COSTAR GROUP, INC. — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP, INC. (CSGP)
CIK: 0001057352
Period of Report: 2026-03-01

Reporting Person: SAINT FREDERICK G. (President, Marketplaces)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-03-01	Common Stock, par value $0.01 per share	F	11096	$44.63	Disposed	259851	Direct
2026-03-02	Common Stock, par value $0.01 per share	P	20000	$45.33	Acquired	279851	Direct

Footnotes

F1: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63.

F2: Average based on sales prices ranging from $45.26 to $45.38