Gregg Landes

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
6 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	No	25.65	25,463	653.13 k	29,853
6 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	No	25.11	22,923	575.60 k	55,316
8 Mar 24	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	17.02	1,771	30.14 k	78,239
5 Mar 24	ASPN Aspen Aerogels	Common Stock	Sale back to company	Dispose D	No	No	0	53,590	0.00	71,978
5 Mar 24	ASPN Aspen Aerogels	Common Stock	Grant	Acquire A	No	No	0	8,032	0.00	80,010
5 Mar 24	ASPN Aspen Aerogels	Stock Options Common Stock	Grant	Acquire A	No	No	16.34	35,249	575.97 k	35,249
24 Feb 24	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	16.96	330	5.60 k	125,568
23 Feb 24	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	16.96	495	8.40 k	125,898

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