 1535845 TORONTO, A6

Back to MTRN Full portfolio

Position in MTRN

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

Position Value

$34,437,762

+$32,312,275 QoQ

Shares Held

115,800

+688.1% QoQ

Ownership

0.556%

of shares outstanding

% of Portfolio

0.06%

of 13F equity value

Holder Rank

#37

of 405 holders

Holding Since

Mar 2020

6 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in MTRN Over Time

Shares Held

Position Value (USD)

Position in Other Industrial Metals & Mining

Basic Materials · as of Jun 30, 2026

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND holds $34,437,762 across 1 Other Industrial Metals & Mining name. MTRN ranks #1 (100.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	MTRN	MATERION Corp This page	115,800	$34,437,762

All Filings in MTRN

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6 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$34,437,762	115,800	+688.1%	Shares	Sole	2026-08-13
2026-03-31	$2,125,487	14,694	-39.8%	Shares	Sole	2026-05-14
2025-12-31	$3,032,662	24,394	+32.6%	Shares	Sole	2026-02-13
2020-12-31	$1,172,448	18,400	-52.3%	Shares	Sole	2021-03-01
2020-09-30	$2,008,358	38,600	-59.8%	Shares	Sole	2021-03-01
2020-03-31	$3,364,461	96,100	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.