Costar Group, Inc.
CSGP- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0001057352
In the last 90 days, Costar Group, Inc. insiders filed 1 open-market purchase and 2 sales; 760 institutions reported holding it in 13F filings for Q2 2026, worth $11.7B in total; superinvestors Akre Capital Management and Weitz Investment Management hold it.
13F holders, Q3 2025
Institutional positions in Costar Group, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 905
- +46 vs. Q2 2025
- Shares held
- 413.6M
- −5.67M (−1.4%) vs. Q2 2025
- Total value
- $34.9B
- +$1.15B (+3.4%) vs. Q2 2025
- New holders
- 107
- 364 more added
- Sold out
- 61
- 314 more reduced
14 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CSGP on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 760 | $11.7B |
| Q1 2026 | 797 | $16.8B |
| Q4 2025 | 847 | $28.4B |
| Q3 2025 | 905 | $34.9B |
| Q2 2025 | 873 | $34.2B |
| Q1 2025 | 858 | $33.9B |
| Q4 2024 | 805 | $28.9B |
| Q3 2024 | 773 | $30.0B |
| Q2 2024 | 767 | $29.3B |
| Q1 2024 | 767 | $38.4B |
| Q4 2023 | 737 | $34.4B |
| Q3 2023 | 690 | $30.1B |
| Q2 2023 | 714 | $35.5B |
| Q1 2023 | 692 | $26.7B |
| Q4 2022 | 704 | $30.4B |
| Q3 2022 | 634 | $28.0B |
| Q2 2022 | 591 | $23.0B |
| Q1 2022 | 589 | $25.2B |
| Q4 2021 | 633 | $29.6B |
| Q3 2021 | 594 | $32.3B |
| Q2 2021 | 607 | $31.1B |
| Q1 2021 | 593 | $31.2B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| No Street GP LP | 450,000 | $38.0M | 2.52% | +20,000+4.7% | Added |
| Arrowstreet Capital, Limited Partnership | 453,897 | $38.3M | 0.02% | −105,049−18.8% | Reduced |
| TD Asset Management Inc | 455,430 | $38.4M | 0.03% | −226,787−33.2% | Reduced |
| Alliancebernstein L.P. | 464,823 | $39.2M | 0.01% | +4,152+0.9% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 466,278 | $39.3M | 0.09% | −10,397−2.2% | Reduced |
| Bank of Montreal | 469,680 | $39.6M | 0.02% | +49,554+11.8% | Added |
| Russell Investments Group, Ltd. | 475,423 | $40.1M | 0.05% | +28,432+6.4% | Added |
| Frontier Capital Management Co LLC | 490,623 | $41.4M | 0.37% | −36,855−7.0% | Reduced |
| ThornTree Capital Partners LP | 510,201 | $43.0M | 6.59% | −2,306−0.4% | Reduced |
| Ion Asset Management Ltd. | 534,000 | $45.1M | 5.50% | −635,833−54.4% | Reduced |
| ProShare Advisors LLC | 547,465 | $46.2M | 0.10% | −113,968−17.2% | Reduced |
| Telemark Asset Management, LLC | 550,000 | $46.4M | 4.40% | 00.0% | Unchanged |
| American Century Companies Inc | 551,523 | $46.5M | 0.02% | +481,024+682.3% | Added |
| National Pension Service | 553,599 | $46.7M | 0.04% | +11,998+2.2% | Added |
| Natixis Advisors, L.P. | 571,265 | $48.2M | 0.07% | +33,599+6.2% | Added |
| Canada Pension Plan Investment Board | 634,330 | $53.5M | 0.04% | +99,832+18.7% | Added |
| Marshall Wace, LLP | 635,944 | $53.7M | 0.06% | +509,246+401.9% | Added |
| Parnassus Investments | 636,974 | $53.7M | 0.12% | −18,424−2.8% | Reduced |
| Douglas Lane & Associates, LLC | 654,782 | $55.2M | 0.77% | +70,471+12.1% | Added |
| SEI Investments Co | 671,686 | $56.7M | 0.06% | +17,039+2.6% | Added |
| BNP Paribas Arbitrage, SA | 671,869 | $56.7M | 0.04% | −607,401−47.5% | Reduced |
| Citigroup Inc | 672,749 | $56.8M | 0.04% | −159,938−19.2% | Reduced |
| First Trust Advisors LP | 674,750 | $56.9M | 0.04% | +58,212+9.4% | Added |
