Costar Group, Inc.
CSGP- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0001057352
No open-market purchases or sales by Costar Group, Inc. insiders were filed in the last 90 days; 764 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, Q4 2025
Institutional positions in Costar Group, Inc. as of Dec 31, 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
- 851
- −40 vs. Q3 2025
- Shares held
- 422.7M
- +11.7M (+2.8%) vs. Q3 2025
- Total value
- $28.4B
- −$6.23B (−18.0%) vs. Q3 2025
- New holders
- 104
- 274 more added
- Sold out
- 144
- 389 more reduced
18 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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 | 764 | $11.7B |
| Q1 2026 | 801 | $16.8B |
| Q4 2025 | 851 | $28.4B |
| Q3 2025 | 909 | $34.9B |
| Q2 2025 | 876 | $34.2B |
| Q1 2025 | 861 | $33.9B |
| Q4 2024 | 808 | $28.9B |
| Q3 2024 | 775 | $30.0B |
| Q2 2024 | 768 | $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, Q4 2025
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 70,108,999 | $4.71B | 0.07% | +52,558+0.1% | Added |
| BlackRock, Inc. | 33,970,626 | $2.28B | 0.04% | −2,162,532−6.0% | Reduced |
| Bamco Inc | 19,498,099 | $1.31B | 3.55% | +242,533+1.3% | Added |
| State Street Corp | 18,632,352 | $1.25B | 0.04% | +348,224+1.9% | Added |
| Principal Financial Group Inc | 17,566,074 | $1.18B | 0.60% | −1,057,296−5.7% | Reduced |
| Invesco Ltd. | 14,908,741 | $1.00B | 0.09% | +10,371,398+228.6% | Added |
| Baillie Gifford & Co | 12,933,185 | $869.6M | 0.72% | +4,691,543+56.9% | Added |
| Geode Capital Management, LLC | 12,182,167 | $816.2M | 0.05% | −419,288−3.3% | Reduced |
| Capital International Investors | 10,842,010 | $729.0M | 0.11% | +4,053,456+59.7% | Added |
| Akre Capital Management LLCSuperinvestorAkre Capital Management | 9,617,805 | $646.7M | 7.09% | +311,320+3.3% | Added |
| Janus Henderson Group PLC | 7,473,380 | $502.5M | 0.23% | +1,256,573+20.2% | Added |
| Norges Bank | 7,090,495 | $476.8M | 0.05% | +7,090,495 | New |
| Capital Research Global Investors | 5,566,962 | $374.3M | 0.07% | +573,108+11.5% | Added |
| Morgan Stanley | 5,291,136 | $355.8M | 0.02% | −3,251,888−38.1% | Reduced |
| Polen Capital Management LLC | 4,890,936 | $328.9M | 1.40% | −1,489,973−23.4% | Reduced |
| Vulcan Value Partners, LLC | 4,485,021 | $301.5M | 5.44% | +653,412+17.1% | Added |
| Mizuho Markets Americas LLC | 4,416,116 | $296.9M | 6.38% | −707,100−13.8% | Reduced |
| Amundi | 4,114,516 | $276.7M | 0.08% | +979,380+31.2% | Added |
| Bank of New York Mellon Corp | 4,113,002 | $276.6M | 0.05% | −250,369−5.7% | Reduced |
| Nomura Asset Management International Inc. | 3,909,161 | $262.9M | 0.40% | +3,909,161 | New |
| Goldman Sachs Group Inc | 3,751,528 | $252.3M | 0.04% | +1,556,316+70.9% | Added |
| Nuveen, LLC | 3,560,896 | $239.4M | 0.06% | +54,271+1.5% | Added |
| Bank of America Corp | 3,504,812 | $235.7M | 0.02% | −192,045−5.2% | Reduced |
| Northern Trust Corp | 3,466,062 | $233.1M | 0.03% | −286,332−7.6% | Reduced |
| T. Rowe Price Investment Management, Inc. | 3,464,794 | $233.0M | 0.15% | −45,730−1.3% | Reduced |
| Third Point LLCSuperinvestorThird Point | 3,165,000 | $212.8M | 2.93% | +148,000+4.9% | Added |
