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, Q1 2026
Institutional positions in Costar Group, Inc. as of Mar 31, 2026. 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
- 797
- −34 vs. Q4 2025
- Shares held
- 415.9M
- +73.3M (+21.4%) vs. Q4 2025
- Total value
- $16.8B
- −$6.24B (−27.1%) vs. Q4 2025
- New holders
- 130
- 308 more added
- Sold out
- 164
- 276 more reduced
16 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Livforsakringsbolaget Skandia, Omsesidigt | 2,100 | $84.6K | 0.00% | 00.0% | Unchanged |
| Mather Group, LLC. | 2,170 | $87.5K | 0.00% | +2,170 | New |
| Westpac Banking Corp | 2,306 | $93.0K | 0.01% | 00.0% | Unchanged |
| Oslo Pensjonsforsikring AS | 2,309 | $93.1K | 0.01% | +2,309 | New |
| Farther Finance Advisors, LLC | 2,550 | $101.1K | 0.00% | +580+29.4% | Added |
| Archetype Wealth Partners | 2,660 | $107.0K | 0.01% | +2,660 | New |
| EverSource Wealth Advisors, LLC | 2,721 | $109.8K | 0.00% | +1,026+60.5% | Added |
| Towarzystwo Funduszy Inwestycyjnych Pzu SA | 2,900 | $117.0K | 0.04% | +600+26.1% | Added |
| Signaturefd, LLC | 2,964 | $119.6K | 0.00% | −194−6.1% | Reduced |
| Quarry LP | 3,203 | $129.2K | 0.03% | +2,262+240.4% | Added |
| Generali Asset Management SPA SGR | 3,217 | $129.8K | 0.00% | −23,959−88.2% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 3,452 | $139.0K | 0.00% | −14,529−80.8% | Reduced |
| Smartleaf Asset Management LLC | 3,453 | $141.2K | 0.01% | −3,387−49.5% | Reduced |
| Allworth Financial LP | 3,556 | $143.5K | 0.00% | +128+3.7% | Added |
| MAI Capital Management | 3,973 | $160.3K | 0.00% | +1,313+49.4% | Added |
| Canada Post Corp Registered Pension Plan | 4,170 | $168.2K | 0.01% | −10,000−70.6% | Reduced |
| Advisory Services Network, LLC | 4,202 | $169.5K | 0.00% | +4,202 | New |
| Parkside Financial Bank & Trust | 4,256 | $171.7K | 0.01% | −304−6.7% | Reduced |
| Harbor Investment Advisory, LLC | 4,295 | $173.3K | 0.01% | −1,880−30.4% | Reduced |
| Leonteq Securities AG | 4,743 | $191.3K | 0.01% | +1,038+28.0% | Added |
| Ostrum Asset Management | 4,771 | $192.5K | 0.01% | +70+1.5% | Added |
| Hantz Financial Services, Inc. | 4,784 | $193.0K | 0.00% | −65,661−93.2% | Reduced |
| Emerald Advisers, LLC | 4,808 | $194.0K | 0.01% | 00.0% | Unchanged |
| Caden Capital Partners, LP | 4,821 | $194.5K | 2.40% | +3,306+218.2% | Added |
| Checchi Capital Advisers, LLC | 5,061 | $204.2K | 0.01% | +943+22.9% | Added |
| Mirabella Financial Services LLP | 5,077 | $204.8K | 0.02% | +1,756+52.9% | Added |
| Wallace Advisory Group, LLC | 5,191 | $209.4K | 0.22% | +5,191 | New |
| AlphaGrep UK Ltd | 5,211 | $210.2K | 0.06% | +5,211 | New |
| Pembroke Management, LTD | 5,241 | $211.4K | 0.03% | −633−10.8% | Reduced |
