ASPN - Aspen Aerogels (ASPN) Q4 2021 Earnings Call Transcript February, 18 2022 01:30 AM Aspen Aerogels Inc. Image source: The Motley Fool. Aspen Aerogels (NYSE: ASPN) Q4 2021 Earnings Call Feb 17, 2022 , 5:00 p.m. ET Operator Continue reading For further details see: Aspen Aerogels (ASPN) Q4 2021 Earnings Call Transcript