MARTINGALE ASSET MANAGEMENT L P

Position in MTRN — MATERION Corp

CIK 936944 BOSTON, MA

Position in MTRN

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$4,457,823

+$1,242,535 QoQ

Shares Held

30,818

+19.2% QoQ

Ownership

0.148%

of shares outstanding

% of Portfolio

0.11%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

6 quarters on record

Voting authority Sole 51% Shared 0% None 49%

Basic Materials · as of Mar 31, 2026

MARTINGALE ASSET MANAGEMENT L P holds $6,398,092 across 3 Other Industrial Metals & Mining names. MTRN ranks #1 (69.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MTRN	MATERION Corp This page	30,818	$4,457,823
2	CMP	Compass Minerals International Inc	48,140	$1,124,069
3	GSM	Ferroglobe PLC	198,107	$816,200

6 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$4,457,823	30,818	+19.2%	Shares	Sole	2026-05-13
2025-12-31	$3,215,288	25,863	+24.9%	Shares	Sole	2026-02-13
2025-09-30	$2,501,975	20,710	-35.1%	Shares	Sole	2025-11-13
2020-09-30	$1,660,069	31,906	-62.2%	Shares	Sole	2020-11-12
2020-06-30	$5,184,098	84,308	+0.0%	Shares	Sole	2020-08-10
2020-03-31	$2,951,553	84,306	—	Shares	Sole	2020-05-11
No filing history on record for this holder in this stock.