CSGP Filing
4Filing Date: Jun 24, 2026
COSTAR GROUP, INC. (CSGP) · Insider Trading (Form 4) SEC Filing
Statement of Changes in Beneficial Ownership
descriptionView SEC Filing
ACC: 0001390194-26-000002open_in_new
Total Value$0
Trades1
Insiders1
Transaction Details
Musslewhite Robert W
Director·Direct
Grant · Acquire
Common Stock, par value $0.01 per share
Shares+8.26K
Price$0.00
Total Value$0
Shares Owned After26.54K
Transaction DateJun 23, 2026
Footnotes ▸
The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders.
Post-Transaction Holdings
Musslewhite Robert W
| Security | Shares | Change |
|---|---|---|
| Common Stock, par value $0.01 per share | 26.54K | +8.26K (45.20%) |
Original SEC Filing Textexpand_more
=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-06-23
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: COSTAR GROUP, INC. (CSGP)
CIK: 0001057352
--- Reporting Owner ---
Name: Musslewhite Robert W
CIK: 0001390194
Role: Director
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock, par value $0.01 per share
Date: 2026-06-23 | Code: A (Grant or award)
Shares: +8,262 | Price: $0.00
Shares Owned After: 26,539 | Ownership: D (Direct)
Footnotes:
[F1] The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders.
--- Footnotes (Complete Index) ---
F1: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders.
--- Signature ---
/s/ /s/ Gene Boxer, Attorney-in-Fact (2026-06-24)