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 |
|---|---|---|---|---|---|
| ION Fund Management Ltd | 461,000 | $31.0M | 3.95% | +461,000 | New |
| TD Asset Management Inc | 457,565 | $30.8M | 0.02% | +2,135+0.5% | Added |
| Bank of Montreal | 453,968 | $30.5M | 0.01% | −15,712−3.3% | Reduced |
| Geneva Capital Management LLC | 450,799 | $30.3M | 0.57% | +14,790+3.4% | Added |
| NZS Capital, LLC | 441,362 | $29.7M | 0.91% | +67,930+18.2% | Added |
| Natixis Advisors, L.P. | 432,848 | $29.1M | 0.04% | −138,417−24.2% | Reduced |
| Alliancebernstein L.P. | 422,173 | $28.4M | 0.01% | −42,650−9.2% | Reduced |
| Sone Capital Management, LLC | 417,145 | $28.0M | 2.28% | +83,233+24.9% | Added |
| Royal London Asset Management Ltd | 409,563 | $27.5M | 0.06% | +2,499+0.6% | Added |
| Marshall Wace, LLP | 391,305 | $26.3M | 0.03% | −244,639−38.5% | Reduced |
| Adage Capital Partners GP, L.L.C. | 382,600 | $25.7M | 0.04% | −3,100−0.8% | Reduced |
| Clearbridge Investments, LLC | 382,138 | $25.7M | 0.02% | −16,975−4.3% | Reduced |
| State Board of Administration of Florida Retirement System | 376,003 | $25.3M | 0.04% | −15,350−3.9% | Reduced |
| Ironvine Capital Partners, LLC | 371,224 | $25.0M | 2.50% | −59,110−13.7% | Reduced |
| AQR Capital Management LLC | 369,352 | $24.8M | 0.01% | +45,609+14.1% | Added |
| Ycg, LLC | 359,225 | $24.2M | 1.82% | −960.0% | Reduced |
| Ninety One UK Ltd | 354,804 | $23.9M | 0.05% | +43,390+13.9% | Added |
| National Bank of Canada | 353,615 | $23.8M | 0.02% | +150,759+74.3% | Added |
| LGT Group Foundation | 347,732 | $23.6M | 0.26% | +4,642+1.4% | Added |
| Fiera Capital Corp | 350,930 | $23.6M | 0.07% | +116,599+49.8% | Added |
| Ci Investments Inc. | 343,534 | $23.1M | 0.10% | −337,305−49.5% | Reduced |
| Aureus Asset Management, LLC | 337,117 | $22.7M | 1.44% | −1,960−0.6% | Reduced |
| Victory Capital Management Inc | 334,993 | $22.5M | 0.01% | +7,436+2.3% | Added |
| Ulysses Management LLC | 330,500 | $22.2M | 5.83% | +60,000+22.2% | Added |
| New York State Teachers Retirement System | 322,756 | $21.7M | 0.04% | −681−0.2% | Reduced |
| Erste Asset Management GmbH | 320,000 | $21.5M | 0.18% | +120,000+60.0% | Added |
| Prana Capital Management, LP | 316,860 | $21.3M | 0.77% | +150,369+90.3% | Added |
| Standard Life Aberdeen plc | 310,072 | $20.8M | 0.03% | −1,555−0.5% | Reduced |
| Swedbank AB | 303,205 | $20.4M | 0.02% | +845+0.3% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 301,203 | $20.3M | 0.03% | −9,790−3.1% | Reduced |
| NEOS Investment Management LLC | 290,986 | $19.6M | 0.11% | +75,292+34.9% | Added |
| Aviva PLC | 282,218 | $19.0M | 0.03% | +13,968+5.2% | Added |
| DekaBank Deutsche Girozentrale | 183,640 | $18.6M | 0.03% | 00.0% | Unchanged |
| Parnassus Investments | 272,688 | $18.3M | 0.05% | −364,286−57.2% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 268,413 | $18.1M | 0.03% | +9,606+3.7% | Added |
| Teachers Retirement System of the State of Kentucky | 266,783 | $17.9M | 0.13% | +70,421+35.9% | Added |
| First Citizens Bank & Trust Co | 257,404 | $17.3M | 0.36% | +139,258+117.9% | Added |
| Manufacturers Life Insurance Company, The | 252,217 | $17.0M | 0.01% | −2,910−1.1% | Reduced |
| Ashford Capital Management Inc | 247,959 | $16.7M | 1.86% | −32,779−11.7% | Reduced |
| Envestnet Portfolio Solutions, Inc. | 245,184 | $16.5M | 0.06% | +122,776+100.3% | Added |
| Rafferty Asset Management, LLC | 242,845 | $16.3M | 0.06% | +45,311+22.9% | Added |
| ThornTree Capital Partners LP | 242,032 | $16.3M | 2.72% | −268,169−52.6% | Reduced |
| Stifel Financial Corp | 241,718 | $16.3M | 0.01% | −28,952−10.7% | Reduced |
| Gilder Gagnon Howe & Co LLC | 240,034 | $16.1M | 0.17% | −38,469−13.8% | Reduced |
| No Street GP LP | 239,999 | $16.1M | 1.09% | −210,001−46.7% | Reduced |
| Oppenheimer Asset Management Inc. | 239,995 | $16.1M | 0.20% | −34,750−12.6% | Reduced |
| Jane Street Group, LLC | 237,376 | $16.0M | 0.02% | +121,745+105.3% | Added |
| Great West Life Assurance Co | 236,960 | $15.9M | 0.03% | −193,299−44.9% | Reduced |
| SG Americas Securities, LLC | 234,893 | $15.8M | 0.02% | +230,378+5,102.5% | Added |
| Tran Capital Management, L.P. | 233,303 | $15.7M | 1.88% | −32,287−12.2% | Reduced |
