PRESS RELEASE

CoStar Group, Inc. (NASDAQ: CSGP), the leading provider of commercial real estate information, analytics and online marketplaces, today announced that Dan Beyers has joined the Company as Executive Editor and Vice President. An excellent business journalist and longtime news editor for The Washington Post, Beyers will oversee CoStar’s global news operation, which spans offices in the United States, Canada, United Kingdom and Germany and includes more than 40 journalists.

“Dan has tremendous experience and will be leading our effort to build a world-class news organization and establish CoStar as the industry’s most-read and most-respected source for commercial real estate news,” said Andrew Florance, CoStar Group Founder and Chief Executive Officer. “He has been a veteran news presence at The Washington Post, having served in a number of reporting and editing capacities at the newspaper where he earned a reputation for taking on challenges facing the print-based industry and helping it transition to the digital age, while upholding the highest journalistic standards.”

While at The Washington Post, Beyers served as founding editor of Capital Business, a subscription-based publication launched by The Post in 2010 to sharpen its focus on the region’s business community. He spun off new online verticals from that coverage to expand The Post’s digital presence, and launched Top Workplaces, an annual publication and live event aimed at the metropolitan area’s top employers. As a reporter and editor, he helmed beats including technology, government, education, local business and national industries.

Beyers’ appointment is a significant milestone in CoStar’s expansion of its award-winning news team, which added more than a dozen experienced business journalists located across the U.S. and in key international locations in the past year. The growing team allows CoStar to better tailor coverage for its readers, offering even greater insights into the markets and issues that matter to them. The expansion is part of a major initiative to enhance the company’s role as the industry’s leading source of commercial real estate information and data, building on its already established reputation as a trusted, insightful news resource for commercial real estate.

Beyers will be based in CoStar’s corporate headquarters in Washington, DC and report to Lisa Ruggles, Senior Vice President of Global Research.

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About CoStar Group, Inc.

CoStar Group, Inc. (NASDAQ: CSGP) is the leading provider of commercial real estate information, analytics and online marketplaces. Founded in 1987, CoStar conducts expansive, ongoing research to produce and maintain the largest and most comprehensive database of commercial real estate information. Our suite of online services enables clients to analyze, interpret and gain unmatched insight on commercial property values, market conditions and current availabilities. LoopNet is the most heavily trafficked commercial real estate marketplace online with over 5 million monthly unique visitors per month. Apartments.com, ApartmentFinder.com, ForRent.com, ApartmentHomeLiving.com, Westside Rentals, AFTER55.com, CorporateHousing.com, ForRentUniversity.com and Apartamentos.com form the premier online apartment resource for renters seeking great apartment homes and provide property managers and owners a proven platform for marketing their properties. CoStar Group's websites attracted an average of approximately 34 million unique monthly visitors in aggregate throughout 2017. Headquartered in Washington, DC, CoStar maintains offices throughout the U.S. and in Europe and Canada with a staff of over 3,700 worldwide, including the industry's largest professional research organization. For more information, visit www.costargroup.com.          

For additional information contact:

Richard Simonelli
Vice President
CoStar Group
(973) 896-8184
rsimonelli@costar.com

This news release includes “forward-looking statements” including, without limitation, statements regarding CoStar’s expectations, beliefs, intentions or strategies regarding the future. These statements are based upon current beliefs and are subject to many risks and uncertainties that could cause actual results to differ materially from these statements, including the risk that the company’s expansion of its news team does not produce the expected results, including better tailored coverage, greater insights and establishing CoStar as the industry’s most-read and most-respected source for commercial real estate news. More information about potential factors that could cause results to differ materially from those anticipated in the forward-looking statements include, but are not limited to, those stated in CoStar’s filings from time to time with the Securities and Exchange Commission, including in CoStar’s Annual Report on Form 10-K for the year ended December 31, 2017, which is filed with the SEC, including in the “Risk Factors” section of that filing, as well as CoStar’s other filings with the SEC available at the SEC’s website (www.sec.gov). All forward-looking statements are based on information available to CoStar on the date hereof, and CoStar assumes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.