| Ci Investments Inc. | 680,839 | $57.4M | 0.21% | −27,614−3.9% | Reduced |
| California State Teachers Retirement System | 696,243 | $58.7M | 0.06% | −2,066−0.3% | Reduced |
| Ensign Peak Advisors, Inc | 698,001 | $58.9M | 0.10% | −73,377−9.5% | Reduced |
| Baird Financial Group, Inc. | 707,544 | $59.7M | 0.10% | −213,224−23.2% | Reduced |
| HSBC Holdings PLC | 717,320 | $60.4M | 0.04% | +8,932+1.3% | Added |
| Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management | 719,850 | $60.7M | 3.30% | −45,750−6.0% | Reduced |
| California Public Employees Retirement System | 730,562 | $61.6M | 0.04% | +43,644+6.4% | Added |
| Kayne Anderson Rudnick Investment Management LLC | 741,641 | $62.6M | 0.15% | −41,045−5.2% | Reduced |
| Peregrine Capital Management LLC | 760,836 | $64.2M | 1.93% | +60,293+8.6% | Added |
| Stephens Investment Management Group LLC | 766,512 | $64.7M | 0.84% | −6,769−0.9% | Reduced |
| Raymond James Financial Inc | 769,369 | $64.9M | 0.02% | +107,492+16.2% | Added |
| Rhumbline Advisers | 789,863 | $66.6M | 0.05% | +7,695+1.0% | Added |
| American Capital Management Inc | 793,664 | $67.0M | 2.67% | −2,297−0.3% | Reduced |
| TimesSquare Capital Management, LLC | 806,531 | $68.0M | 0.97% | −3,665−0.5% | Reduced |
| Pictet Asset Management Holding SA | 848,792 | $71.6M | 0.07% | −66,283−7.2% | Reduced |
| ShawSpring Partners LLC | 896,034 | $75.6M | 11.24% | −460,026−33.9% | Reduced |
| D. E. Shaw & Co., Inc. | 905,488 | $76.4M | 0.06% | −10,900−1.2% | Reduced |
| Chicago Capital, LLC | 960,042 | $81.0M | 1.99% | −4,248−0.4% | Reduced |
| Colony Group, LLC | 997,953 | $84.2M | 0.14% | +7,416+0.7% | Added |
| Spyglass Capital Management LLC | 1,002,717 | $84.6M | 4.51% | +199,435+24.8% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,007,527 | $85.0M | 0.06% | +81,507+8.8% | Added |
| Harding Loevner LP | 1,083,322 | $91.4M | 0.67% | −383,758−26.2% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,096,701 | $92.5M | 0.05% | +75,401+7.4% | Added |
| Wells Fargo & Company | 1,136,954 | $95.9M | 0.02% | −194,208−14.6% | Reduced |
| Swiss National Bank | 1,216,165 | $102.6M | 0.06% | −60,600−4.7% | Reduced |
| Ameriprise Financial Inc | 1,222,534 | $103.1M | 0.02% | +144,789+13.4% | Added |
| Bares Capital Management, Inc. | 1,226,251 | $103.5M | 9.54% | +11,599+1.0% | Added |
| Price T Rowe Associates Inc | 1,264,162 | $106.7M | 0.01% | +68,830+5.8% | Added |
| Barclays PLC | 1,266,116 | $106.8M | 0.04% | +94,810+8.1% | Added |
| Royal Bank of Canada | 1,276,840 | $107.7M | 0.02% | +2,036+0.2% | Added |
| Kensico Capital Management Corp | 1,282,400 | $108.2M | 1.67% | 00.0% | Unchanged |
| Deutsche Bank AG | 1,282,786 | $108.2M | 0.04% | −243,016−15.9% | Reduced |
| Federated Hermes, Inc. | 1,463,345 | $123.5M | 0.22% | −6,999−0.5% | Reduced |
| FMR LLC | 1,580,154 | $133.3M | 0.01% | +284,277+21.9% | Added |
| Mackenzie Financial Corp | 1,645,936 | $138.9M | 0.17% | −217,789−11.7% | Reduced |
| Riverbridge Partners LLC | 1,659,183 | $140.0M | 2.36% | −94,835−5.4% | Reduced |
| Envestnet Asset Management Inc | 1,709,175 | $144.2M | 0.04% | −30,088−1.7% | Reduced |
| Beck Mack & Oliver LLC | 1,723,432 | $145.4M | 2.64% | −3,214−0.2% | Reduced |
| Citadel Advisors LLC | 1,726,618 | $145.7M | 0.12% | +1,695,175+5,391.3% | Added |
