X0306 4 2022-05-23 0001897982 Aspen Technology, Inc. AZPN 0001626333 Antkowiak Patrick M. C/O ASPEN TECHNOLOGY, INC. 20 C BEDFORD MA 01730 1 Common Stock 2022-05-23 4 A 0 670 0 A 670 D Each Restricted Stock Unit represents a contingent right to receive one share of Aspen Technology, Inc. common stock. Subject to rounding to whole shares, one-third of the Restricted Stock Units will vest on the first anniversary of the grant date and the remainder will vest in eight equal consecutive quarterly installments beginning on the last business day of the quarter of the first anniversary. The Restricted Stock Units were received as a grant for no consideration. /s/F.G. Hammond, attorney-in-fact for Mr. Antkowiak 2022-05-25