X0306 4 2022-06-02 0 0001145986 ASPEN AEROGELS INC ASPN 0001472399 Gervis Robert M. C/O ASPEN AEROGELS, INC. 30 FORBES ROAD, BUILDING B NORTHBOROUGH MA 01532 1 0 0 0 Common Stock 2022-06-02 4 A 0 2699 0.00 A 355182 D Common Stock 72491 I Held by Robert Gervis 2014 Grantor Retained Annuity Trust Stock Option (Right-to-Buy) 18.89 2022-06-02 4 A 0 3178 0.00 A 2032-06-02 Common Stock 3178 3178 D The reporting person was granted restricted shares of common stock representing a portion of the annual grant of equity for service as a non-employee director pursuant to the Issuer's Non-Employee Director Compensation Policy. These restricted shares will vest on the earlier of (a) June 2, 2023, or (b) the day prior to the Issuer's annual meeting of stockholders to be held in 2023. Represents shares held by the Robert Gervis 2014 Grantor Retained Annuity Trust, of which the reporting person is a beneficiary and his spouse is trustee. The reporting person was granted options representing the remaining portion of the annual grant of equity for service as a non-employee director pursuant to the Issuer's Non-Employee Director Compensation Policy. The options will vest on the earlier of (a) June 2, 2023, or (b) the day prior to the Issuer's annual meeting of stockholders to be held in 2023. /s/ Poongunran Muthukumaran, Attorney-in-Fact 2022-06-06