PRESS RELEASE DETAIL


Jan 18, 2008

CoStar Group Prices Public Offering for 1.45 Million Shares

2003-10-28 2003 CoStar Group Prices Public Offering for 1.45 Million Shares

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP), the leading provider of...

2003-10-28 2003 CoStar Group Prices Public Offering for 1.45 Million Shares

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP), the leading provider of information services to commercial real estate professionals in the United States and the United Kingdom, announced the pricing terms for its public offering. The offering has been increased to 1,450,000 shares of common stock, and the shares will be sold at a price of $34.25 per share. All of the shares are being offered by the Company. The underwriters have the option to purchase up to an additional 217,500 shares to cover over-allotments, if any. The managing underwriters for the offering are Needham & Company, Inc., William Blair & Co. and JMP Securities LLC.

These securities are offered only by means of a written prospectus, and this press release is neither an offer to sell nor a solicitation of an offer to buy. A copy of the prospectus can be obtained from Needham & Company, Inc., 445 Park Avenue, New York, NY 10022; William Blair & Co., 222 West Adams Street, Chicago, IL 60606; or JMP Securities LLC, One Embarcadero Center, Suite 2100, San Francisco, CA 94111.

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 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 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-Q/A for the quarter ended June 30, 2003, under the heading "Risk Factors". All forward-looking statements are based on information available to CoStar on the date hereof, and CoStar assumes no obligation to update such statements.
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