| Massachusetts Financial Services Co | 3,159,925 | $212.5M | 0.07% | −4,246,863−57.3% | Reduced |
| Legal & General Group Plc | 2,861,300 | $192.4M | 0.04% | +161,543+6.0% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,813,363 | $189.2M | 0.22% | +376,157+15.4% | Added |
| Charles Schwab Investment Management Inc | 2,663,099 | $179.1M | 0.03% | +6,495+0.2% | Added |
| UBS Asset Management Americas Inc | 2,432,817 | $163.6M | 0.03% | −26,793−1.1% | Reduced |
| Barclays PLC | 2,321,700 | $156.1M | 0.06% | +1,055,584+83.4% | Added |
| Dimensional Fund Advisors LP | 2,319,754 | $156.0M | 0.03% | +83,574+3.7% | Added |
| Tiger Global Management LLCSuperinvestorTiger Global Management | 2,259,109 | $151.9M | 0.51% | −986,000−30.4% | Reduced |
| Fayez Sarofim & Co | 2,241,437 | $150.7M | 0.36% | +66,638+3.1% | Added |
| Beck Mack & Oliver LLC | 2,224,889 | $149.6M | 2.72% | +501,457+29.1% | Added |
| UBS Group AG | 2,111,290 | $142.0M | 0.03% | −2,496,647−54.2% | Reduced |
| Blair William & Co | 2,023,523 | $136.1M | 0.37% | −1,104,950−35.3% | Reduced |
| DF Dent & Co Inc | 2,007,630 | $135.0M | 1.94% | −170,094−7.8% | Reduced |
| RGM Capital, LLC | 1,995,460 | $134.2M | 6.51% | −97,243−4.6% | Reduced |
| Brown Advisory Inc | 1,906,345 | $128.2M | 0.18% | −558,379−22.7% | Reduced |
| Jupiter Asset Management Ltd | 1,863,704 | $125.3M | 1.00% | +1,480,474+386.3% | Added |
| Deutsche Bank AG | 1,775,803 | $119.4M | 0.04% | +493,017+38.4% | Added |
| Mackenzie Financial Corp | 1,660,715 | $112.5M | 0.13% | +14,779+0.9% | Added |
| Tremblant Capital Group | 1,635,964 | $110.0M | 2.81% | +1,410,036+624.1% | Added |
| Spyglass Capital Management LLC | 1,578,449 | $106.1M | 5.31% | +575,732+57.4% | Added |
| Citigroup Inc | 1,502,021 | $101.0M | 0.07% | +829,272+123.3% | Added |
| Riverbridge Partners LLC | 1,452,546 | $97.7M | 1.83% | −206,637−12.5% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,442,582 | $97.0M | 0.26% | −407,147−22.0% | Reduced |
| CIBC Private Wealth Group, LLC | 1,361,651 | $91.6M | 0.15% | −461,455−25.3% | Reduced |
| Envestnet Asset Management Inc | 1,335,852 | $89.8M | 0.03% | −373,323−21.8% | Reduced |
| Federated Hermes, Inc. | 1,322,999 | $89.0M | 0.15% | −140,346−9.6% | Reduced |
| Royal Bank of Canada | 1,307,942 | $87.9M | 0.02% | +31,102+2.4% | Added |
| Nomura Holdings Inc | 1,234,117 | $83.0M | 0.24% | +1,222,867+10,869.9% | Added |
| FMR LLC | 1,202,153 | $80.8M | 0.00% | −378,001−23.9% | Reduced |
| Price T Rowe Associates Inc | 1,198,832 | $80.6M | 0.01% | −65,330−5.2% | Reduced |
| Capitolis Liquid Global Markets LLC | 1,184,000 | $79.6M | 0.47% | +1,184,000 | New |
| Franklin Resources Inc | 1,162,422 | $78.2M | 0.02% | −2,574,527−68.9% | Reduced |
| Swiss National Bank | 1,160,965 | $78.1M | 0.05% | −55,200−4.5% | Reduced |
| Stephens Investment Management Group LLC | 1,114,972 | $75.0M | 0.98% | +348,460+45.5% | Added |
| Pictet Asset Management Holding SA | 1,055,508 | $71.0M | 0.07% | +206,716+24.4% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,057,184 | $69.4M | 0.05% | +49,657+4.9% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 999,684 | $67.2M | 0.04% | −97,017−8.8% | Reduced |
