CoStar Group (CSGP)Chief Accounting Officer sold ~$127K

~$127K

Approx. value · 1,841 sh @ $68.79

23K

Holds after · shares reported

Traded

Nov 13, 2025

Filed

Nov 17, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Sep 22, 2025CongressDisclosed purchase of CSGP — reported range $1,001 - $15,000
2. Sep 25, 2025CongressDisclosed sale of CSGP — reported range $1,001 - $15,000
3. Sep 30, 2025CongressDisclosed purchase of CSGP — reported range $1,001 - $15,000
4. Oct 15, 2025CongressDisclosed purchase of CSGP — reported range $1,001 - $15,000
5. Oct 28, 2025Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
6. Nov 13, 2025 · this disclosureInsiderOfficer sold ~$127K of CSGP shares in the open market

What came next

1. Nov 13, 2025InsiderDirector sold ~$155K of CSGP shares in the open market
2. Dec 10, 2025CongressDisclosed purchase of CSGP — reported range $1,001 - $15,000
3. Jan 7, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On January 7, 2026, CoStar Realty Information, Inc., a subsidiary of CoStar Group, Inc. (“CoStar” or the “Company”), entered into a second amendment (the “Amendment”) to its employment agreement with Andrew C. Florance, Founder and Chief Executive Officer (“CEO”) of the Company (the “Employment Agreement”).”
4. Jan 28, 2026CongressDisclosed purchase of CSGP — reported range $1,001 - $15,000
5. Feb 13, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On February 13, 2026, CoStar Group, Inc., a Delaware corporation (“CoStar Group” or the “Company”), amended the CoStar Group Inc. Executive Severance Plan (as amended, the “Amended Severance Plan”) to remove a clause from the definition of “Change in Control” (the “director clause”) relating to the composition of the Board of Directors of the Company (the “Board”).”
6. Feb 24, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
7. Feb 27, 2026Insider · First insider buy since Oct 2024CEO purchased ~$2.48M of CSGP shares in the open market
8. Mar 2, 2026Insider · 2 peopleInsiders: 2 purchases (~$952K)
9. Mar 6, 2026Insider · 3 insiders in a week, a first since 2006Director purchased ~$48K of CSGP shares in the open market

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for CoStar Group

For CoStar Group, OQRO holds 3 insider filings (SEC Form 4 or Form 144), 1 Congress trade report and 19 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its CSGP page.

Other recent filings by Cynthia Cammett Cann, Chief Accounting Officer

• SEC Form 4 at CoStar Group (CSGP)Aug 10, 2026
• SEC Form 4 at CoStar Group (CSGP)Jul 29, 2025
• SEC Form 4 at CoStar Group (CSGP)Mar 14, 2025
• SEC Form 4 at CoStar Group (CSGP)Mar 14, 2025
• SEC Form 4 at CoStar Group (CSGP)Mar 14, 2025

The full history of Cynthia Cammett Cann, Chief Accounting Officer is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at CoStar Group

• House Clerk periodic transaction reportSep 10, 2026
• SEC Schedule 13GAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its CSGP page.