According to SEC filings for the period ending December 2025, Costar Group, Inc. (NASDAQ:CSGP) is held by 188 institutional firms.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 30 Sep, 2025 | 70,056,441 | 1,208,958 | 1.76% | $5,910,661,927.00 |
| BlackRock, Inc. | 30 Sep, 2025 | 36,133,158 | 1,093,724 | 3.12% | $3,048,554,548.00 |
| BAMCO INC /NY/ | 30 Sep, 2025 | 19,255,566 | -424,369 | -2.16% | $1,624,592,103.00 |
| PRINCIPAL FINANCIAL GROUP INC | 30 Sep, 2025 | 18,623,370 | -23,279 | -0.12% | $1,571,258,065.00 |
| STATE STREET CORP | 30 Sep, 2025 | 18,284,128 | 551,160 | 3.11% | $1,542,631,879.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 30 Sep, 2025 | 12,601,455 | 243,615 | 1.97% | $1,059,385,861.00 |
| AKRE CAPITAL MANAGEMENT LLC | 30 Sep, 2025 | 9,306,485 | -2,747 | -0.03% | $785,188,139.00 |
| MORGAN STANLEY | 30 Sep, 2025 | 8,543,024 | 1,131,496 | 15.27% | $720,775,058.00 |
| BAILLIE GIFFORD & CO | 30 Sep, 2025 | 8,241,642 | -298,727 | -3.50% | $695,347,335.00 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 30 Sep, 2025 | 7,406,788 | 821,111 | 12.47% | $624,910,703.00 |
| Capital International Investors | 30 Sep, 2025 | 6,788,554 | -8,030,862 | -54.19% | $572,749,424.00 |
| POLEN CAPITAL MANAGEMENT LLC | 30 Sep, 2025 | 6,380,909 | -542,919 | -7.84% | $538,357,326.00 |
| JANUS HENDERSON GROUP PLC | 30 Sep, 2025 | 6,216,807 | 2,180,980 | 54.04% | $524,510,723.00 |
| MIZUHO MARKETS AMERICAS LLC | 30 Sep, 2025 | 5,123,216 | -734,126 | -12.53% | $432,245,734.00 |
| Capital Research Global Investors | 30 Sep, 2025 | 4,993,854 | 1,062,452 | 27.02% | $421,329,696.00 |
| UBS Group AG | 30 Sep, 2025 | 4,607,937 | -99,997 | -2.12% | $388,771,644.00 |
| Invesco Ltd. | 30 Sep, 2025 | 4,537,343 | 98,879 | 2.23% | $382,815,628.00 |
| Bank of New York Mellon Corp | 30 Sep, 2025 | 4,363,371 | -481,294 | -9.93% | $368,137,633.00 |
| MACQUARIE GROUP LTD | 30 Sep, 2025 | 4,267,156 | -567,455 | -11.74% | $360,020,405.00 |
| Vulcan Value Partners, LLC | 30 Sep, 2025 | 3,831,609 | 115,125 | 3.10% | $323,203,808.00 |