| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| SAINT FREDERICK G. | President, Marketplaces | C/O COSTAR GROUP, INC., 1201 WILSON BLVD., ARLINGTON | /s/ Gene Boxer, Attorney-in-Fact | 23 Feb 2026 | 0001500076 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CSGP | Common Stock, par value $0.01 per share | Disposed to Issuer | $0 | -17,583 | -6% | $0.000000 | 273,096 | 19 Feb 2026 | Direct | F1 |
| transaction | CSGP | Common Stock, par value $0.01 per share | Tax liability | $105,451 | -2,149 | -0.79% | $49.07 | 270,947 | 19 Feb 2026 | Direct | F2 |
| Id | Content |
|---|---|
| F1 | Shares forfeited from February 14, 2023 performance restricted stock grant upon certification of actual achievement of the performance goal by the Compensation Committee. |
| F2 | On February 19, 2026, the closing price of the Company's Common Stock on Nasdaq was $49.07. |