COSTAR GROUP, INC. — Director's Dealing 2018

Mar 9, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2018-03-07

Reporting Person: CARCHEDI FRANCIS (Executive VP, Corp. Dev.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-03-07	Common Stock, par value $0.01 per share	M	12100	$102.16	Acquired	40684	Direct
2018-03-07	Common Stock, par value $0.01 per share	S	12100	$356.09	Disposed	28584	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-03-07	Option to Acquire Common Stock	$102.16	M	12100	Disposed	2023-03-10	Common Stock (12100.0)	Direct

Footnotes

F1: Represents all shares of Common Stock owned, consisting of 22,470 shares of Common Stock and 18,214 shares of Common Stock subject to unvested Restricted Stock grants.

F2: Average based on sales prices ranging from $356 to $356.80.

F3: Represents all shares of Common Stock owned, consisting of 10,370 shares of Common Stock and 18,214 shares of Common Stock subject to unvested Restricted Stock grants.

F4: The option vested in three equal installments on March 11, 2014, March 11, 2015, and March 11, 2016.