Shareholder Information

Stock Listing

Symbol: CSGP
NASDAQ List

Independent Auditors

Ernst & Young LLP
8484 Westpark Drive
McLean, VA 22102

Transfer Agent & Register

American Stock Transfer & Trust Company, LLC
6201 15th Avenue
Brooklyn, NY 11219

Investor Relations

Richard Simonelli

Senior Director, Investor Relations
202-346-6394
rsimonelli@costar.com