Dias Nelson

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
3 Mar 25	ALTR Altair Engineering	Class A Common Stock	Sell	Dispose S	No	No	111.45	491	54.72 k	57,082
26 Feb 25	ALTR Altair Engineering	Class A Common Stock	Sell	Dispose S	No	No	111.53	373	41.60 k	57,573
12 Feb 25	ALTR Altair Engineering	Class A Common Stock	Grant	Acquire A	No	No	0	9,509	0.00	57,946
10 Dec 24	ALTR Altair Engineering	Class A Common Stock	Sell	Dispose S	No	No	106.2258	22,500	2.39 mm	48,437
10 Dec 24	ALTR Altair Engineering	Class A Common Stock	Option exercise	Acquire M	No	No	0	22,500	0.00	70,937
10 Dec 24	ALTR Altair Engineering	Stock Option Class A Common Stock	Option exercise	Dispose M	No	No	39.82	22,500	895.95 k	0
8 May 24	ALTR Altair Engineering	Class A Common Stock	Sell	Dispose S	No	No	84.3792	285	24.05 k	48,437

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