X0306 4 2022-05-23 0001897982 Aspen Technology, Inc. AZPN 0001332920 Hammond F G C/O ASPEN TECHNOLOGY, INC. 20 CROSBY DRIVE BEDFORD MA 01730 1 Senior VP & General Counsel Common Stock 2022-05-23 4 A 0 14936 A 20057 D Common Stock 2022-05-23 4 F 0 260 186.03 D 19797 D Employee Stock Option (Right to Buy) 129.48 2022-05-23 4 A 0 6435 A 2028-09-03 Common Stock 6435 6435 D Employee Stock Option (Right to Buy) 149.50 2022-05-23 4 A 0 6431 A 2029-09-02 Common Stock 6431 6431 D Employee Stock Option (Right to Buy) 146.48 2022-05-23 4 A 0 7876 A 2030-12-27 Common Stock 7876 7876 D Common Stock Option (Right to Buy) 145.35 2022-05-23 4 A 0 8006 A 2031-08-31 Common Stock 8006 8006 D Represents equity awards granted by Aspen Technology, Inc. (which subsequently changed its name to "AspenTech Corporation", "Former AspenTech") that have been converted into equity awards of Emersub CX, Inc. (which subsequently changed its name to "Aspen Technology Inc.", the "Issuer") pursuant to the terms of the Transaction Agreement and Plan of Merger, dated as of October 10, 2021, as amended, among Former AspenTech, the Issuer and certain other parties thereto (the "Transaction Agreement"), pursuant to which Former AspenTech merged with a wholly owned subsidiary of the Issuer and became a wholly owned subsidiary of the Issuer (the "Transaction"). The Transaction closed on May 16, 2022. Pursuant to the terms of the Transaction Agreement, the number of equity awards reported herein were determined on May 23, 2022, based on the five-day volume weighted average price of the Issuer's common stock following the closing of the Transaction. Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock. Shares withheld by Registrant to satisfy statutory tax withholding requirements on vesting of Restricted Stock Units and distribution of stock. The option granted at the exercise price of $129.48 vests in 16 equal consecutive quarterly installments on the last business day of the quarter, beginning with the quarter ending September 30, 2018. The option granted at the exercise price of $149.50 vests in 16 equal consecutive quarterly installments on the last business day of the quarter, beginning with the quarter ending September 30, 2019. The option granted at the exercise price of $146.48, vests in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning on December 31, 2020. The option granted at the exercise price of $145.35 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 2022-05-25