144 0001351689 XXXXXXXX LIVE 0001057352 COSTAR GROUP, INC. 000-24531 1201 WILSON BLVD. ARLINGTON VA 22209 2023466500 Hill John W Director Member of immediate family of any of the foregoing Common Ameritas Investment Corp

5900 O street Lincoln NE 68501

2250 151920.00 423822791 11/13/2025 NASDAQ Common 09/15/2025 Payment for Services Rendered Costar N 787 09/15/2025 Compensation Common 09/15/2025 Payment for Services Rendered Costar N 922 09/15/2025 Compensation Common 09/14/2015 Payment for Services Rendered Costar N 340 09/14/2015 Compensation Common 09/14/2015 Payment for Services Rendered Costar N 201 09/14/2015 Compensation Y 11/13/2025 Jason Coleman as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for John Hill