144 0001647629 XXXXXXXX LIVE 0001053706 CRA INTERNATIONAL, INC. 000-24049 200 CLARENDON STREET BOSTON MA 02116 617-425-3001 Thomas Aiken Avery Director Common Stock Raymond James Financial

800 Carillon Parkway St. Petersburg FL 33716

1000 138054 6964640 03/04/2024 Nasdaq Common Stock 07/08/2022 Restricted Stock Vesting CRA International, Inc. N 343 07/08/2022 Compensation Common Stock 07/28/2022 Restricted Stock Vesting CRA International, Inc. N 291 07/28/2022 Compensation Common Stock 07/19/2023 Restricted Stock Vesting CRA International, Inc. N 270 07/19/2023 Compensation Common Stock 07/28/2023 Restricted Stock Vesting CRA International, Inc. N 96 07/28/2023 Compensation Y 03/04/2024 Delia J. Makhlouta, by power of attorney