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, 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
- 847
- −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
- 103
- 273 more added
- Sold out
- 143
- 388 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 | 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, 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 |
|---|---|---|---|---|---|
| Jane Street Group, LLC | 237,376 | $16.0M | 0.02% | +121,745+105.3% | Added |
| Oppenheimer Asset Management Inc. | 239,995 | $16.1M | 0.20% | −34,750−12.6% | Reduced |
| No Street GP LP | 239,999 | $16.1M | 1.09% | −210,001−46.7% | Reduced |
| Gilder Gagnon Howe & Co LLC | 240,034 | $16.1M | 0.17% | −38,469−13.8% | Reduced |
| Stifel Financial Corp | 241,718 | $16.3M | 0.01% | −28,952−10.7% | Reduced |
| ThornTree Capital Partners LP | 242,032 | $16.3M | 2.72% | −268,169−52.6% | Reduced |
| Rafferty Asset Management, LLC | 242,845 | $16.3M | 0.06% | +45,311+22.9% | Added |
| Envestnet Portfolio Solutions, Inc. | 245,184 | $16.5M | 0.06% | +122,776+100.3% | Added |
| Ashford Capital Management Inc | 247,959 | $16.7M | 1.86% | −32,779−11.7% | Reduced |
| Manufacturers Life Insurance Company, The | 252,217 | $17.0M | 0.01% | −2,910−1.1% | Reduced |
| First Citizens Bank & Trust Co | 257,404 | $17.3M | 0.36% | +139,258+117.9% | Added |
| Teachers Retirement System of the State of Kentucky | 266,783 | $17.9M | 0.13% | +70,421+35.9% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 268,413 | $18.1M | 0.03% | +9,606+3.7% | Added |
| Parnassus Investments | 272,688 | $18.3M | 0.05% | −364,286−57.2% | Reduced |
| DekaBank Deutsche Girozentrale | 183,640 | $18.6M | 0.03% | 00.0% | Unchanged |
| Aviva PLC | 282,218 | $19.0M | 0.03% | +13,968+5.2% | Added |
| NEOS Investment Management LLC | 290,986 | $19.6M | 0.11% | +75,292+34.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 301,203 | $20.3M | 0.03% | −9,790−3.1% | Reduced |
| Swedbank AB | 303,205 | $20.4M | 0.02% | +845+0.3% | Added |
| Standard Life Aberdeen plc | 310,072 | $20.8M | 0.03% | −1,555−0.5% | Reduced |
| Prana Capital Management, LP | 316,860 | $21.3M | 0.77% | +150,369+90.3% | Added |
| Erste Asset Management GmbH | 320,000 | $21.5M | 0.18% | +120,000+60.0% | Added |
| New York State Teachers Retirement System | 322,756 | $21.7M | 0.04% | −681−0.2% | Reduced |
| Ulysses Management LLC | 330,500 | $22.2M | 5.83% | +60,000+22.2% | Added |
| Victory Capital Management Inc | 334,993 | $22.5M | 0.01% | +7,436+2.3% | Added |
| Aureus Asset Management, LLC | 337,117 | $22.7M | 1.44% | −1,960−0.6% | Reduced |
| Ci Investments Inc. | 343,534 | $23.1M | 0.10% | −337,305−49.5% | Reduced |
| Fiera Capital Corp | 350,930 | $23.6M | 0.07% | +116,599+49.8% | Added |
| LGT Group Foundation | 347,732 | $23.6M | 0.26% | +4,642+1.4% | Added |
| National Bank of Canada | 353,615 | $23.8M | 0.02% | +150,759+74.3% | Added |
