Donald R Young

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
30 Sep 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	Yes	30.03	63,355	1.90 mm	483,640
29 Jun 24	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	23.85	75,885	1.81 mm	546,995
29 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	Yes	29.38	176,746	5.19 mm	622,880
29 May 24	ASPN Aspen Aerogels	Common Stock	Option exercise	Acquire M	No	Yes	6.4	296,771	1.90 mm	799,626
29 May 24	ASPN Aspen Aerogels	Stock Options Common Stock	Option exercise	Dispose M	No	Yes	6.4	296,771	1.90 mm	0
28 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	Yes	29.72	26,286	781.22 k	502,855
28 May 24	ASPN Aspen Aerogels	Common Stock	Sell	Dispose S	No	Yes	29.18	230,658	6.73 mm	529,141
28 May 24	ASPN Aspen Aerogels	Common Stock	Option exercise	Acquire M	No	Yes	6.4	26,577	170.09 k	759,799
28 May 24	ASPN Aspen Aerogels	Common Stock	Option exercise	Acquire M	No	Yes	7.54	108,105	815.11 k	733,222
28 May 24	ASPN Aspen Aerogels	Common Stock	Option exercise	Acquire M	No	Yes	10.78	259,671	2.80 mm	625,117

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