Andrew C. Florance - 04 Aug 2026 Form 4 Insider Report for COSTAR GROUP, INC. (CSGP)

Reporting relationship: Founder and CEO, Director
Issuer ticker: CSGP
Reported as of: 04 Aug 2026
Net transaction value: +$2,489,837
SEC form: 4
Accepted by SEC: 05 Aug 2026, 09:27:00 UTC
Prior SEC filing: 04 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Gene Boxer, Attorney-in-Fact

Key filing fact

Andrew C. Florance filed Form 4 for COSTAR GROUP, INC. (CSGP) on 05 Aug 2026.

Key facts

This page summarizes Andrew C. Florance's Form 4 filing for COSTAR GROUP, INC. (CSGP).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Aug 2026, 09:27.

Change

Previous filing in this sequence was filed on 04 May 2026.
Current net transaction value: +$2,489,837.

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 0001066061 Primary reporting owner

FLORANCE ANDREW C

Relationship: Founder and CEO, Director
Address: C/O COSTAR GROUP, INC., 1201 WILSON BLVD., ARLINGTON
Signature: /s/ Gene Boxer, Attorney-in-Fact
Signature date: 05 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CSGP transaction

Common Stock, par value $0.01 per share

Purchase

Transaction value: $2,489,837
Shares: +83,300
Change %: +4.8%
Price: $29.89
Shares after: 1,806,165
Date: 04 Aug 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Average based on sales prices ranging from $29.57 to $29.99.

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