DESMARAIS MICHAEL J 4
4 · COSTAR GROUP, INC. · Filed Mar 3, 2026
Insider Transaction Report
Form 4
DESMARAIS MICHAEL J
Chief Human Resources Officer
Transactions
- Tax Payment
Common Stock, par value $0.01 per share
[F1][F2]2026-03-01$44.63/sh−6,353$283,534→ 72,922 total - Award
Restricted Stock Units
[F3][F4]2026-02-27+17,926→ 17,926 total→ Common Stock, par value $0.01 per share (17,926 underlying)
Footnotes (4)
- [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]Includes 157 shares acquired under the CoStar Group, Inc. Employee Stock Purchase Plan.
- [F3]Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.
- [F4]The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029.
Signature
/s/ Gene Boxer, Attorney-in-Fact|2026-03-03