...- U.S.-based CoStar Group Inc. is the leading provider of information, analytics, and marketing solutions to the U.S. commercial real estate (CRE) industry. We expect the company to generate revenue of about $1.6 billion and S&P Global Ratings-adjusted EBITDA of about $515 million in 2020. - We are assigning a '##+' long-term issuer credit rating to CoStar, and our '##+' issue-level rating and '3' recovery rating to the proposed senior unsecured notes. - CoStar benefits from significant growth opportunities for its property technology and CRE business intelligence and information because of its network scale and high quality and proprietary datasets. - However, in comparison to its higher-rated peers, the company has lower revenue scale, diversification, or EBITDA margins. - The outlook is stable, reflecting our view that CoStar will continue to benefit from its leading position in its core U.S. market, and generate adjusted EBITDA margins above 32%, reported free operating cash flow (FOCF)...