144 0001701764 XXXXXXXX LIVE 0001053706 CRA INTERNATIONAL, INC. 000-24049 200 CLARENDON STREET BOSTON MA 02116 617-425-3000 Jonathan D. Yellin Officer Common Robert W. Baird

777 E. Wisconsin Avenue Milwaukee WI 53202

1750 328000.40 6583794 08/20/2025 Nasdaq Common 04/11/2024 RSU Vesting CRA International, Inc. N 215 04/11/2024 Compensation Common 03/22/2024 RSU Vesting CRA International, Inc. N 282 03/22/2024 Compensation Common 03/22/2024 PRSU Vesting CRA International, Inc. N 508 03/22/2024 Compensation Common 03/10/2024 RSU Vesting CRA International, Inc. N 269 03/10/2024 Compensation Common 03/04/2024 PRSU Vesting CRA International, Inc. N 476 03/04/2024 Compensation Y 08/20/2025 08/08/2024 Delia J. Makhlouta, by power of attorney