COSTAR GROUP INC (CSGP)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
715
Reporting holders
$11.8B
Reported value
101.5%
Of shares outstanding
1.0%
Held as options
-37
Holder change
Institutions report 411,310,999 shares against 405,197,588 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | $1.1B | 37,914,844 | 0.05% | 2q | -0.8%-$9.0M |
| BlackRock, Inc. | $957.6M | 33,813,969 | 0.01% | 8q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $755.7M | 26,683,792 | 0.02% | 2q | -2.7%-$21.0M |
| BAMCO INC /NY/ | $612.5M | 21,626,763 | 0.92% | 31q | +32.6%+$150.5M |
| STATE STREET CORP | $521.4M | 18,410,876 | 0.02% | 31q | -1.3%-$6.8M |
| Capital International Investors | $471.3M | 16,643,016 | 0.10% | 18q | +7.3%+$32.0M |
| BAILLIE GIFFORD & CO | $372.5M | 13,154,165 | 0.34% | 31q | -3.4%-$12.9M |
| GEODE CAPITAL MANAGEMENT, LLC | $343.3M | 12,166,469 | 0.02% | 31q | -2.3%-$8.0M |
| AKRE CAPITAL MANAGEMENT LLC | $331.3M | 11,699,396 | 6.47% | 27q | +13.1%+$38.3M |
| POLEN CAPITAL MANAGEMENT LLC | $248.1M | 8,759,314 | 2.14% | 7q | -30.3%-$107.9M |
| AQR CAPITAL MANAGEMENT LLC | $239.2M | 8,445,474 | 0.08% | 31q | +568.8%+$203.4M |
| Jupiter Topco LLC | $221.8M | 7,832,860 | 0.09% | new | FIRST |
| Invesco Ltd. | $192.8M | 6,808,377 | 0.02% | 31q | -57.3%-$258.8M |
| EdgePoint Investment Group Inc. | $168.5M | 5,950,002 | 1.27% | new | NEW |
| NORGES BANK | $168.5M | 5,949,912 | 0.02% | 32q | -16.1%-$32.3M |
| MORGAN STANLEY | $155.4M | 5,485,870 | 0.01% | 35q | +1.4%+$2.1M |
| Meritage Group LP | $152.8M | 5,394,164 | 5.89% | 2q | +62.0%+$58.5M |
| JPMORGAN CHASE & CO | $146.7M | 4,939,994 | 0.01% | 31q | +167.1%+$91.8M |
| GOLDMAN SACHS GROUP INC | $145.3M | 5,129,484 | 0.01% | 31q | -44.5%-$116.6M |
| FEDERATED HERMES, INC. | $125.4M | 4,426,727 | 0.18% | 31q | +241.1%+$88.6M |
| Capital Research Global Investors | $118.8M | 4,193,733 | 0.02% | 15q | -4.1%-$5.1M |
| PRINCIPAL FINANCIAL GROUP INC | $107.4M | 3,790,794 | 0.05% | 31q | -78.6%-$393.8M |
| NORTHERN TRUST CORP | $97.7M | 3,448,839 | 0.01% | 31q | HELD |
| Qube Research & Technologies Ltd | $91.1M | 3,218,369 | 0.08% | new | NEW |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $88.9M | 3,136,727 | 0.09% | 31q | +17.2%+$13.1M |
| Amundi | $88.8M | 3,135,933 | 0.02% | 21q | -4.4%-$4.1M |
| VAN ECK ASSOCIATES CORP | $87.2M | 3,078,903 | 0.05% | 9q | -11.5%-$11.3M |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $84.5M | 2,983,969 | 0.03% | 31q | +212.1%+$57.4M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $83.9M | 2,962,442 | 0.01% | 31q | +3.1%+$2.5M |
