X0609 4 2026-08-31 0001053706 CRA INTERNATIONAL, INC. CRAI 0001379160 Maleh Paul A false 200 CLARENDON STREET BOSTON MA 02116 true true false false PRESIDENT AND CEO 1 Common Stock 2026-08-31 4 S 0 2348 172.0589 D 108702 D Common Stock 2026-08-31 4 S 0 4852 173.0412 D 103850 D Common Stock 2026-08-31 4 S 0 268 174.1276 D 103582 D Common Stock 2026-08-31 4 S 0 32 174.7834 D 103550 D The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $171.545 to $172.4575, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range. These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 19, 2025. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $172.58 to $173.5175, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $173.735 to $174.36, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $174.70 to $174.85, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range. Delia J. Makhlouta, by power of attorney 2026-09-02