COSTAR GROUP, INC. — Director's Dealing 2012

Sep 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2012-09-09

Reporting Person: FLORANCE ANDREW C (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-09	Common Stock, par value $0.01 per share	A	31	—	Acquired	309230	Direct

Footnotes

F1: Service award granted by the Company for the reporting person's 25-year anniversary of employment. The closing stock price of the Company's common stock on the trading day immediately preceding the date of grant was $82.26.

F2: Represents all shares of Common Stock owned, consisting of 118,629 shares of Common Stock and 190,601 shares of Common Stock subject to unvested Restricted Stock Grants.