CURRENT REPORT, ITEMS 2.02, 9.01

Company

COSTAR GROUP, INC.

Filed

October 21, 2010

Period of Report

October 20, 2010

Accession Number

0001057352-10-000074

An 8-K is a current report used to announce material events that shareholders should know about — such as earnings releases, mergers, executive changes, or bankruptcy. Learn more about 8-K filings →