Gregory R. Chemnitz

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
6 Dec 24	MTRN Materion	RSU Common Stock	Grant	Acquire A	No	No	0	6	0.00	4,553
7 Nov 24	MTRN Materion	Common Stock	Sell	Dispose S	No	No	117.866	1,500	176.80 k	12,031
7 Nov 24	MTRN Materion	Common Stock	Sell	Dispose S	No	No	116.67	500	58.34 k	13,531
4 Nov 24	MTRN Materion	Common Stock	Sell	Dispose S	No	No	105.098	2,000	210.20 k	14,031
6 Sep 24	MTRN Materion	RSU Common Stock	Grant	Acquire A	No	No	0	6	0.00	4,544
8 Aug 24	MTRN Materion	Common Stock	Sell	Dispose S	No	No	112.87	2,000	225.74 k	16,031

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.