Keith L Schilling

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
7 Mar 25	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	7.95	1,924	15.30 k	49,797
5 Mar 25	ASPN Aspen Aerogels	Common Stock	Grant	Acquire A	No	No	0	24,713	0.00	51,721
5 Mar 25	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	7.84	936	7.34 k	27,008
5 Mar 25	ASPN Aspen Aerogels	Performance Share Units Common Stock	Grant	Acquire A	No	No	0	49,426	0.00	49,426
5 Mar 25	ASPN Aspen Aerogels	Stock Options Common Stock	Grant	Acquire A	No	No	7.84	34,837	273.12 k	34,837
21 Feb 25	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	8.04	499	4.01 k	27,944
1 Nov 24	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	18.05	349	6.30 k	28,443
13 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	No	27.42	500	13.71 k	28,792
13 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	No	26.83	19,500	523.18 k	29,292
13 May 24	ASPN Aspen Aerogels	Common Stock	Option exercise	Acquire M	No	No	6.81	20,000	136.20 k	48,792

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