CoStar Group Inc. (NASDAQ: CSGP) issued a statement addressing claims made by D. E. Shaw regarding the company's financial reporting practices.

The real estate information provider said it has never reported Homes.com results as a separate segment, contrary to D. E. Shaw's assertions. CoStar Group changed its reporting segments from geography-based to product portfolio-based to align with business operations. The company stated its new segment disclosure provides audited revenue, EBITDA, Adjusted EBITDA and margin disclosures for both Residential and Commercial segments in its recent 10-K filing.

CoStar Group disclosed that D. E. Shaw owns approximately 0.22% of CoStar Group's common stock based on public filings. The company stated that D. E. Shaw holds nearly four times that value in CoStar Group competitors, including Anywhere Real Estate, Compass, Opendoor Technologies, Rocket Companies, and Zillow, according to D.E. Shaw's fourth quarter 13F filing.

The company added Clare Locke LLP, described as a litigation boutique specializing in defamation matters, to its advisory team. CoStar Group's existing advisors include Goldman Sachs & Co. LLC as financial advisor, Latham & Watkins LLP as legal counsel, and Joele Frank as strategic communications advisor.

CoStar Group operates online real estate marketplaces and provides information, analytics, and digital twin technology in property markets. The company's brands include CoStar, LoopNet, Apartments.com, Homes.com, and Domain. CoStar Group reported that its websites attracted over 139 million average monthly unique visitors in the fourth quarter of 2025.