Frank Simuro - Mar 1, 2023 Form 4 Insider Report for COSTAR GROUP, INC. (CSGP)

Role: Chief Technology Officer
Signature: /s/ Michael Rosenthall, Attorney-in-Fact
Stock symbol: CSGP
Transactions as of: Mar 1, 2023
Transactions value $: -$2,538,588
Form type: 4
Date filed: 3/3/2023, 04:45 PM
Previous filing: Feb 16, 2023
Next filing: Mar 21, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CSGP	Common Stock, par value $0.01 per share	Tax liability	-$430K	-6.09K	-1.77%	$70.66	338K	Mar 1, 2023	Direct
transaction	CSGP	Common Stock, par value $0.01 per share	Options Exercise	$360K	+35.2K	+10.43%	$10.22^*	373K	Mar 1, 2023	Direct
transaction	CSGP	Common Stock, par value $0.01 per share	Sale	-$2.47M	-35.2K	-9.45%	$70.09	338K	Mar 1, 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CSGP	Option to Acquire Common Stock	Options Exercise	$0	-35.2K	-100%	$0.00^*	0	Mar 1, 2023	Common Stock	35.2K	$10.22	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Average based on sales prices ranging from $69.92 to $70.37.
F2	The option vested in three equal installments on March 11, 2014, March 11, 2015, and March 11, 2016.