Chief Financial Officer

Director

CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.

Institution	Shares	Value	Change
Erste Asset Management GMBH	1,700,000	$50M	INCREASED
Douglas Lane & Associates	1,168,859	$33M	INCREASED
Riverbridge Partners	1,091,535	$31M	DECREASED
Peregrine Capital Management	692,753	$20M	DECREASED
Chicago Capital	526,958	$15M	DECREASED

Insider	Type	Shares	Value	Date
Christian M. Lown (Chief Financial Officer)	SELL	5,597	$164K	2026-07-01
Christine M Mccarthy (Director)	AWARD	8,262		2026-06-23
Louise S Sams (Director)	AWARD	8,262		2026-06-23
Robert W Musslewhite (Director)	AWARD	8,262		2026-06-23
Angelique G. Brunner (Director)	AWARD	8,262		2026-06-23

CoStar Group Inc (CSGP) Ownership & Trading Activity

Top Institutional Holders

Recent Insider Trades

Recent Congressional Trades