CoStar Group (CSGP)Polen Capital Management LLC reduced its stake -3.81M shares

8.76M

Shares reported · -3.81M vs prior quarter

2.1%

Disclosed portfolio weight

$248M

Reported value

Holdings as of

Jun 30, 2026

Filed

Aug 4, 2026

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. Jun 23, 2026Company filing · Form 8-K · Executive change, Shareholder voteChanged a top executive or board member, and held a shareholder vote (and 1 more item)“On June 23, 2026, at the Annual Meeting of Stockholders (the “Annual Meeting”) of CoStar Group, Inc. (the “Company” or “our”), the stockholders of the Company, upon the recommendation of the Board of Directors of the Company (the “Board”), approved the CoStar Group, Inc. 2026 Employee Stock Purchase Plan (the “2026 ESPP”), which was approved by the Board on April 27, 2026 and became effective upon stockholder…”
2. Jul 7, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On July 13, 2026, the Board of Directors (the “Board”) of CoStar Group, Inc. (the “Company” or “CoStar Group”) appointed Robin Rossmann to serve as the Company’s Chief Financial Officer, effective July 31, 2026 (“Effective Date”).”
3. Jul 28, 2026Company filing · Form 8-K · ResultsReported its results
4. Aug 4, 2026InsiderCEO purchased ~$2.49M of CSGP shares in the open market

What came next

1. Aug 5, 2026InsiderDirector sold ~$106K of CSGP shares in the open market
2. Aug 7, 2026InsiderOfficer sold ~$147K of CSGP shares in the open market
3. Aug 14, 20265% stakeBaron Capital Group, Inc. reported a passive stake (13G) of 5.3%
4. Aug 19, 2026CongressDisclosed purchase of CSGP — reported range $1,001 - $15,000

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

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.

How this filing works

• SEC Form 13F

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.