X0306 4 2021-09-17 0 0001866550 Thoughtworks Holding, Inc. TWKS 0001882300 Wathington Chad-Affonso C/O THOUGHTWORKS HOLDING, INC. 200 EAST RANDOLPH STREET, 25TH FLOOR CHICAGO IL 60601 0 1 0 0 Chief Strategy Officer Common Stock 2021-09-17 4 S 0 58834 19.85 D 122897 I By trust Common Stock 2021-09-21 4 A 0 44061 0.00 A 44061 D Options to purchase common stock 2.29 2021-09-17 4 A 0 199317.76 0.00 A 2021-09-17 2027-10-12 Common Stock 199317.76 693146 D Options to purchase common stock 2.29 2021-09-17 4 A 0 17092.02 0.00 A 2021-09-17 2028-06-08 Common Stock 17092.02 65370 D Options to purchase common stock 5.16 2021-09-17 4 A 0 8644 0.00 A 2021-09-17 2030-09-15 Common Stock 8644 15253 D Stock appreciation rights 2021-09-21 4 D 0 2005 0.00 D Common Stock 2005 0 D The reported securities are restricted stock units ("RSUs"), which vest and settle 50% on each of the 6 month and 12 month anniversaries of grant, and include 1,786 RSUs received in exchange for New SARs (as defined below). 20,644.52 of the reported securities remain subject to time-based vesting. 7,081.11 of the reported securities remain subject to time-based vesting. 6,609.00 of the reported securities remain subject to time-based vesting. The reported securities represented SARs with respect to the Class C Common Stock of the Company, which became SARs (the "New SARs") on the Company's common stock upon completion of the Company's initial public offering (the "IPO") on September 17, 2021. In connection with the IPO, the New SARs were exchanged for RSUs on the Company's common stock. /s/ Christine McKillip as Attorney-in-Fact for the Reporting Person 2021-09-21