| Integrated Investment Consultants, LLC | 5,245 | $211.6K | 0.04% | −55−1.0% | Reduced |
| Meeder Asset Management Inc | 5,392 | $217.5K | 0.01% | +5,392 | New |
| Alpha Family Trust | 5,410 | $218.2K | 0.11% | +5,410 | New |
| Fox Run Management, L.L.C. | 5,348 | $218.6K | 0.04% | +5,348 | New |
| Marks Group Wealth Management, Inc | 5,465 | $220.5K | 0.02% | −722−11.7% | Reduced |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 5,499 | $221.8K | 0.01% | −6,499−54.2% | Reduced |
| Sapient Capital LLC | 5,531 | $223.1K | 0.00% | −3,498−38.7% | Reduced |
| Fifth Third Wealth Advisors LLC | 5,638 | $227.4K | 0.01% | +5,638 | New |
| Groupama Asset Managment | 5,705 | $230.1K | 0.00% | −4,186−42.3% | Reduced |
| Nomura Holdings Inc | 5,722 | $230.8K | 0.00% | −1,228,395−99.5% | Reduced |
| Fidelis Capital Partners, LLC | 5,770 | $232.8K | 0.02% | +717+14.2% | Added |
| Syon Capital LLC | 5,800 | $234.0K | 0.01% | +640+12.4% | Added |
| Penserra Capital Management LLC | 5,887 | $236.0K | 0.00% | +137+2.4% | Added |
| Hengehold Capital Management LLC | 5,932 | $239.3K | 0.02% | −828−12.2% | Reduced |
| Siemens Fonds Invest GmbH | 5,942 | $239.7K | 0.01% | 00.0% | Unchanged |
| Evolve Private Wealth, LLC | 5,965 | $240.6K | 0.01% | +5,965 | New |
| Riverview Capital Advisers, LLC | 5,972 | $240.9K | 0.08% | +2,909+95.0% | Added |
| GTS Securities LLC | 5,986 | $241.5K | 0.01% | +102+1.7% | Added |
| Bridges Investment Management Inc | 6,000 | $242.0K | 0.00% | +3,000+100.0% | Added |
| Prestige Wealth Management Group LLC | 6,026 | $243.1K | 0.05% | +5,967+10,113.6% | Added |
| Rockefeller Capital Management L.P. | 6,071 | $244.9K | 0.00% | +242+4.2% | Added |
| Baker Tilly Wealth Management, LLC | 6,075 | $245.1K | 0.06% | −1,401−18.7% | Reduced |
| Perigon Wealth Management, LLC | 6,097 | $246.0K | 0.00% | +697+12.9% | Added |
| Davidson Kahn Capital Management, LLC | 6,156 | $246.7K | 0.13% | −36,675−85.6% | Reduced |
| Skopos Labs, Inc. | 6,128 | $247.2K | 0.01% | +6,128 | New |
| Integrated Advisors Network LLC | 6,140 | $247.7K | 0.01% | +6,140 | New |
| Blue Sparrow, LLC | 6,160 | $248.5K | 0.00% | +6,160 | New |
| V-Square Quantitative Management LLC | 6,205 | $250.3K | 0.03% | +1,135+22.4% | Added |
| Baron Wealth Management LLC | 6,277 | $253.2K | 0.08% | −865−12.1% | Reduced |
| Vontobel Holding Ltd. | 6,290 | $253.7K | 0.00% | +2,291+57.3% | Added |
| CIBC World Markets Inc. | 6,299 | $254.1K | 0.00% | +6,299 | New |
| Teacher Retirement System of Texas | 6,304 | $254.3K | 0.00% | −7,696−55.0% | Reduced |
| Balyasny Asset Management LLC | 6,326 | $255.2K | 0.00% | −17−0.3% | Reduced |
| Icon Wealth Advisors, LLC | 7,513 | $256.5K | 0.02% | −9,986−57.1% | Reduced |
| B.O.S.S. Retirement Advisors, LLC | 6,360 | $256.6K | 0.08% | −1,714−21.2% | Reduced |