| Ninety One UK Ltd | 354,804 | $23.9M | 0.05% | +43,390+13.9% | Added |
| Ycg, LLC | 359,225 | $24.2M | 1.82% | −960.0% | Reduced |
| AQR Capital Management LLC | 369,352 | $24.8M | 0.01% | +45,609+14.1% | Added |
| Ironvine Capital Partners, LLC | 371,224 | $25.0M | 2.50% | −59,110−13.7% | Reduced |
| State Board of Administration of Florida Retirement System | 376,003 | $25.3M | 0.04% | −15,350−3.9% | Reduced |
| Clearbridge Investments, LLC | 382,138 | $25.7M | 0.02% | −16,975−4.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 382,600 | $25.7M | 0.04% | −3,100−0.8% | Reduced |
| Marshall Wace, LLP | 391,305 | $26.3M | 0.03% | −244,639−38.5% | Reduced |
| Royal London Asset Management Ltd | 409,563 | $27.5M | 0.06% | +2,499+0.6% | Added |
| Sone Capital Management, LLC | 417,145 | $28.0M | 2.28% | +83,233+24.9% | Added |
| Alliancebernstein L.P. | 422,173 | $28.4M | 0.01% | −42,650−9.2% | Reduced |
| Natixis Advisors, L.P. | 432,848 | $29.1M | 0.04% | −138,417−24.2% | Reduced |
| NZS Capital, LLC | 441,362 | $29.7M | 0.91% | +67,930+18.2% | Added |
| Geneva Capital Management LLC | 450,799 | $30.3M | 0.57% | +14,790+3.4% | Added |
| Bank of Montreal | 453,968 | $30.5M | 0.01% | −15,712−3.3% | Reduced |
| TD Asset Management Inc | 457,565 | $30.8M | 0.02% | +2,135+0.5% | Added |
| ION Fund Management Ltd | 461,000 | $31.0M | 3.95% | +461,000 | New |
| Mitsubishi UFJ Trust & Banking Corp | 477,836 | $32.1M | 0.08% | +11,558+2.5% | Added |
| Raymond James Financial Inc | 509,367 | $34.2M | 0.01% | −260,002−33.8% | Reduced |
| Russell Investments Group, Ltd. | 547,600 | $36.8M | 0.04% | +72,177+15.2% | Added |
| Ensign Peak Advisors, Inc | 578,356 | $38.9M | 0.07% | −119,645−17.1% | Reduced |
| Caisse de Depot Et Placement du Quebec | 587,098 | $39.5M | 0.07% | +549,521+1,462.4% | Added |
| Millennium Management LLC | 601,975 | $40.5M | 0.03% | +193,620+47.4% | Added |
| Citadel Advisors LLC | 604,543 | $40.6M | 0.03% | −1,122,075−65.0% | Reduced |
| Ameriprise Financial Inc | 615,038 | $41.4M | 0.01% | −607,496−49.7% | Reduced |
| Junto Capital Management LP | 615,998 | $41.4M | 0.93% | +615,998 | New |
| SEI Investments Co | 621,779 | $41.8M | 0.04% | −49,907−7.4% | Reduced |
| Petrus Trust Company, LTA | 629,198 | $42.3M | 4.28% | +292,651+87.0% | Added |
| Kayne Anderson Rudnick Investment Management LLC | 635,720 | $42.7M | 0.11% | −105,921−14.3% | Reduced |
| FIL Ltd | 639,883 | $43.0M | 0.03% | +425,635+198.7% | Added |
| National Pension Service | 682,119 | $45.9M | 0.03% | +128,520+23.2% | Added |
| California State Teachers Retirement System | 682,638 | $45.9M | 0.05% | −13,605−2.0% | Reduced |
| Douglas Lane & Associates, LLC | 683,061 | $45.9M | 0.63% | +28,279+4.3% | Added |
| First Trust Advisors LP | 703,358 | $47.3M | 0.03% | +28,608+4.2% | Added |
| Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management | 719,850 | $48.4M | 2.87% | 00.0% | Unchanged |
