COSTAR GROUP, INC. — Director's Dealing 2018

Jul 31, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2018-07-27

Reporting Person: Wheeler Scott T (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-07-27	Common Stock, par value $0.01 per share	M	4700	$204.91	Acquired	33223	Direct
2018-07-27	Common Stock, par value $0.01 per share	S	4700	$426.02	Disposed	28523	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-07-27	Option to Acquire Common Stock	$204.91	M	4700	Disposed	2027-03-01	Common Stock (4700.0)	Direct

Footnotes

F1: Represents all shares of Common Stock owned, consisting of 8,043 shares of Common Stock and 25,180 shares of Common Stock subject to unvested Restricted Stock grants.

F2: Average based on sales prices ranging from $424.52 to $426.69.

F3: Represents all shares of Common Stock owned, consisting of 3,343 shares of Common Stock and 25,180 shares of Common Stock subject to unvested Restricted Stock grants.

F4: The option vests in three equal installments on March 31, 2018, March 31, 2019 and March 31, 2020.