| Savvy Advisors, Inc. | 6,404 | $258.3K | 0.01% | +6,404 | New |
| Sig Brokerage, LP | 6,424 | $259.1K | 0.07% | +6,424 | New |
| Coldstream Capital Management Inc | 6,541 | $263.9K | 0.00% | +1,778+37.3% | Added |
| TCW Group Inc | 6,583 | $265.6K | 0.00% | +318+5.1% | Added |
| IMC-Chicago, LLC | 6,637 | $267.7K | 0.00% | +6,637 | New |
| Wheels Up Wealth, Inc. | 6,940 | $280.0K | 0.26% | 00.0% | Unchanged |
| Snowden Capital Advisors LLC | 6,942 | $280.0K | 0.01% | −519−7.0% | Reduced |
| Blueshift Asset Management, LLC | 6,985 | $281.8K | 0.09% | +6,985 | New |
| Motley Fool Asset Management LLC | 7,088 | $285.9K | 0.01% | −33,255−82.4% | Reduced |
| Jump Financial, LLC | 7,141 | $288.1K | 0.00% | +7,141 | New |
| Ramiah Investment Group | 7,217 | $291.1K | 0.25% | +1,755+32.1% | Added |
| RSM US Wealth Management LLC | 7,279 | $293.6K | 0.00% | −2,539−25.9% | Reduced |
| Huntington National Bank | 7,314 | $295.0K | 0.00% | +2,059+39.2% | Added |
| Pensionmark Financial Group, LLC | 7,321 | $295.3K | 0.00% | +3,930+115.9% | Added |
| Pallas Capital Advisors LLC | 7,437 | $300.0K | 0.01% | +7,437 | New |
| Brown Brothers Harriman & Co | 7,438 | $300.0K | 0.00% | +6,390+609.7% | Added |
| Stansberry Asset Management, LLC | 7,463 | $301.1K | 0.03% | −539−6.7% | Reduced |
| Sowell Financial Services LLC | 7,497 | $302.4K | 0.01% | −2,218−22.8% | Reduced |
| ORG Wealth Partners, LLC | 7,497 | $302.4K | 0.06% | +5,273+237.1% | Added |
| Tema ETFs LLC | 7,536 | $304.0K | 0.02% | +1,351+21.8% | Added |
| Natixis | 7,637 | $308.1K | 0.00% | −12,901−62.8% | Reduced |
| Commerzbank Aktiengesellschaft | 7,761 | $313.0K | 0.01% | +7,761 | New |
| Trust Point Inc. | 7,810 | $315.1K | 0.03% | +733+10.4% | Added |
| Conestoga Capital Advisors, LLC | 7,859 | $317.0K | 0.01% | −4,418−36.0% | Reduced |
| Castleview Partners, LLC | 8,012 | $323.2K | 0.17% | +8,012 | New |
| Pitcairn Wealth Advisors LLC | 4,853 | $326.3K | 0.03% | +243+5.3% | Added |
| Bayesian Capital Management, LP | 8,100 | $326.8K | 0.40% | +8,100 | New |
| Aaron Wealth Advisors | 8,130 | $328.0K | 0.02% | +655+8.8% | Added |
| Chicago Trust Co NA | 8,140 | $328.4K | 0.05% | −4,859−37.4% | Reduced |
| Empirical Finance, LLC | 8,225 | $331.8K | 0.02% | 00.0% | Unchanged |
| Integrated Wealth Concepts LLC | 8,283 | $334.1K | 0.00% | +4,674+129.5% | Added |
| Buckingham Strategic Partners | 8,346 | $336.7K | 0.00% | +8,346 | New |
| Sentinus, LLC | 8,441 | $340.5K | 0.03% | +8,441 | New |
| Hillman Capital Management, Inc. | 8,557 | $345.2K | 0.24% | +8,557 | New |
| Plato Investment Management Ltd | 8,565 | $345.7K | 0.02% | 00.0% | Unchanged |
| Assenagon Asset Management S.A. | 8,599 | $346.9K | 0.00% | −2,862−25.0% | Reduced |