| CIBC Private Wealth Group, LLC | 1,823,106 | $153.8M | 0.26% | −13,189−0.7% | Reduced |
| Voya Investment Management LLC | 1,846,286 | $155.8M | 0.16% | +614,515+49.9% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,849,729 | $156.1M | 0.41% | −1,368,839−42.5% | Reduced |
| JPMorgan Chase & Co | 1,916,865 | $161.7M | 0.01% | −373,986−16.3% | Reduced |
| RGM Capital, LLC | 2,092,703 | $176.6M | 7.43% | −30,000−1.4% | Reduced |
| Fayez Sarofim & Co | 2,174,799 | $183.5M | 0.43% | +17,666+0.8% | Added |
| DF Dent & Co Inc | 2,177,724 | $183.7M | 2.37% | −92,646−4.1% | Reduced |
| Goldman Sachs Group Inc | 2,195,212 | $185.2M | 0.03% | +12,031+0.6% | Added |
| Dimensional Fund Advisors LP | 2,236,180 | $188.7M | 0.04% | +67,262+3.1% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,437,206 | $205.6M | 0.53% | +172,176+7.6% | Added |
| UBS Asset Management Americas Inc | 2,459,610 | $207.5M | 0.05% | −522,088−17.5% | Reduced |
| Brown Advisory Inc | 2,464,724 | $207.9M | 0.27% | −211,270−7.9% | Reduced |
| Charles Schwab Investment Management Inc | 2,656,604 | $224.1M | 0.04% | −435,519−14.1% | Reduced |
| Legal & General Group Plc | 2,699,757 | $227.8M | 0.05% | +195,200+7.8% | Added |
| Amundi | 3,135,136 | $254.4M | 0.08% | −63,439−2.0% | Reduced |
| Third Point LLCSuperinvestorThird Point | 3,017,000 | $254.5M | 3.04% | −68,000−2.2% | Reduced |
| Blair William & Co | 3,128,473 | $263.9M | 0.70% | +257,311+9.0% | Added |
| Tiger Global Management LLCSuperinvestorTiger Global Management | 3,245,109 | $273.8M | 0.85% | 00.0% | Unchanged |
| Nuveen, LLC | 3,506,625 | $295.9M | 0.08% | +2,424,722+224.1% | Added |
| T. Rowe Price Investment Management, Inc. | 3,510,524 | $296.2M | 0.18% | −2,983,613−45.9% | Reduced |
| Bank of America Corp | 3,696,857 | $311.9M | 0.02% | −1,429,746−27.9% | Reduced |
| Franklin Resources Inc | 3,736,949 | $315.3M | 0.08% | +297,045+8.6% | Added |
| Northern Trust Corp | 3,752,394 | $316.6M | 0.04% | −113,838−2.9% | Reduced |
| Vulcan Value Partners, LLC | 3,831,609 | $323.2M | 5.86% | +115,125+3.1% | Added |
| Macquarie Group Ltd | 4,267,156 | $360.0M | 0.42% | −567,455−11.7% | Reduced |
| Bank of New York Mellon Corp | 4,363,371 | $368.1M | 0.07% | −481,294−9.9% | Reduced |
| Invesco Ltd. | 4,537,343 | $382.8M | 0.06% | +98,879+2.2% | Added |
| UBS Group AG | 4,607,937 | $388.8M | 0.08% | −99,997−2.1% | Reduced |
| Capital Research Global Investors | 4,993,854 | $421.3M | 0.08% | +1,062,452+27.0% | Added |
| Mizuho Markets Americas LLC | 5,123,216 | $432.2M | 9.11% | −734,126−12.5% | Reduced |
| Janus Henderson Group PLC | 6,216,807 | $524.5M | 0.24% | +2,180,980+54.0% | Added |
| Polen Capital Management LLC | 6,380,909 | $538.4M | 1.75% | −542,919−7.8% | Reduced |
| Capital International Investors | 6,788,554 | $572.7M | 0.09% | −8,030,862−54.2% | Reduced |
| Massachusetts Financial Services Co | 7,406,788 | $624.9M | 0.19% | +821,111+12.5% | Added |
| Baillie Gifford & Co | 8,241,642 | $695.3M | 0.52% | −298,727−3.5% | Reduced |
| Morgan Stanley | 8,543,024 | $720.8M | 0.04% | +1,131,496+15.3% | Added |
| Akre Capital Management LLCSuperinvestorAkre Capital Management | 9,306,485 | $785.2M | 7.83% | −2,7470.0% | Reduced |
| Geode Capital Management, LLC | 12,601,455 | $1.06B | 0.07% | +243,615+2.0% | Added |