| California Public Employees Retirement System | 731,971 | $49.2M | 0.03% | +1,409+0.2% | Added |
| Canada Pension Plan Investment Board | 741,403 | $49.9M | 0.03% | +107,073+16.9% | Added |
| Peregrine Capital Management LLC | 748,873 | $50.4M | 1.54% | −11,963−1.6% | Reduced |
| ProShare Advisors LLC | 753,672 | $50.7M | 0.09% | +206,207+37.7% | Added |
| Rhumbline Advisers | 768,835 | $51.7M | 0.04% | −21,028−2.7% | Reduced |
| JPMorgan Chase & Co | 772,040 | $51.9M | 0.00% | −1,144,825−59.7% | Reduced |
| Squarepoint Ops LLC | 795,563 | $53.5M | 0.11% | +784,263+6,940.4% | Added |
| TimesSquare Capital Management, LLC | 809,321 | $54.4M | 0.82% | +2,790+0.3% | Added |
| SG Capital Management LLC | 811,181 | $54.5M | 5.97% | +716,444+756.2% | Added |
| American Capital Management Inc | 825,340 | $55.5M | 2.45% | +31,676+4.0% | Added |
| Chicago Capital, LLC | 827,123 | $55.6M | 1.37% | −132,919−13.8% | Reduced |
| Colony Group, LLC | 841,115 | $56.6M | 0.06% | −156,838−15.7% | Reduced |
| Wells Fargo & Company | 880,972 | $59.2M | 0.01% | −255,982−22.5% | Reduced |
| Kensico Capital Management Corp | 901,600 | $60.6M | 1.03% | −380,800−29.7% | Reduced |
| D. E. Shaw & Co., Inc. | 905,488 | $60.9M | 0.05% | 00.0% | Unchanged |
| Harding Loevner LP | 920,272 | $61.9M | 0.54% | −163,050−15.1% | Reduced |
| ShawSpring Partners LLC | 957,557 | $64.4M | 12.12% | +61,523+6.9% | Added |
| HSBC Holdings PLC | 987,270 | $66.4M | 0.04% | +269,950+37.6% | Added |
| BNP Paribas Arbitrage, SA | 997,813 | $67.1M | 0.04% | +325,944+48.5% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 999,684 | $67.2M | 0.04% | −97,017−8.8% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,057,184 | $69.4M | 0.05% | +49,657+4.9% | Added |
| Pictet Asset Management Holding SA | 1,055,508 | $71.0M | 0.07% | +206,716+24.4% | Added |
| Stephens Investment Management Group LLC | 1,114,972 | $75.0M | 0.98% | +348,460+45.5% | Added |
| Swiss National Bank | 1,160,965 | $78.1M | 0.05% | −55,200−4.5% | Reduced |
| Franklin Resources Inc | 1,162,422 | $78.2M | 0.02% | −2,574,527−68.9% | Reduced |
| Capitolis Liquid Global Markets LLC | 1,184,000 | $79.6M | 0.47% | +1,184,000 | New |
| Price T Rowe Associates Inc | 1,198,832 | $80.6M | 0.01% | −65,330−5.2% | Reduced |
| FMR LLC | 1,202,153 | $80.8M | 0.00% | −378,001−23.9% | Reduced |
| Nomura Holdings Inc | 1,234,117 | $83.0M | 0.24% | +1,222,867+10,869.9% | Added |
| Royal Bank of Canada | 1,307,942 | $87.9M | 0.02% | +31,102+2.4% | Added |
| Federated Hermes, Inc. | 1,322,999 | $89.0M | 0.15% | −140,346−9.6% | Reduced |
| Envestnet Asset Management Inc | 1,335,852 | $89.8M | 0.03% | −373,323−21.8% | Reduced |
| CIBC Private Wealth Group, LLC | 1,361,651 | $91.6M | 0.15% | −461,455−25.3% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,442,582 | $97.0M | 0.26% | −407,147−22.0% | Reduced |
| Riverbridge Partners LLC | 1,452,546 | $97.7M | 1.83% | −206,637−12.5% | Reduced |