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 $12.3B 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
- +45 vs. Q2 2025
- Shares held
- 415.9M
- −9.95M (−2.3%) vs. Q2 2025
- Total value
- $35.1B
- +$810.6M (+2.4%) vs. Q2 2025
- New holders
- 107
- 366 more added
- Sold out
- 62
- 313 more reduced
13 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 | $12.3B |
| Q1 2026 | 797 | $16.8B |
| Q4 2025 | 847 | $28.6B |
| Q3 2025 | 905 | $35.1B |
| Q2 2025 | 873 | $34.3B |
| Q1 2025 | 858 | $34.0B |
| Q4 2024 | 805 | $29.3B |
| Q3 2024 | 773 | $30.2B |
| Q2 2024 | 767 | $29.4B |
| Q1 2024 | 767 | $40.1B |
| Q4 2023 | 737 | $34.7B |
| Q3 2023 | 690 | $30.1B |
| Q2 2023 | 714 | $35.6B |
| Q1 2023 | 692 | $27.0B |
| Q4 2022 | 704 | $30.5B |
| Q3 2022 | 634 | $29.1B |
| Q2 2022 | 591 | $23.2B |
| Q1 2022 | 589 | $25.2B |
| Q4 2021 | 633 | $30.2B |
| 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 |
|---|---|---|---|---|---|
| Vanguard Group Inc | 70,056,441 | $5.91B | 0.09% | +1,208,958+1.8% | Added |
| BlackRock, Inc. | 36,133,158 | $3.05B | 0.05% | +1,093,724+3.1% | Added |
| Bamco Inc | 19,255,566 | $1.62B | 4.31% | −424,369−2.2% | Reduced |
| Principal Financial Group Inc | 18,623,370 | $1.57B | 0.79% | −23,279−0.1% | Reduced |
| State Street Corp | 18,284,128 | $1.54B | 0.05% | +551,160+3.1% | Added |
| Geode Capital Management, LLC | 12,601,455 | $1.06B | 0.07% | +243,615+2.0% | Added |
| Akre Capital Management LLCSuperinvestorAkre Capital Management | 9,306,485 | $785.2M | 7.83% | −2,7470.0% | Reduced |
| Morgan Stanley | 8,543,024 | $720.8M | 0.04% | +1,131,496+15.3% | Added |
| Baillie Gifford & Co | 8,241,642 | $695.3M | 0.52% | −298,727−3.5% | Reduced |
| Massachusetts Financial Services Co | 7,406,788 | $624.9M | 0.19% | +821,111+12.5% | Added |
| Capital International Investors | 6,788,554 | $572.7M | 0.09% | −8,030,862−54.2% | Reduced |
| Polen Capital Management LLC | 6,380,909 | $538.4M | 1.75% | −542,919−7.8% | Reduced |
| Janus Henderson Group PLC | 6,216,807 | $524.5M | 0.24% | +2,180,980+54.0% | Added |
| Mizuho Markets Americas LLC | 5,123,216 | $432.2M | 9.11% | −734,126−12.5% | Reduced |
| Capital Research Global Investors | 4,993,854 | $421.3M | 0.08% | +1,062,452+27.0% | Added |
| UBS Group AG | 4,607,937 | $388.8M | 0.08% | −99,997−2.1% | Reduced |
| Invesco Ltd. | 4,537,343 | $382.8M | 0.06% | +98,879+2.2% | Added |
| Bank of New York Mellon Corp | 4,363,371 | $368.1M | 0.07% | −481,294−9.9% | Reduced |
| Macquarie Group Ltd | 4,267,156 | $360.0M | 0.42% | −567,455−11.7% | Reduced |
| JPMorgan Chase & Co | 3,833,730 | $323.5M | 0.01% | +1,542,879+67.3% | Added |
| Vulcan Value Partners, LLC | 3,831,609 | $323.2M | 5.86% | +115,125+3.1% | Added |
| Northern Trust Corp | 3,752,394 | $316.6M | 0.04% | −113,838−2.9% | Reduced |
| Franklin Resources Inc | 3,736,949 | $315.3M | 0.08% | +297,045+8.6% | Added |
| Bank of America Corp | 3,696,857 | $311.9M | 0.02% | −1,429,746−27.9% | Reduced |
| T. Rowe Price Investment Management, Inc. | 3,510,524 | $296.2M | 0.18% | −2,983,613−45.9% | Reduced |
| Nuveen, LLC | 3,506,625 | $295.9M | 0.08% | +2,424,722+224.1% | Added |
