X0206 3 2022-04-01 0 0001145986 ASPEN AEROGELS INC ASPN 0001920996 RODRIGUEZ RICARDO C. 30 FORBES ROAD BUILDING B NORTHBOROUGH MA 01532 0 1 0 0 SVP, CFO & Treasurer Common Stock 1653 D Common Stock 1136 D Common Stock 2615 D Common Stock 1482 D Stock Option (Right-to-Buy) 60.48 2031-11-15 Common Stock 6036 D Stock Option (Right-to-Buy) 26.29 2032-02-23 Common Stock 13693 D Stock Option (Right-to-Buy) 29.51 2032-02-25 Common Stock 7762 D Each Restricted Stock Unit ("RSU") represents the right to receive one share of Common Stock upon vesting. These RSUs vest November 15, 2022. These RSUs vest as to one-third of the RSUs on November 15, 2022, an additional one-third of the RSUs on November 15, 2023 and the remaining one-third of the RSUs on November 15, 2024. These RSUs vest as to one-third of the RSUs on February 23, 2023, an additional one-third of the RSUs on February 23, 2024 and the remaining one-third of the RSUs on February 23, 2025. These RSUs vest as to one-third of the RSUs on February 25, 2023, an additional one-third of the RSUs on February 25, 2024 and the remaining one-third of the RSUs on February 25, 2025. The options vest as to one-third of the shares on November 15, 2022, an additional one-third of the shares on November 15, 2023 and the remaining one-third of the shares on November 15, 2024. The options vest as to one-third of the shares on February 23, 2023, an additional one-third of the shares on February 23, 2024 and the remaining one-third shares on February 23, 2025. The options vest as to one-third of the shares on February 25, 2023, an additional one-third of the shares on February 25, 2024 and the remaining one-third shares on February 25, 2025. /s/ Poongunran Muthukumaran, Attorney-in-Fact 2022-04-01