CSGP CoStar Group, Inc.
CoStar Group, Inc. (CSGP) Institutional Ownership
What the institutions did with CSGP last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BAILLIE GIFFORD & CO | 11.4M | 18.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 11.0M | 18.0% |
| Amundi | 2.5M | 4.2% |
| BANK OF MONTREAL /CAN/ | 2.3M | 3.8% |
| DEUTSCHE BANK AG\ | 2.3M | 3.7% |
| Fiera Capital Corp | 2.2M | 3.6% |
| Squarepoint Ops LLC | 2.0M | 3.3% |
| Douglas Lane & Associates, LLC | 2.0M | 3.2% |
| THOMPSON SIEGEL & WALMSLEY LLC | 1.9M | 3.1% |
| FMR LLC | 1.7M | 2.8% |
| Bank of New York Mellon Corp | 1.7M | 2.8% |
| Nuveen, LLC | 1.5M | 2.5% |
| DIMENSIONAL FUND ADVISORS LP | 1.4M | 2.2% |
| Pictet Asset Management Holding SA | 1.1M | 1.8% |
| RIVERBRIDGE PARTNERS LLC | 1.0M | 1.6% |
| CITIGROUP INC | 731.4K | 1.2% |
| PRINCIPAL FINANCIAL GROUP INC | 615.8K | 1.0% |
| Mitsubishi UFJ Asset Management Co., Ltd. | 539.4K | 0.9% |
| JUPITER ASSET MANAGEMENT LTD | 534.1K | 0.9% |
| ASSETMARK, INC | 519.4K | 0.8% |
| Russell Investments Group, Ltd. | 485.5K | 0.8% |
| United Asset Strategies, Inc. | 481.5K | 0.8% |
| BARCLAYS PLC | 434.4K | 0.7% |
| Clearstead Advisors, LLC | 421.1K | 0.7% |
| Ninety One UK Ltd | 392.9K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 3.8M | 615.8K | -3.2M |
| BAILLIE GIFFORD & CO | Reduced | 13.2M | 11.4M | -1.8M |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 12.2M | 11.0M | -1.1M |
| Sumitomo Mitsui Trust Group, Inc. | Reduced | 925.1K | 79.7K | -845.4K |
| Douglas Lane & Associates, LLC | Increased | 1.2M | 2.0M | +811.2K |
| FMR LLC | Reduced | 2.5M | 1.7M | -736.8K |
| Fiera Capital Corp | Increased | 1.6M | 2.2M | +625.3K |
| Squarepoint Ops LLC | Increased | 1.4M | 2.0M | +590.9K |
| Amundi | Reduced | 3.1M | 2.5M | -587.9K |
| Chicago Capital, LLC | Reduced | 527.0K | 35.2K | -491.8K |
| ASSETMARK, INC | Increased | 38.9K | 519.4K | +480.5K |
| Mitsubishi UFJ Asset Management Co., Ltd. | Reduced | 1.0M | 539.4K | -476.0K |
| Clearstead Advisors, LLC | Increased | 586 | 421.1K | +420.6K |
| JUPITER ASSET MANAGEMENT LTD | Increased | 154.5K | 534.1K | +379.5K |
| BLAIR WILLIAM & CO/IL | Reduced | 658.2K | 305.1K | -353.1K |
| Pictet Asset Management Holding SA | Reduced | 1.5M | 1.1M | -341.6K |
| BARCLAYS PLC | Reduced | 758.6K | 434.4K | -324.2K |
| FIRST CITIZENS BANK & TRUST CO | Reduced | 363.2K | 43.7K | -319.6K |
| GENEVA CAPITAL MANAGEMENT LLC | Reduced | 418.1K | 119.5K | -298.6K |
| Aberdeen Group plc | Reduced | 312.3K | 18.3K | -294.1K |
| Russell Investments Group, Ltd. | Reduced | 762.9K | 485.5K | -277.5K |
| Bank of New York Mellon Corp | Reduced | 2.0M | 1.7M | -276.1K |
| DekaBank Deutsche Girozentrale | Reduced | 183.6K | 1.1K | -182.5K |
| Nuveen, LLC | Increased | 1.3M | 1.5M | +182.5K |
| DANSKE BANK A/S | Reduced | 174.1K | 2.2K | -171.9K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | New | 0 | 170.8K | +170.8K |
| Asset Management One Co., Ltd. | Reduced | 184.9K | 19.4K | -165.5K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.5M | 1.4M | -159.7K |
| HAHN CAPITAL MANAGEMENT LLC | Increased | 44.9K | 203.1K | +158.2K |
| CITIGROUP INC | Reduced | 889.6K | 731.4K | -158.1K |
| IMC-Chicago, LLC | New | 0 | 157.7K | +157.7K |
| Swedbank AB | Reduced | 181.8K | 27.6K | -154.2K |
| Jefferies Financial Group Inc. | Sold Out | 148.7K | 0 | -148.7K |
| Y-Intercept (Hong Kong) Ltd | Reduced | 420.9K | 273.0K | -147.9K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 101.5K | 243.3K | +141.8K |
| Lansforsakringar Fondforvaltning AB (publ) | Sold Out | 134.2K | 0 | -134.2K |
| THOMPSON SIEGEL & WALMSLEY LLC | Increased | 1.7M | 1.9M | +126.4K |
| FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUND | Reduced | 132.1K | 9.0K | -123.1K |
| Nykredit A/S | Reduced | 128.2K | 14.0K | -114.2K |
| IFM Investors Pty Ltd | Sold Out | 112.2K | 0 | -112.2K |
| Freestone Capital Holdings, LLC | New | 0 | 107.1K | +107.1K |
| BANK OF MONTREAL /CAN/ | Increased | 2.2M | 2.3M | +100.2K |
| RIVERBRIDGE PARTNERS LLC | Reduced | 1.1M | 1.0M | -86.8K |
| SEB Asset Management AB | Sold Out | 84.4K | 0 | -84.4K |
| Bastion Asset Management Inc. | Sold Out | 67.7K | 0 | -67.7K |
| Apollon Wealth Management, LLC | Reduced | 123.6K | 56.3K | -67.3K |
| SVB WEALTH LLC | Reduced | 90.2K | 24.0K | -66.2K |
| Buttonwood Financial Advisors Inc. | Increased | 103.9K | 165.8K | +61.9K |
| PATTEN & PATTEN INC/TN | Increased | 22.5K | 82.2K | +59.7K |
| Robeco Institutional Asset Management B.V. | Sold Out | 57.9K | 0 | -57.9K |
| FIFTH THIRD BANCORP | Increased | 79.2K | 135.3K | +56.1K |
| Fulcrum Asset Management LLP | Increased | 656 | 53.7K | +53.0K |
| Skylands Capital, LLC | Sold Out | 52.2K | 0 | -52.2K |
| Fideuram Asset Management (Ireland) dac | Reduced | 110.0K | 59.7K | -50.3K |
| ING GROEP NV | New | 0 | 49.4K | +49.4K |
| KBC Group NV | Reduced | 86.6K | 37.8K | -48.8K |
| OP Asset Management Ltd | Sold Out | 48.7K | 0 | -48.7K |
| Assenagon Asset Management S.A. | New | 0 | 46.5K | +46.5K |
| Sumitomo Mitsui DS Asset Management Company, Ltd | Reduced | 60.1K | 16.1K | -44.0K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Reduced | 123.1K | 80.5K | -42.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.