SEC Form 3 · accession 0002146463-26-000003
COSTAR GROUP, INC. · CSGP
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Robin Jack Rossmann
Officer — Chief Financial Officer
Period of report
Jul 31, 2026
Accepted (ET)
Aug 4, 2026 · 5:22 pm EDT
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001057352
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock, par value $0.01 per share | holding | — | — | — | 86,691 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF2,F1 | — | holding | — | — | — | — | — | Common Stock, par value $0.01 per share | 10,223 | — | D |
Explanation of responses
- F1The restricted stock units vest in four equal installments on March 15, 2027, March 15, 2028, March 15, 2029, and March 15, 2030.
- F2Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.
Remarks
Exhibit 24 - Power of Attorney