| Sixth Street Partners Management Company, L.P. | $83.9M | 2,962,442 | 0.01% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $77.5M | 2,735,102 | 0.00% | 31q | -23.3%-$23.6M |
| Spyglass Capital Management LLC | $76.3M | 2,694,697 | 4.13% | 11q | +142.5%+$44.8M |
| JANE STREET GROUP, LLC | $73.2M | 2,162,322 | 0.01% | 25q | +98.8%+$36.4M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $71.4M | 2,521,571 | 0.01% | 31q | +4.0%+$2.7M |
| CANADA PENSION PLAN INVESTMENT BOARD | $70.3M | 2,481,641 | 0.04% | 31q | +23.4%+$13.3M |
| FMR LLC | $70.1M | 2,474,902 | 0.00% | 31q | -12.6%-$10.1M |
| UBS Group AG | $68.1M | 2,328,376 | 0.01% | 31q | +75.6%+$29.3M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $68.1M | 2,403,003 | 0.10% | 3q | +3.0%+$2.0M |
| Ensign Peak Advisors, Inc | $67.2M | 2,373,407 | 0.11% | 27q | -56.6%-$87.7M |
| VANGUARD FIDUCIARY TRUST CO | $65.1M | 2,297,974 | 0.01% | 2q | -3.9%-$2.6M |
| DEUTSCHE BANK AG\ | $64.1M | 2,264,379 | 0.02% | 34q | +19.2%+$10.3M |
| BANK OF MONTREAL /CAN/ | $63.4M | 2,209,141 | 0.02% | 31q | -11.2%-$8.0M |
| BECK MACK & OLIVER LLC | $59.0M | 2,084,233 | 1.15% | 18q | -28.8%-$23.9M |
| Bank of New York Mellon Corp | $56.8M | 2,005,395 | 0.01% | 31q | -16.5%-$11.2M |
| Erste Asset Management GmbH | $49.8M | 1,700,000 | 0.39% | 31q | +277.8%+$36.6M |
| Legal & General Group Plc | $47.7M | 1,682,774 | 0.01% | 31q | -44.4%-$38.0M |
| BNP PARIBAS FINANCIAL MARKETS | $44.7M | 1,578,322 | 0.02% | 31q | +105.3%+$22.9M |
| HSBC HOLDINGS PLC | $44.6M | 1,570,774 | 0.02% | 31q | +16.6%+$6.4M |
| Fiera Capital Corp | $44.4M | 1,566,845 | 0.16% | 14q | +225.3%+$30.7M |
| Squarepoint Ops LLC | $44.3M | 1,442,049 | 0.05% | 15q | +84.3%+$20.3M |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | $43.7M | 1,543,483 | 0.19% | 2q | +16.1%+$6.0M |
| ENVESTNET ASSET MANAGEMENT INC | $43.5M | 1,535,584 | 0.01% | 31q | -14.8%-$7.6M |
| DIMENSIONAL FUND ADVISORS LP | $42.9M | 1,515,376 | 0.01% | 31q | -36.9%-$25.1M |
| Pictet Asset Management Holding SA | $41.7M | 1,470,824 | 0.04% | 12q | +7.2%+$2.8M |
| ROYAL BANK OF CANADA | $41.5M | 1,467,115 | 0.01% | 31q | +2.2%+$888.8K |
| MARSHALL WACE, LLP | $39.1M | 1,381,204 | 0.03% | 5q | +167.0%+$24.5M |
| Nuveen, LLC | $37.5M | 1,325,564 | 0.01% | 6q | -31.3%-$17.1M |
| DF DENT & CO INC | $37.4M | 1,319,009 | 0.71% | 31q | -17.8%-$8.1M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $36.8M | 1,299,558 | 0.02% | 2q | +3076.5%+$35.6M |
| WELLS FARGO & COMPANY/MN | $35.5M | 1,253,821 | 0.01% | 31q | -55.3%-$43.9M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $35.2M | 405,498 | 0.00% | 31q | +59.4%+$13.1M |
