Matthew Charles Brown

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
14 Jan 25	ALTR Altair Engineering	Class A Common Stock	Grant	Acquire A	No	No	82.42	73	6.02 k	55,592
23 Dec 24	ALTR Altair Engineering	Class A Common Stock	Sell	Dispose S	No	No	108.9	1,048	114.13 k	55,519
12 Jul 24	ALTR Altair Engineering	Class A Common Stock	Grant	Acquire A	No	No	71.68	83	5.95 k	56,567
15 Mar 24	ALTR Altair Engineering	Class A Common Stock	Grant	Acquire A	No	No	0	8,625	0.00	56,484
15 Mar 24	ALTR Altair Engineering	Stock Option Class A Common Stock	Grant	Acquire A	No	No	79.03	21,563	1.70 mm	21,563
4 Mar 24	ALTR Altair Engineering	Class A Common Stock	Sell	Dispose S	No	No	85.32	883	75.34 k	47,859

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