Robin Jack Rossmann

Insider Reports History

Reporting-owner location: Arlington, VA
Latest reporting-owner signature: /s/ Gene Boxer, Attorney-in-Fact
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Robin Jack Rossmann

Form 4 holding Chief Financial Officer

COSTAR GROUP, INC.

Security class: Common Stock, par value $0.01 per share
Shares / value: 85,935
Estimated value: $2,354,619
Report date: 15 Oct 2026
Price: $27.40
Ownership: Direct

Form 4 holding Chief Financial Officer

COSTAR GROUP, INC.

Security class: Restricted Stock Units
Shares / value: 34,771
Estimated value
Report date: 31 Jul 2026
Price
Ownership: Direct
Underlying class: Common Stock, par value $0.01 per share
Underlying amount

Insider Reports Filed by Robin Jack Rossmann

4 CSGP

COSTAR GROUP, INC.

Report period: 15 Oct 2026
Transactions: 1
Transaction value: $0
Accepted by SEC: 16 Oct 2026, 17:32
Role: Chief Financial Officer
Next action: Open filing details

4 CSGP

COSTAR GROUP, INC.

Report period: 31 Jul 2026
Transactions: 1
Transaction value: $0
Accepted by SEC: 04 Aug 2026, 17:24
Role: Chief Financial Officer
Next action: Open filing details

3 CSGP

COSTAR GROUP, INC.

Report period: 31 Jul 2026
Transactions: 0
Transaction value: $0
Accepted by SEC: 04 Aug 2026, 17:22
Role: Chief Financial Officer
Next action: Open filing details

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