COSTAR GROUP, INC. — Director's Dealing 2018

Mar 1, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2018-02-28

Reporting Person: Ruggles Lisa (Senior VP, Global Research)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-02-28	Common Stock, par value $0.01 per share	A	5460	—	Acquired	10805	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-02-28	Option to Acquire Common Stock	$342.13	A	6500	Acquired	2028-02-27	Common Stock (6500.0)	Direct

Footnotes

F1: Includes a grant of 3,300 shares of restricted common stock that vest in three equal installments on February 28, 2019, February 29, 2020 and February 28, 2021, and a grant of 2,160 shares of restricted common stock that vest based upon CoStar Group, Inc.'s achievement of a three-year performance goal.

F2: Represents all shares of Common Stock owned, consisting of 405 shares of Common Stock and 10,400 shares of Common Stock subject to unvested Restricted Stock grants.

F3: The option vests in three equal installments on February 28, 2019, February 29, 2020 and February 28, 2021.