| BNP Paribas Arbitrage, SA | 997,813 | $67.1M | 0.04% | +325,944+48.5% | Added |
| HSBC Holdings PLC | 987,270 | $66.4M | 0.04% | +269,950+37.6% | Added |
| ShawSpring Partners LLC | 957,557 | $64.4M | 12.12% | +61,523+6.9% | Added |
| Harding Loevner LP | 920,272 | $61.9M | 0.54% | −163,050−15.1% | Reduced |
| D. E. Shaw & Co., Inc. | 905,488 | $60.9M | 0.05% | 00.0% | Unchanged |
| Kensico Capital Management Corp | 901,600 | $60.6M | 1.03% | −380,800−29.7% | Reduced |
| Wells Fargo & Company | 880,972 | $59.2M | 0.01% | −255,982−22.5% | Reduced |
| Colony Group, LLC | 841,115 | $56.6M | 0.06% | −156,838−15.7% | Reduced |
| Chicago Capital, LLC | 827,123 | $55.6M | 1.37% | −132,919−13.8% | Reduced |
| American Capital Management Inc | 825,340 | $55.5M | 2.45% | +31,676+4.0% | Added |
| SG Capital Management LLC | 811,181 | $54.5M | 5.97% | +716,444+756.2% | Added |
| TimesSquare Capital Management, LLC | 809,321 | $54.4M | 0.82% | +2,790+0.3% | Added |
| Squarepoint Ops LLC | 795,563 | $53.5M | 0.11% | +784,263+6,940.4% | Added |
| JPMorgan Chase & Co | 772,040 | $51.9M | 0.00% | −1,144,825−59.7% | Reduced |
| Rhumbline Advisers | 768,835 | $51.7M | 0.04% | −21,028−2.7% | Reduced |
| ProShare Advisors LLC | 753,672 | $50.7M | 0.09% | +206,207+37.7% | Added |
| Peregrine Capital Management LLC | 748,873 | $50.4M | 1.54% | −11,963−1.6% | Reduced |
| Canada Pension Plan Investment Board | 741,403 | $49.9M | 0.03% | +107,073+16.9% | Added |
| California Public Employees Retirement System | 731,971 | $49.2M | 0.03% | +1,409+0.2% | Added |
| Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management | 719,850 | $48.4M | 2.87% | 00.0% | Unchanged |
| First Trust Advisors LP | 703,358 | $47.3M | 0.03% | +28,608+4.2% | Added |
| Douglas Lane & Associates, LLC | 683,061 | $45.9M | 0.63% | +28,279+4.3% | Added |
| California State Teachers Retirement System | 682,638 | $45.9M | 0.05% | −13,605−2.0% | Reduced |
| National Pension Service | 682,119 | $45.9M | 0.03% | +128,520+23.2% | Added |
| FIL Ltd | 639,883 | $43.0M | 0.03% | +425,635+198.7% | Added |
| Kayne Anderson Rudnick Investment Management LLC | 635,720 | $42.7M | 0.11% | −105,921−14.3% | Reduced |
| Petrus Trust Company, LTA | 629,198 | $42.3M | 4.28% | +292,651+87.0% | Added |
| SEI Investments Co | 621,779 | $41.8M | 0.04% | −49,907−7.4% | Reduced |
| Junto Capital Management LP | 615,998 | $41.4M | 0.93% | +615,998 | New |
| Ameriprise Financial Inc | 615,038 | $41.4M | 0.01% | −607,496−49.7% | Reduced |
| Citadel Advisors LLC | 604,543 | $40.6M | 0.03% | −1,122,075−65.0% | Reduced |
| Millennium Management LLC | 601,975 | $40.5M | 0.03% | +193,620+47.4% | Added |
| Caisse de Depot Et Placement du Quebec | 587,098 | $39.5M | 0.07% | +549,521+1,462.4% | Added |
| Ensign Peak Advisors, Inc | 578,356 | $38.9M | 0.07% | −119,645−17.1% | Reduced |
| Russell Investments Group, Ltd. | 547,600 | $36.8M | 0.04% | +72,177+15.2% | Added |
| Raymond James Financial Inc | 509,367 | $34.2M | 0.01% | −260,002−33.8% | Reduced |
| Mitsubishi UFJ Trust & Banking Corp | 477,836 | $32.1M | 0.08% | +11,558+2.5% | Added |