| CITADEL ADVISORS LLC | $35.1M | 741,898 | 0.00% | 31q | -31.8%-$16.4M |
| TWO SIGMA INVESTMENTS, LP | $34.0M | 1,104,950 | 0.02% | 5q | +264.7%+$24.7M |
| Swiss National Bank | $33.5M | 1,183,765 | 0.02% | 31q | -4.8%-$1.7M |
| Connor, Clark & Lunn Investment Management Ltd. | $33.1M | 1,169,688 | 0.06% | 2q | +986.3%+$30.1M |
| Douglas Lane & Associates, LLC | $33.1M | 1,168,859 | 0.45% | 7q | +45.4%+$10.3M |
| RIVERBRIDGE PARTNERS LLC | $30.9M | 1,091,535 | 0.86% | 31q | -11.1%-$3.8M |
| D. E. Shaw & Co., Inc. | $29.5M | 1,043,332 | 0.01% | 31q | -82.3%-$137.8M |
| Mitsubishi UFJ Asset Management Co., Ltd. | $28.8M | 1,015,380 | 0.02% | 31q | -3.5%-$1.0M |
| CAPITAL FUND MANAGEMENT S.A. | $28.3M | 902,723 | 0.12% | 4q | +1847.5%+$26.8M |
| CITIGROUP INC | $27.2M | 889,581 | 0.01% | 31q | -6.7%-$2.0M |
| Focus Partners Wealth | $26.5M | 936,775 | 0.03% | 7q | +1.6%+$415.1K |
| Sumitomo Mitsui Trust Group, Inc. | $26.2M | 925,120 | 0.01% | 31q | -3.0%-$820.0K |
| Man Group plc | $26.1M | 921,094 | 0.04% | 13q | +1323.0%+$24.3M |
| Vanguard Global Advisers, LLC | $24.9M | 881,001 | 0.01% | 2q | -5.1%-$1.3M |
| MILLENNIUM MANAGEMENT LLC | $24.7M | 746,995 | 0.01% | 15q | +504.4%+$20.6M |
| PRIMECAP MANAGEMENT CO/CA/ | $23.3M | 821,600 | 0.01% | 6q | +2.2%+$509.8K |
| RHUMBLINE ADVISERS | $22.4M | 790,116 | 0.02% | 31q | HELD |
| VANGUARD ASSET MANAGEMENT, Ltd | $21.9M | 772,828 | 0.01% | 2q | +7.7%+$1.6M |
| Russell Investments Group, Ltd. | $21.6M | 762,930 | 0.02% | 31q | +118.1%+$11.7M |
| TUDOR INVESTMENT CORP ET AL | $21.5M | 627,490 | 0.03% | 9q | +250.0%+$15.4M |
| BARCLAYS PLC | $21.5M | 758,649 | 0.00% | 31q | -38.4%-$13.4M |
| Petrus Trust Company, LTA | $21.4M | 756,200 | 2.01% | 6q | HELD |
| Trexquant Investment LP | $21.0M | 740,241 | 0.12% | 2q | +913.1%+$18.9M |
| AMERICAN CAPITAL MANAGEMENT INC | $20.5M | 725,143 | 0.92% | 31q | -12.1%-$2.8M |
| Korea Investment CORP | $19.8M | 698,417 | 0.04% | 31q | +279.8%+$14.6M |
| PEREGRINE CAPITAL MANAGEMENT LLC | $19.6M | 692,753 | 0.64% | 31q | -0.9%-$181.2K |
| BLAIR WILLIAM & CO/IL | $18.6M | 658,159 | 0.05% | 31q | -26.9%-$6.9M |
| ALLIANCEBERNSTEIN L.P. | $18.5M | 458,488 | 0.01% | 31q | +12.5%+$2.1M |
| Gotham Asset Management, LLC | $18.0M | 635,988 | 0.04% | 5q | +42.3%+$5.4M |
| Mitsubishi UFJ Trust & Banking Corp | $16.9M | 596,676 | 0.04% | 31q | +40.9%+$4.9M |
| Quantinno Capital Management LP | $16.4M | 577,996 | 0.02% | 17q | +69.9%+$6.7M |
| LANDMARK INVESTMENT PARTNERS, L.P. | $15.7M | 144,011 | 3.93% | 2q | +20.0%+$2.6M |
| Chicago Capital, LLC | $14.9M | 526,958 | 0.36% | 31q | -50.1%-$15.0M |
