COSTAR GROUP, INC. — Director's Dealing 2012

Oct 1, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2012-09-27

Reporting Person: BONDERMAN DAVID (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-27	Common Stock, par value $0.01 per share	A	872	—	Acquired	281958	Direct

Footnotes

F1: Represents all shares of Common Stock owned, consisting of 278,700 shares of Common Stock and 3,258 shares of Common Stock subject to unvested Restricted Stock Grants.