Ruggles Lisa 4
4 · COSTAR GROUP, INC. · Filed Mar 3, 2026
Insider Transaction Report
Form 4
Ruggles Lisa
Senior VP, Global Operations
Transactions
- Tax Payment
Common Stock, par value $0.01 per share
[F1]2026-03-01$44.63/sh−8,931$398,591→ 177,892 total - Award
Restricted Stock Units
[F2][F3]2026-02-27+28,197→ 28,197 total→ Common Stock, par value $0.01 per share (28,197 underlying)
Footnotes (3)
- [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]Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.
- [F3]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