Canonical: https://ownershiptrace.com/13f/companies/155 # Who owns COSTAR GROUP, INC. (CSG)? Elite investor 13F holders 10 tracked elite investors reported holding COSTAR GROUP, INC as of 2026-06-30, including Polen Capital Management, Akre Capital Management, D.E. Shaw, Weitz Investment Management, Gotham Asset Management. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings. 10 tracked investors currently reported holding · Latest report period: 2026-06-30 · Industrials · Commercial & Professional Services CoStar Group, Inc. provides information, analytics, and online marketplace services to real estate and related business communities in the United States, Australia, Canada, Europe, the Asia Pacific, and Latin America. It offers CoStar Property that provides inventory of office, industrial, retail, multifamily, hospitality, and student housing, and land properties; CoStar Leasing, a data on lease… ## Reported holders and securities, including exits (up to 20) | Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | [Polen Capital Management](https://ownershiptrace.com/13f/investors/61) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-04 00:00:00 | 248063762.00 USD | 8759314.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1034524/0001172661-26-003035-index.html) | | [Akre Capital Management](https://ownershiptrace.com/13f/investors/19) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 331326895.00 USD | 11699396.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1112520/0001112520-26-000014-index.html) | | [D.E. Shaw](https://ownershiptrace.com/13f/investors/98) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 29547162.00 USD | 1043332.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1009207/0001104659-26-097217-index.html) | | [Tiger Global Management](https://ownershiptrace.com/13f/investors/15) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1167483/0000919574-26-005427-index.html) | | [Corvex Management](https://ownershiptrace.com/13f/investors/94) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1535472/0001011438-26-000545-index.html) | | [Weitz Investment Management](https://ownershiptrace.com/13f/investors/83) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-12 00:00:00 | 11984486.00 USD | 423181.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/883965/0001821268-26-000133-index.html) | | [Gotham Asset Management](https://ownershiptrace.com/13f/investors/94672) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 18011180.00 USD | 635988.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1510387/0001398344-26-014644-index.html) | | [Tudor Investment](https://ownershiptrace.com/13f/investors/94675) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 17770517.00 USD | 627490.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/923093/0000902664-26-003485-index.html) | | [ShawSpring Partners](https://ownershiptrace.com/13f/investors/28) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1766908/0001172661-26-003620-index.html) | | [Tsai Capital](https://ownershiptrace.com/13f/investors/94671) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 8332056.00 USD | 294211.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1574850/0001104659-26-095617-index.html) | | [GMO](https://ownershiptrace.com/13f/investors/94674) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 695652.00 USD | 24564.000000 | Shares | buy | [Original filing](https://www.sec.gov/Archives/edgar/data/1352662/0001072613-26-000636-index.html) | | [Hillman Capital Management](https://ownershiptrace.com/13f/investors/43) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 304298.00 USD | 10745.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1314620/0001398344-26-014467-index.html) | | [Ancora Advisors / Ancora Holdings](https://ownershiptrace.com/13f/investors/101) | COSTAR GROUP INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 1529.00 USD | 54.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1446114/0001446114-26-000012-index.html) | Public disclosures can be delayed, incomplete, or amended. 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