| Tiger Global Management LLCSuperinvestorTiger Global Management | 3,245,109 | $273.8M | 0.85% | 00.0% | Unchanged |
| Blair William & Co | 3,128,473 | $263.9M | 0.70% | +257,311+9.0% | Added |
| Third Point LLCSuperinvestorThird Point | 3,017,000 | $254.5M | 3.04% | −68,000−2.2% | Reduced |
| Amundi | 3,135,136 | $254.4M | 0.08% | −63,439−2.0% | Reduced |
| Legal & General Group Plc | 2,699,757 | $227.8M | 0.05% | +195,200+7.8% | Added |
| Charles Schwab Investment Management Inc | 2,656,604 | $224.1M | 0.04% | −435,519−14.1% | Reduced |
| Brown Advisory Inc | 2,464,724 | $207.9M | 0.27% | −211,270−7.9% | Reduced |
| UBS Asset Management Americas Inc | 2,459,610 | $207.5M | 0.05% | −522,088−17.5% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,437,206 | $205.6M | 0.53% | +172,176+7.6% | Added |
| Dimensional Fund Advisors LP | 2,236,180 | $188.7M | 0.04% | +67,262+3.1% | Added |
| Goldman Sachs Group Inc | 2,195,212 | $185.2M | 0.03% | +12,031+0.6% | Added |
| DF Dent & Co Inc | 2,177,724 | $183.7M | 2.37% | −92,646−4.1% | Reduced |
| Fayez Sarofim & Co | 2,174,799 | $183.5M | 0.43% | +17,666+0.8% | Added |
| RGM Capital, LLC | 2,092,703 | $176.6M | 7.43% | −30,000−1.4% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,849,729 | $156.1M | 0.41% | −1,368,839−42.5% | Reduced |
| Voya Investment Management LLC | 1,846,286 | $155.8M | 0.16% | +614,515+49.9% | Added |
| CIBC Private Wealth Group, LLC | 1,823,106 | $153.8M | 0.26% | −13,189−0.7% | Reduced |
| Citadel Advisors LLC | 1,726,618 | $145.7M | 0.12% | +1,695,175+5,391.3% | Added |
| Beck Mack & Oliver LLC | 1,723,432 | $145.4M | 2.64% | −3,214−0.2% | Reduced |
| Envestnet Asset Management Inc | 1,709,175 | $144.2M | 0.04% | −30,088−1.7% | Reduced |
| Riverbridge Partners LLC | 1,659,183 | $140.0M | 2.36% | −94,835−5.4% | Reduced |
| Mackenzie Financial Corp | 1,645,936 | $138.9M | 0.17% | −217,789−11.7% | Reduced |
| FMR LLC | 1,580,154 | $133.3M | 0.01% | +284,277+21.9% | Added |
| Federated Hermes, Inc. | 1,463,345 | $123.5M | 0.22% | −6,999−0.5% | Reduced |
| Deutsche Bank AG | 1,282,786 | $108.2M | 0.04% | −243,016−15.9% | Reduced |
| Kensico Capital Management Corp | 1,282,400 | $108.2M | 1.67% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,276,840 | $107.7M | 0.02% | −1,272,768−49.9% | Reduced |
| Barclays PLC | 1,266,116 | $106.8M | 0.04% | +94,810+8.1% | Added |
| Price T Rowe Associates Inc | 1,264,162 | $106.7M | 0.01% | +68,830+5.8% | Added |
| Bares Capital Management, Inc. | 1,226,251 | $103.5M | 9.54% | +11,599+1.0% | Added |
| Ameriprise Financial Inc | 1,222,534 | $103.1M | 0.02% | +144,789+13.4% | Added |
| Swiss National Bank | 1,216,165 | $102.6M | 0.06% | −60,600−4.7% | Reduced |
| Wells Fargo & Company | 1,136,954 | $95.9M | 0.02% | −194,208−14.6% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,096,701 | $92.5M | 0.05% | +75,401+7.4% | Added |
| Harding Loevner LP | 1,083,322 | $91.4M | 0.67% | −383,758−26.2% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,007,527 | $85.0M | 0.06% | +81,507+8.8% | Added |
| Spyglass Capital Management LLC | 1,002,717 | $84.6M | 4.51% | +199,435+24.8% | Added |
