Form 4 Filing for COSTAR GROUP, INC. - Musslewhite Robert W

This filing details a transaction by Robert W. Musslewhite, a director at COSTAR GROUP, INC. (CSGP). On June 23, 2026, Mr. Musslewhite acquired 8,262 shares of common stock through a restricted stock award with a transaction price of $0.00. This award vests fully on the earlier of the first anniversary of the grant date or the company's 2027 Annual Meeting of Stockholders. Following this transaction, Mr. Musslewhite directly owns 26,539 shares of common stock. The filing is made on Form 4 and was signed by an attorney-in-fact on June 24, 2026.