CoStar Group (CSGP)
Connects proprietary real estate data with analytics, marketplaces, and digital-twin tools.
$29.03
vs last close−0.01 (−0.03%)
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13F · 13D/G · Form 4
| Institutions | ≥ 94.32% | 382.20M shares | |
|---|---|---|---|
| 795 holders · as of Jun 30, 2026 · largest filers only | |||
| Insiders | 1.31% | 5.30M shares | |
| 18 holders · as of Aug 10, 2026 | |||
| Other | ≤ 4.37% | 17.69M shares | |
| remainder | |||
405.20M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the 99 largest filers, so at least this.
13F, as of Jun 30, 2026
795 holders · 382.20M shares · 117 new positions · 421 increased · 268 reduced · 154 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Vanguard Portfolio Management LLC | 37.91M | 9.36% | −319.3K | Aug 13, 2026 |
| BlackRock, Inc. | 33.81M | 8.35% | +5.8K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 26.68M | 6.59% | −740.1K | Aug 13, 2026 |
| Bamco Inc /NY/ | 21.63M | 5.34% | +5.31M | Aug 14, 2026 |
| State Street Corp | 18.41M | 4.54% | −240.1K | Aug 7, 2026 |
| Capital International Investors | 16.64M | 4.11% | +1.13M | Aug 12, 2026 |
| Baillie Gifford & Co | 13.15M | 3.25% | −456.8K | Aug 6, 2026 |
| Geode Capital Management, LLC | 12.17M | 3.00% | −282.2K | Aug 12, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Vanguard Portfolio Management | 9.12% | 38.29M | 13G | Apr 29, 2026 |
| Vanguard Capital Management | 7.53% | 31.61M | 13G | Apr 29, 2026 |
| BlackRock, Inc. | 7.50% | 31.82M | 13G | Apr 23, 2025 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 5, 2026 | John W. Hilldirector | Sale | 3,500 | $30.21 | 22,993 |
| Aug 7, 2026 | Cynthia Cammett Cannofficer: Chief Accounting Officer | Sale | 4,788 | $30.78 | 18,822 |
| Aug 4, 2026 | Andrew C. Florancedirector, officer: Founder and CEO | Purchase | 83,300 | $29.89 | 1,806,165 |
| May 1, 2026 | Andrew C. Florancedirector, officer: President and CEO | Purchase · 2 lots | 71,430 | $35.20 | 1,722,865 |
| Mar 6, 2026 | Louise S. Samsdirector | Purchase | 1,000 | $48.36 | 20,409 |
| Mar 2, 2026 | Frederick G. Saintofficer: President, Marketplaces | Purchase | 20,000 | $45.33 | 279,851 |
| Mar 2, 2026 | Rachel C. Glaserdirector | Purchase | 1,000 | $44.94 | 4,157 |
| Feb 27, 2026 | Andrew C. Florancedirector, officer: President and CEO | Purchase | 55,720 | $44.52 | 1,586,866 |
| Nov 13, 2025 | Cynthia Cammett Cannofficer: Chief Accounting Officer | Sale | 1,841 | $68.79 | 23,211 |
| Nov 13, 2025 | John W. Hilldirector | Sale | 2,250 | $68.68 | 18,231 |
House and Senate disclosures
| Member | Type | Amount | Owner | Traded | Disclosed |
|---|---|---|---|---|---|
| Rep. Gilbert Cisneros · CA31 | Purchase | $1,001 – $15,000 | Aug 19, 2026 | Sep 11, 2026 | |
| Rep. Gilbert Cisneros · CA31 | Sale | $1,001 – $15,000 | Apr 14, 2026 | May 11, 2026 | |
| Rep. Gilbert Cisneros · CA31 | Purchase | $1,001 – $15,000 | Mar 13, 2026 | Apr 8, 2026 |