X0508 4 2025-11-20 0001053706 CRA INTERNATIONAL, INC. CRAI 0001701764 Yellin Jonathan D 200 CLARENDON STREET BOSTON MA 02116 false true false false EVP AND GENERAL COUNSEL 1 Common Stock 2025-11-20 4 S 0 1317 174.1586 D 16006 D Common Stock 2025-11-20 4 S 0 343 174.8737 D 15663 D Common Stock 2025-11-20 4 S 0 60 175.4279 D 15603 D Common Stock 2025-11-20 4 S 0 30 176.3925 D 15573 D The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $173.59 to $174.56, 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. These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024. The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $174.60 to $175.20, 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. The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $175.22 to $175.75, 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. The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $176.31 to $176.8050, 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. Delia J. Makhlouta, by power of attorney 2025-11-24