Form 4 Filing for CRA INTERNATIONAL, INC.

This filing details a Form 4 submission for CRA INTERNATIONAL, INC. (CRAI) concerning Eric Nierenberg, the EVP, CFO, and Treasurer. On April 9, 2026, Nierenberg acquired 911 Restricted Stock Units (RSUs) with a transaction code indicating acquisition and a price of $0.00. These RSUs are contingent rights to receive one share of the Issuer's common stock upon vesting. The RSUs vest in four equal annual installments starting on April 9, 2027. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs. Following this transaction, Nierenberg holds 911 RSUs.