| Colony Group, LLC | 997,953 | $84.2M | 0.14% | +7,416+0.7% | Added |
| Chicago Capital, LLC | 960,042 | $81.0M | 1.99% | −4,248−0.4% | Reduced |
| D. E. Shaw & Co., Inc. | 905,488 | $76.4M | 0.06% | −10,900−1.2% | Reduced |
| ShawSpring Partners LLC | 896,034 | $75.6M | 11.24% | −460,026−33.9% | Reduced |
| Pictet Asset Management Holding SA | 848,792 | $71.6M | 0.07% | −66,283−7.2% | Reduced |
| TimesSquare Capital Management, LLC | 806,531 | $68.0M | 0.97% | −3,665−0.5% | Reduced |
| American Capital Management Inc | 793,664 | $67.0M | 2.67% | −2,297−0.3% | Reduced |
| Rhumbline Advisers | 789,863 | $66.6M | 0.05% | +7,695+1.0% | Added |
| Raymond James Financial Inc | 769,369 | $64.9M | 0.02% | +107,492+16.2% | Added |
| Stephens Investment Management Group LLC | 766,512 | $64.7M | 0.84% | −6,769−0.9% | Reduced |
| Peregrine Capital Management LLC | 760,836 | $64.2M | 1.93% | +60,293+8.6% | Added |
| Kayne Anderson Rudnick Investment Management LLC | 741,641 | $62.6M | 0.15% | −41,045−5.2% | Reduced |
| California Public Employees Retirement System | 730,562 | $61.6M | 0.04% | +43,644+6.4% | Added |
| Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management | 719,850 | $60.7M | 3.30% | −45,750−6.0% | Reduced |
| HSBC Holdings PLC | 717,320 | $60.4M | 0.04% | +8,932+1.3% | Added |
| Baird Financial Group, Inc. | 707,544 | $59.7M | 0.10% | −213,224−23.2% | Reduced |
| Ensign Peak Advisors, Inc | 698,001 | $58.9M | 0.10% | −73,377−9.5% | Reduced |
| California State Teachers Retirement System | 696,243 | $58.7M | 0.06% | −2,066−0.3% | Reduced |
| Ci Investments Inc. | 680,839 | $57.4M | 0.21% | −27,614−3.9% | Reduced |
| First Trust Advisors LP | 674,750 | $56.9M | 0.04% | +58,212+9.4% | Added |
| Citigroup Inc | 672,749 | $56.8M | 0.04% | −159,938−19.2% | Reduced |
| BNP Paribas Arbitrage, SA | 671,869 | $56.7M | 0.04% | −607,401−47.5% | Reduced |
| SEI Investments Co | 671,686 | $56.7M | 0.06% | +17,039+2.6% | Added |
| Douglas Lane & Associates, LLC | 654,782 | $55.2M | 0.77% | +70,471+12.1% | Added |
| Parnassus Investments | 636,974 | $53.7M | 0.12% | −18,424−2.8% | Reduced |
| Marshall Wace, LLP | 635,944 | $53.7M | 0.06% | +509,246+401.9% | Added |
| Canada Pension Plan Investment Board | 634,330 | $53.5M | 0.04% | +99,832+18.7% | Added |
| Ninety One UK Ltd | 622,828 | $52.5M | 0.06% | +302,813+94.6% | Added |
| Natixis Advisors, L.P. | 571,265 | $48.2M | 0.07% | +33,599+6.2% | Added |
| National Pension Service | 553,599 | $46.7M | 0.04% | +11,998+2.2% | Added |
| American Century Companies Inc | 551,523 | $46.5M | 0.02% | +481,024+682.3% | Added |
| Telemark Asset Management, LLC | 550,000 | $46.4M | 4.40% | 00.0% | Unchanged |
| ProShare Advisors LLC | 547,465 | $46.2M | 0.10% | −113,968−17.2% | Reduced |
| Ion Asset Management Ltd. | 534,000 | $45.1M | 5.50% | −635,833−54.4% | Reduced |
| ThornTree Capital Partners LP | 510,201 | $43.0M | 6.59% | −2,306−0.4% | Reduced |
| Frontier Capital Management Co LLC | 490,623 | $41.4M | 0.37% | −36,855−7.0% | Reduced |
| Russell Investments Group, Ltd. | 475,423 | $40.1M | 0.05% | +28,432+6.4% | Added |