X0306 4 2021-09-01 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 2021-09-01 4 A 0 11795 0 A 23978 D Common Stock Option (Right to Buy) 129.95 2021-09-01 4 A 0 21901 129.50 A 2031-08-31 Common Stock 21901 21901 D Each Restricted Stock Unit represents a contingent right to receive one share of Aspen Technology, Inc. common stock. The Restricted Stock Units vest in 16 equal consecutive quarterly installments on the last business day of the quarter beginning with the quarter ending September 30, 2021. The Restricted Stock Units were received as a grant for no consideration. The option granted at the exercise price of $129.50 vests in 16 equal consecutive quarterly installments on the last business day of the quarter, beginning with the quarter ending September 30, 2021. /s/F.G. Hammond, attorney-in-fact for Ms. Breithaupt 2021-09-03