MATERION CORP

Ticker: MTRN CUSIP: 576690101 Class: EQTY

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

Note: Option positions (PUT/CALL) are excluded.

Q4 2022

Shares 390,660 Value ($000) $34,187 Avg Close $81.64 Range $64.89 - $89.26

Q3 2022

Shares 501,343 Value ($000) $40,107 Avg Close $82.42 Range $69.36 - $97.89

Q2 2022

Shares 516,931 Value ($000) $38,113 Avg Close $80.32 Range $68.75 - $89.68

Q1 2022

Shares 531,894 Value ($000) $45,605 Avg Close $85.47 Range $78.88 - $96.00

Q4 2021

Shares 539,369 Value ($000) $49,590 Avg Close $83.35 Range $68.09 - $95.60

Q3 2021

Shares 586,456 Value ($000) $40,254 Avg Close $71.56 Range $66.92 - $76.97

Q2 2021

Shares 1,185 Value ($000) $89 Avg Close $74.12 Range $64.48 - $80.39

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2022	390,660	$34,187	$81.64	$64.89 - $89.26
Q3 2022	501,343	$40,107	$82.42	$69.36 - $97.89
Q2 2022	516,931	$38,113	$80.32	$68.75 - $89.68
Q1 2022	531,894	$45,605	$85.47	$78.88 - $96.00
Q4 2021	539,369	$49,590	$83.35	$68.09 - $95.60
Q3 2021	586,456	$40,254	$71.56	$66.92 - $76.97
Q2 2021	1,185	$89	$74.12	$64.48 - $80.39