CoStar Group faces four consolidated antitrust lawsuits in a Virginia federal court. The litigation accuses the real estate data giant of leveraging its dominant position to suppress competition within the commercial real estate sector.
Plaintiffs allege CoStar controls approximately 80% of the market. The company reportedly uses restrictive contracts to prevent customers from sharing data with rival platforms.
These consolidated cases seek financial damages and court-ordered changes to foster competition.
Separately, CoStar is contending with a proposed class-action lawsuit alleging its platform facilitated a price-fixing scheme among brokerage firms. This suit claims the company helped inflate commercial rents.
CoStar is currently seeking to have the price-fixing lawsuit dismissed.