X0508 4/A 2024-09-03 2024-09-05 0001897982 Aspen Technology, Inc. AZPN 0002026536 Baker David John C/O ASPEN TECHNOLOGY, INC. 20 CROSBY DRIVE BEDFORD MA 01730 1 SVP, Chief Financial Officer 0 Common Stock 2024-09-03 4 A 0 3900 0 A 9978 D Common Stock 2024-09-03 4 A 0 2837 0 A 12815 D Common Stock 2024-09-10 4 F 0 832 234.14 D 11983 D Each Restricted Stock Unit represents a contingent right to receive one share of Aspen Technology, Inc. common stock. Subject to rounding, the Restricted Stock Units vest in 12 equal consecutive quarterly installments on the last business day of the quarter beginning with the quarter ending September 30, 2024. The Restricted Stock Units were received as a grant for no consideration. Each Restricted Stock Unit represents a contingent right to receive one share of Aspen Technology, Inc. common stock. The Restricted Stock Units were fully vested on the date of grant. Shares withheld by Registrant to satisfy minimum statutory tax withholding requirements on vesting of Restricted Stock Units and distribution of stock. The shares were withheld upon acceptance of the grant. /s/Christopher A. Cooper, attorney-in fact for Mr. Baker 2024-09-11