Hill John W plan to sell securities of COSTAR GROUP, INC. under Form 144

Hill John W filed Form 144 to notify SEC of plan to sell 3500 units of COSTAR GROUP, INC. securities around 2026-08-05, with aggregate market value of $106,067.50. The total outstanding units is 405197588.0. The amount planned to be sold represents 0.00% of total outstanding units;