COSTAR GROUP, INC. — Director's Dealing 2013

Nov 22, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2013-11-20

Reporting Person: Radecki Brian J (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-11-20	Common Stock, par value $0.01 per share	S	2000	$177.23	Disposed	68671	Direct
2013-11-21	Common Stock, par value $0.01 per share	S	2500	$180.91	Disposed	66171	Direct
2013-11-22	Common Stock, par value $0.01 per share	S	4000	$181.02	Disposed	62171	Direct

Footnotes

F1: Average based on sales prices ranging from $177.18 to $177.29.

F2: Represents all shares of Common Stock owned, consisting of 17,904 shares of Common Stock and 50,767 shares of Common Stock subject to unvested Restricted Stock Grants.

F3: Average based on sales prices ranging from $180.55 to $181.10.

F4: Represents all shares of Common Stock owned, consisting of 15,404 shares of Common Stock and 50,767 shares of Common Stock subject to unvested Restricted Stock Grants.

F5: Average based on sales prices ranging from $181.00 to $181.20).

F6: Represents all shares of Common Stock owned, consisting of 11,404 shares of Common Stock and 50,767 shares of Common Stock subject to unvested Restricted Stock Grants.