144 0001379160 XXXXXXXX LIVE 0001053706 CRA INTERNATIONAL, INC. 000-24049 200 CLARENDON STREET BOSTON MA 02116 617-425-3000 Paul A. Maleh Officer Director Common Robert W. Baird

777 E. Wisconsin Avenue Milwaukee WI 53202

7500 1026244.50 6270926 06/03/2026 Nasdaq Common 03/10/2026 RSU Vesting CRA International, Inc. N 967 03/10/2026 Compensation Common 03/10/2026 PRSU Vesting CRA International, Inc. N 1393 03/10/2026 Compensation Common 04/11/2026 RSU Vesting CRA International, Inc. N 776 04/11/2026 Compensation Common 04/11/2026 PRSU Vesting CRA International, Inc. N 1363 04/11/2026 Compensation Common 04/29/2026 RSU Vesting CRA International, Inc. N 731 04/11/2026 Compensation Common 03/02/2026 PRSU Vesting CRA International, Inc. N 2270 03/02/2026 Compensation N Paul A. Maleh

CRA INTERNATIONAL, INC. 200 CLARENDON STREET Boston MA 02116

Common 03/17/2026 7500 1166265 06/03/2026 11/19/2025 Delia J. Makhlouta, by power of attorney