| United Asset Strategies, Inc. | $13.8M | 489,008 | 0.98% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $13.8M | 487,676 | 0.02% | 31q | +137.5%+$8.0M |
| California Public Employees Retirement System | $13.5M | 478,042 | 0.01% | 31q | -10.3%-$1.5M |
| NZS Capital, LLC | $13.5M | 475,551 | 0.35% | 19q | -33.0%-$6.6M |
| ExodusPoint Capital Management, LP | $13.0M | 458,765 | 0.08% | 3q | +1773.8%+$12.3M |
| FORA Capital, LLC | $12.6M | 443,586 | 0.86% | 2q | +76.0%+$5.4M |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G | Baron Capital Group, Inc.with 3 co-filers | 5.3% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 715 | $11.8B | 411,310,999 | 106 | 280 | 243 | 1.0% |
| Q1 2026 | 752 | $16.8B | 412,623,206 | 114 | 289 | 242 | 1.1% |
| Q4 2025 | 806 | $27.8B | 409,149,075 | 62 | 238 | 357 | 1.2% |
| Q3 2025 | 847 | $34.4B | 404,737,955 | 90 | 321 | 262 | 0.8% |
| Q2 2025 | 821 | $33.4B | 411,545,159 | 89 | 308 | 286 | 0.8% |
| Q1 2025 | 795 | $33.3B | 415,279,468 | 120 | 329 | 233 | 1.3% |
| Q4 2024 | 744 | $28.4B | 394,590,066 | 99 | 255 | 239 | 0.6% |
| Q3 2024 | 709 | $29.3B | 386,540,073 | 79 | 260 | 245 | 0.5% |
| Q2 2024 | 692 | $28.3B | 379,756,858 | 82 | 232 | 235 | 0.5% |
| Q1 2024 | 690 | $38.7B | 399,143,808 | 77 | 240 | 222 | 0.5% |
| Q4 2023 | 663 | $33.2B | 378,868,838 | 64 | 238 | 215 | 0.4% |
| Q3 2023 | 610 | $28.8B | 372,963,065 | 48 | 228 | 195 | 0.4% |
| Q2 2023 | 633 | $33.8B | 378,370,409 | 80 | 219 | 206 | 0.5% |
| Q1 2023 | 593 | $25.2B | 365,309,697 | 66 | 193 | 210 | 0.2% |
| Q4 2022 | 567 | $26.3B | 339,261,692 | 91 | 204 | 163 | 0.5% |
| Q3 2022 | 639 | $29.2B | 416,506,590 | 104 | 221 | 187 | 0.6% |
| Q2 2022 | 593 | $23.3B | 382,814,022 | 77 | 203 | 198 | 0.4% |
| Q1 2022 | 588 | $25.3B | 378,398,897 | 63 | 238 | 190 | 0.4% |
| Q4 2021 | 628 | $30.3B | 382,601,709 | 73 | 210 | 191 | 0.3% |
| Q3 2021 | 597 | $32.4B | 375,201,267 | 61 | 214 | 184 | 0.5% |
| Q2 2021 | 608 | $31.3B | 375,318,007 | 78 | 513 | 6 | 0.7% |
| Q1 2021 | 597 | $31.4B | 37,952,995 | 67 | 219 | 196 | 0.7% |
| Q4 2020 | 612 | $36.0B | 38,643,399 | 61 | 235 | 179 | 0.5% |
| Q3 2020 | 575 | $32.3B | 37,821,941 | 81 | 185 | 199 | 0.7% |
| Q2 2020 | 546 | $27.1B | 37,817,992 | 83 | 201 | 174 | 1.0% |
| Q1 2020 | 503 | $21.0B | 35,552,862 | 60 | 174 | 196 | 0.7% |
| Q4 2019 | 489 | $21.3B | 35,333,550 | 50 | 165 | 170 | 0.7% |
| Q3 2019 | 481 | $20.7B | 34,843,398 | 72 | 154 | 179 | 0.2% |
| Q2 2019 | 444 | $19.6B | 35,202,226 | 66 | 173 | 139 | 0.4% |
| Q1 2019 | 436 | $16.7B | 35,676,373 | 81 | 137 | 140 | 0.2% |
| Q4 2018 | 385 | $12.1B | 35,749,501 | 4 | 9 | 7 | 0.2% |