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: FLORANCE ANDREW C (Director, President and CEO)

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	2198	$454.33	Disposed	129353	Direct
2019-03-04	Common Stock, par value $0.01 per share	M	55322	$102.16	Acquired	184675	Direct
2019-03-04	Common Stock, par value $0.01 per share	S	55322	$473.38	Disposed	129353	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-03-04	Option to Acquire Common Stock	$102.16	M	55322	Disposed	2023-03-10	Common Stock (55322.0)	Direct

Footnotes

F1: Represents all shares of Common Stock owned, consisting of 36,678 shares of Common Stock and 92,675 shares of Common Stock subject to unvested Restricted Stock grants.

F2: Represents all shares of Common Stock owned, consisting of 92,000 shares of Common Stock and 92,675 shares of Common Stock subject to unvested Restricted Stock grants.

F3: Average based on sales prices ranging from $468.14 to $480.

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