CoStar Group adds Louise Sams and Robert Musslewhite to its Board of Directors

– USA, DC – CoStar Group, Inc. (NASDAQ: CSGP) today announced the expansion of its Board of Directors to nine members with the appointment of two new directors, Louise S. Sams and Robert W. Musslewhite.

“As CoStar Group continues to grow and diversify our business both in product scope and internationally, I’m excited to have new members with experience in large, diverse international organizations,” said Andrew Florance, Founder and CEO of CoStar Group. “By electing Ms. Sams and Mr. Musslewhite, the Board gains significant corporate experience, enhancing its independence, depth of experience and diversity.”

About Louise Sams

Louise Sams joins the Board with extensive experience as both a media executive and a practicing attorney. As a result of her broad range of business and legal experience, Sams brings valuable business development, corporate governance, technology, and international experience to the Board. Previously, Sams was the Executive Vice President and General Counsel of Turner Broadcasting System, Inc., overseeing legal work related to all of the business activities of Turner and its subsidiaries worldwide. Most recently, Sams’ focus was on issues related to technology, information security, use of data and consumer privacy, as well as enterprise-wide risk management.

About Robert Musslewhite

Robert Musslewhite joins the Board with nearly twenty years of leadership experience in information services businesses, including The Advisory Board Company (Nasdaq: ABCO) where he served as Chairman and Chief Executive Officer. Now, following the acquisition of ABCO by Optum, Musslewhite is the Chief Executive Officer of OptumInsight. He brings an abundance of experience in executive management and leadership; business operations and development; growth strategies; and research and technology. Prior to ABCO, Musslewhite served as an Associate Principal with McKinsey & Company, a global management consulting firm. He also serves on the board of Ascend Learning.

About CoStar Group, Inc.

CoStar Group, Inc. 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. STR provides premium data benchmarking, analytics and marketplace insights for the global hospitality sector. LoopNet is the most heavily trafficked commercial real estate marketplace online with over 6 million monthly unique visitors. Realla is the UK’s most comprehensive commercial property digital marketplace.,,,,,,, and 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 over 51 million unique monthly visitors in aggregate in the third quarter of 2019. Headquartered in Washington, DC, CoStar maintains offices throughout the U.S. and in Europe and Canada with a staff of over 4,300 worldwide, including the industry’s largest professional research organization.

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