Donald R Young

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
5 Mar 25	ASPN Aspen Aerogels	Common Stock	Grant	Acquire A	No	No	0	54,209	0.00	534,425
5 Mar 25	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	7.84	2,316	18.16 k	480,216
5 Mar 25	ASPN Aspen Aerogels	Performance Share Units Common Stock	Grant	Acquire A	No	No	0	108,418	0.00	108,418
5 Mar 25	ASPN Aspen Aerogels	Stock Options Common Stock	Grant	Acquire A	No	No	7.84	76,417	599.11 k	76,417
21 Feb 25	ASPN Aspen Aerogels	Common Stock	Payment of exercise	Dispose F	No	No	8.04	1,108	8.91 k	482,532
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

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