Robin Jack Rossmann - 31 Jul 2026 Form 4 Insider Report for COSTAR GROUP, INC. (CSGP)

Reporting relationship: Chief Financial Officer
Issuer ticker: CSGP
Reported as of: 31 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Aug 2026, 17:24:47 UTC
Source filing: View source filing
Reporting owner signature: /s/ Gene Boxer, Attorney-in-Fact

Key filing fact

Robin Jack Rossmann filed Form 4 for COSTAR GROUP, INC. (CSGP) on 04 Aug 2026.

Key facts

This page summarizes Robin Jack Rossmann's Form 4 filing for COSTAR GROUP, INC. (CSGP).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 04 Aug 2026, 17:24.

Change

No earlier filing in this sequence is available for direct comparison.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002146463 Primary reporting owner

Rossmann Robin Jack

Relationship: Chief Financial Officer
Address: C/O COSTAR GROUP, INC., 1201 WILSON BLVD., ARLINGTON
Signature: /s/ Gene Boxer, Attorney-in-Fact
Signature date: 04 Aug 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CSGP transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +34,771
Change %
Price: $0.000000^*
Shares after: 34,771
Date: 31 Jul 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01 per share
Underlying amount: 34,771
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.

Footnote F2

The restricted stock units vest in three equal installments on August 1, 2027, August 1, 2028 and August 1, 2029.

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