PRESS RELEASE DETAIL


Apr 04, 2013

CoStar Group to Report First Quarter 2013 Financial Results on April 24, 2013

Earnings Release to be Issued After Market Close on Wednesday, April 24; Conference Call to Discuss First Quarter 2013 Financial Results Scheduled for 11:00 AM EDT on Thursday, April 25

WASHINGTON, DC, April 4, 2013 — CoStar Group, Inc. (NASDAQ: CSGP) will announce financial results for the first quarter of 2013 following the market close on Wednesday, April 24, 2013. Management will conduct a conference call to discuss the first quarter results at 11:00 AM EDT on Thursday, April 25, 2013.

To participate in the conference call, please dial (800) 230-1074 (from the United States and Canada) or (612) 288-0329 (from all other countries) and refer to conference code 287842. To listen to the conference call over the Internet, please access the audio webcast link available in the Investors section of CoStar's website at www.CoStar.com/investors.aspx.

An audio recording of the conference call will be available for replay approximately one hour after the call's completion and will remain available for a period of time following the call. To access the recorded conference call, please dial (800) 475-6701 (from the U.S. and Canada) or (320) 365-3844 (from all other countries) using access code 287842. The webcast replay will also be available in the Investors section of CoStar's website for a period of time following the call.

About CoStar Group, Inc.

CoStar Group (NASDAQ: CSGP) is commercial real estate's leading provider of information, analytics and marketing services. 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. Through LoopNet, the Company operates the most heavily trafficked commercial real estate marketplace online with more than 6.7 million registered members. CoStar operates websites that have over 10 million unique monthly visitors in aggregate. Headquartered in Washington, DC, CoStar maintains offices throughout the U.S. and in Europe including the industry's largest professional research organization. For more information, visit www.costar.com.



This news release includes "forward-looking statements" including, without limitation, statements regarding CoStar's plans, objectives, expectations, beliefs, intentions or strategies regarding the future. These statements are based upon the current beliefs and expectations of management of CoStar and are subject to many risks and uncertainties that could cause actual results to differ materially from these statements. More information about potential factors that could cause actual results to differ materially from those discussed 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 CoStar's Form 10-K for the year ended December 31, 2012, under the heading "Risk Factors."  All forward-looking statements are based on information available to CoStar on the date hereof, and CoStar does not undertake any obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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