| State of Wisconsin Investment Board | 228,542 | $15.4M | 0.03% | −23,241−9.2% | Reduced |
| New York State Common Retirement Fund | 227,825 | $15.3M | 0.02% | 00.0% | Unchanged |
| Man Group plc | 225,253 | $15.1M | 0.03% | +105,994+88.9% | Added |
| Umb Bank N A | 224,611 | $15.1M | 0.20% | −694−0.3% | Reduced |
| Kornitzer Capital Management Inc | 224,416 | $15.1M | 0.31% | −7,210−3.1% | Reduced |
| Quantum Capital Management, LLC | 218,583 | $14.7M | 1.70% | −184,312−45.7% | Reduced |
| Danske Bank A/S | 218,361 | $14.7M | 0.03% | +15,261+7.5% | Added |
| Public Employees Retirement Association of Colorado | 216,263 | $14.5M | 0.05% | 00.0% | Unchanged |
| Chevy Chase Trust Holdings, Inc. | 215,088 | $14.5M | 0.04% | −3,884−1.8% | Reduced |
| NS Partners Ltd | 214,981 | $14.5M | 0.57% | +178+0.1% | Added |
| Visualize Group LP | 214,388 | $14.4M | 5.38% | −214,450−50.0% | Reduced |
| Nicholas Company, Inc. | 214,249 | $14.4M | 0.25% | −650.0% | Reduced |
| Prudential Financial Inc | 211,975 | $14.3M | 0.02% | −27,918−11.6% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 210,095 | $14.1M | 0.04% | +38,715+22.6% | Added |
| Korea Investment CORP | 205,123 | $13.8M | 0.03% | −39,877−16.3% | Reduced |
| Tudor Investment Corp Et Al | 205,000 | $13.8M | 0.08% | +205,000 | New |
| Motley Fool Wealth Management, LLC | 203,448 | $13.7M | 1.06% | −52,405−20.5% | Reduced |
| Quantinno Capital Management LP | 202,148 | $13.6M | 0.03% | +84,437+71.7% | Added |
| Freestone Grove Partners LP | 201,205 | $13.5M | 0.10% | +157,142+356.6% | Added |
| CIBC Asset Management Inc | 199,891 | $13.4M | 0.03% | +46,182+30.0% | Added |
| Susquehanna International Group, LLP | 194,684 | $13.1M | 0.02% | +69,649+55.7% | Added |
| Foster Victor Wealth Advisors, LLC | 197,979 | $12.9M | 0.75% | −10,697−5.1% | Reduced |
| CIBC World Markets Corp | 186,141 | $12.5M | 0.06% | +186,141 | New |
| APG Asset Management N.V. | 218,356 | $12.5M | 0.04% | −16,344−7.0% | Reduced |
| Asset Management One Co.,Ltd. | 183,391 | $12.4M | 0.03% | +607+0.3% | Added |
| Cortland Associates Inc | 183,144 | $12.3M | 1.55% | −8,448−4.4% | Reduced |
| Allspring Global Investments Holdings, LLC | 182,879 | $12.0M | 0.02% | −106,391−36.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 177,966 | $12.0M | 0.03% | +6,993+4.1% | Added |
| BSN Capital Partners Ltd | 150,857 | $11.8M | 0.56% | +150,857 | New |
| Treasurer of the State of North Carolina | 174,964 | $11.8M | 0.04% | −12,784−6.8% | Reduced |
| Ossiam | 173,867 | $11.7M | 0.23% | −1,951−1.1% | Reduced |
| Neuberger Berman Group LLC | 169,667 | $11.4M | 0.01% | −252,126−59.8% | Reduced |
| Badgley Phelps Wealth Managers, LLC | 166,253 | $11.2M | 0.20% | −9,048−5.2% | Reduced |
| Credit Agricole S A | 165,698 | $11.1M | 0.03% | +27,326+19.7% | Added |
| Jennison Associates LLC | 164,960 | $11.1M | 0.01% | +47,665+40.6% | Added |
| La Banque Postale Asset Management SA | 164,851 | $11.1M | 0.13% | +120,481+271.5% | Added |
| Clearstead Advisors, LLC | 160,512 | $10.8M | 0.14% | −32,072−16.7% | Reduced |
| Nomura Asset Management Co Ltd | 155,881 | $10.5M | 0.03% | +2,781+1.8% | Added |
| Landmark Investment Partners, L.P. | 154,480 | $10.4M | 8.90% | +5,095+3.4% | Added |
| KLP Kapitalforvaltning AS | 153,300 | $10.3M | 0.04% | 00.0% | Unchanged |
| Toronto Dominion Bank | 152,163 | $10.2M | 0.02% | −21,009−12.1% | Reduced |
| Cetera Investment Advisers | 151,023 | $10.2M | 0.01% | −11,674−7.2% | Reduced |
| Primecap Management Co | 151,000 | $10.2M | 0.01% | +53,000+54.1% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 147,170 | $9.90M | 0.09% | +147,170 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 146,546 | $9.85M | 0.02% | −148,000−50.2% | Reduced |
| State of New Jersey Common Pension Fund D | 145,258 | $9.77M | 0.04% | −1,741−1.2% | Reduced |
| ExodusPoint Capital Management, LP | 139,296 | $9.37M | 0.10% | +139,296 | New |
| Lansforsakringar Fondforvaltning AB (publ) | 136,026 | $9.15M | 0.05% | +1,265+0.9% | Added |
| Gotham Asset Management, LLC | 130,347 | $8.76M | 0.03% | +107,696+475.5% | Added |
| HighTower Advisors, LLC | 128,451 | $8.64M | 0.01% | −7,633−5.6% | Reduced |