Who Owns CoStar Group?
Updated onExplore the ownership hierarchy of CoStar Group. See parent companies, holding structures, and ultimate controllers.
Ownership Chain
CoStar Group
CoStar Group is a publicly traded American company that provides real estate information, analytics, and online marketplaces for commercial and residential property industries worldwide.
CoStar Group appears to be independent with no known parent company.
CoStar Group
CoStar Group is a publicly traded American company that provides real estate information, analytics, and online marketplaces for commercial and residential property industries worldwide.
CoStar Group appears to be independent with no known parent company.
Major Shareholders
CoStar Group
Major Shareholders
| Name | Type | Ownership | Voting | As of |
|---|---|---|---|---|
The Vanguard Group, Inc. Largest institutional shareholder of CoStar Group based on latest reported holdings around 70 million shares or roughly 16.5% of shares outstanding as of September 30, 2025. | Institutional | 16.5% | 16.5% | Sep 2025 |
BlackRock, Inc. Second-largest institutional holder, with approximately 36 million shares (about 8.5% of CoStar Group) as of September 30, 2025. | Institutional | 8.5% | 8.5% | Sep 2025 |
Baron Capital Group, Inc. Long-term active investment manager holding roughly 19.3 million CoStar Group shares (about 4.5%) as of September 30, 2025. | Institutional | 4.5% | 4.5% | Sep 2025 |
Principal Global Investors, LLC Asset manager within Principal Financial’s group; owns about 18.7 million CoStar Group shares (around 4.4%) as of September 30, 2025. | Institutional | 4.4% | 4.4% | Sep 2025 |
State Street Global Advisors, Inc. Index and ETF manager (including SPDR funds) holding roughly 18.3 million CoStar Group shares (about 4.3%) as of September 30, 2025. | Institutional | 4.3% | 4.3% | Sep 2025 |
Geode Capital Management, LLC Institutional manager closely associated with Vanguard index strategies; holds about 12.6 million CoStar Group shares (about 3.0%) as of September 30, 2025. | Institutional | 3.0% | 3.0% | Sep 2025 |
Capital Research and Management Company Active manager for American Funds; owns approximately 11.8 million CoStar Group shares (about 2.8%) as of September 30, 2025. | Institutional | 2.8% | 2.8% | Sep 2025 |
Akre Capital Management, LLC Concentrated long-term investor; holds about 9.3 million CoStar Group shares (roughly 2.2%) as of September 30, 2025. | Institutional | 2.2% | 2.2% | Sep 2025 |
Baillie Gifford & Co. Global growth-focused asset manager with roughly 8.2 million CoStar Group shares (about 1.9%) as of September 30, 2025. | Institutional | 1.9% | 1.9% | Sep 2025 |
Massachusetts Financial Services Company (MFS) Institutional asset manager holding about 7.4 million CoStar Group shares (around 1.8%) as of September 30, 2025. | Institutional | 1.8% | 1.8% | Sep 2025 |
Andrew C. Florance Founder, President, and CEO of CoStar Group; directly and indirectly owns an estimated 0.37% of the company’s shares based on recent disclosures and governance data. | Founder | 0.4% | 0.4% | Dec 2024 |
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