COSTAR GROUP, INC. — Director's Dealing 2026

Mar 4, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COSTAR GROUP, INC. (CSGP)
CIK: 0001057352
Period of Report: 2026-02-27

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

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-27	Restricted Stock Units	$	A	39652	Acquired		Common Stock, par value $0.01 per share (39652)	Direct

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.

F2: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029.