COSTAR GROUP, INC. — Director's Dealing 2019

Mar 4, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP INC (CSGP)
CIK: 0001057352
Period of Report: 2019-02-28

Reporting Person: Linnington Matthew (Executive VP, Sales)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-02-28	Common Stock, par value $0.01 per share	F	372	$454.33	Disposed	30862	Direct
2019-03-01	Common Stock, par value $0.01 per share	M	516	$193.69	Acquired	31378	Direct
2019-03-01	Common Stock, par value $0.01 per share	S	4701	$477.31	Disposed	26677	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-03-01	Option to Acquire Common Stock	$193.69	M	516	Disposed	2025-03-04	Common Stock (516.0)	Direct

Footnotes

F1: Represents all shares of Common Stock owned, consisting of 8,941 shares of Common Stock and 21,921 shares of Common Stock subject to unvested Restricted Stock grants.

F2: Represents all shares of Common Stock owned, consisting of 9,457 shares of Common Stock and 21,921 shares of Common Stock subject to unvested Restricted Stock grants.

F3: Average based on sales prices ranging from $474.59 to $478.26.

F4: Represents all shares of Common Stock owned, consisting of 4,756 shares of Common Stock and 21,921 shares of Common Stock subject to unvested Restricted Stock grants.

F5: The option vested in three equal installments on March 5, 2016, March 5, 2017 and March 5, 2018.