X0206 3 2021-03-22 0 0000929940 ASPEN TECHNOLOGY INC /DE/ AZPN 0001850596 Breithaupt Chantelle Yvette C/O ASPEN TECHNOLOGY, INC. 20 CROSBY DRIVE BEDFORD MA 01730 1 SVP, Chief Financial Officer Common Stock 0 D /s/F.G. Hammond,attorney-in-fact for Ms. Breithaupt 2021-03-24