CoStar Group: which funds bought and sold
Institutions that bought and sold CoStar Group shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 406 institutions that filed 13F reports for both quarters added to or opened positions in CoStar Group, and 399 cut or closed them. Together they sold a net 6.5M shares, −1.6% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 22.2M shares (+21.0%); index fund managers were net sellers of 2.3M shares (−1.7%). 105 opened a new position and 140 sold out entirely.
Bought, Q2 2026 406 institutions, 105 of them new holders Sold, Q2 2026 399 institutions, 140 of them sold out
Net change, all compared −6.5M shares (−1.6%)
Net change, active managers +22.2M shares (+21.0%), 44 bought, 36 sold
Buyers versus sellers
406 bought 76 399 sold
Active managers and hedge funds 44 bought · 36 sold · +22.2M
Index fund managers 4 bought · 8 sold · −2.3M
Other institutions 358 bought · 355 sold · −26.3M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| AQR Capital Management LLC Hedge fund | +7.2M +568.8% | 8.4M | $239M |
| Edgepoint Investment Group Inc. Active manager | +6.0M New position | 6.0M | $169M |
| BAMCO Inc Active manager | +5.3M +32.6% | 21.6M | $612M |
| Qube Research & Technologies Ltd Hedge fund | +3.2M New position | 3.2M | $91.1M |
| Federated Hermes, Inc. Active manager | +3.1M +241.1% | 4.4M | $125M |
| Jpmorgan Chase & Co | +3.1M +167.1% | 4.9M | $145M |
| Meritage Group LP | +2.1M +62.0% | 5.4M | $153M |
| Massachusetts Financial Services Co Active manager | +2.0M +212.1% | 3.0M | $84.5M |
| Spyglass Capital Management LLC Hedge fund | +1.6M +142.5% | 2.7M | $76.3M |
| Akre Capital Management LLC Active manager | +1.4M +13.1% | 11.7M | $331M |
| Arrowstreet Capital, Limited Partnership Hedge fund | +1.3M +3076.5% | 1.3M | $36.8M |
| Erste Asset Management Gmbh | +1.3M +277.8% | 1.7M | $49.8M |
| Capital International Investors Active manager | +1.1M +7.3% | 16.6M | $471M |
| Thompson Siegel & Walmsley LLC | +1.1M +183.5% | 1.7M | $49.4M |
| Fiera Capital Corp | +1.1M +225.3% | 1.6M | $44.4M |
| Jane Street Group, LLC | +1.1M +98.8% | 2.2M | $61.2M |
| Connor, Clark & Lunn Investment Management Ltd. | +1.1M +986.3% | 1.2M | $33.1M |
| UBS Group AG | +1.0M +75.6% | 2.3M | $65.9M |
| Marshall Wace, LLP Hedge fund | +864K +167.0% | 1.4M | $39.1M |
| Capital Fund Management S.A. Hedge fund | +856K +1847.5% | 903K | $25.6M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| AQR Capital Management LLC Hedge fund | +7.2M +568.8% | 8.4M | $239M |
| Edgepoint Investment Group Inc. Active manager | +6.0M New position | 6.0M | $169M |
| BAMCO Inc Active manager | +5.3M +32.6% | 21.6M | $612M |
| Qube Research & Technologies Ltd Hedge fund | +3.2M New position | 3.2M | $91.1M |
| Federated Hermes, Inc. Active manager | +3.1M +241.1% | 4.4M | $125M |
| Massachusetts Financial Services Co Active manager | +2.0M +212.1% | 3.0M | $84.5M |
| Spyglass Capital Management LLC Hedge fund | +1.6M +142.5% | 2.7M | $76.3M |
| Akre Capital Management LLC Active manager | +1.4M +13.1% | 11.7M | $331M |
| Arrowstreet Capital, Limited Partnership Hedge fund | +1.3M +3076.5% | 1.3M | $36.8M |
| Capital International Investors Active manager | +1.1M +7.3% | 16.6M | $471M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Principal Financial Group Inc | −13.9M −78.6% | 3.8M | $107M |
| Invesco Ltd. | −9.1M −57.3% | 6.8M | $193M |
| D. E. Shaw & Co., Inc. Hedge fund | −4.9M −82.3% | 1.0M | $29.5M |
| Goldman Sachs Group Inc | −4.1M −44.5% | 5.1M | $145M |
| Polen Capital Management LLC Active manager | −3.8M −30.3% | 8.8M | $248M |
| Tiger Global Management LLC Hedge fund | −1.5M Sold out | 0 | — |
| Mackenzie Financial Corp | −1.5M −90.5% | 155K | $4.4M |
| Greenhouse Funds LLLP | −1.4M Sold out | 0 | — |
| Capitolis Liquid Global Markets LLC | −1.4M Sold out | 0 | — |
| Legal & General Group PLC | −1.3M −44.4% | 1.7M | $47.7M |
| Tremblant Capital Group Hedge fund | −1.3M −84.8% | 229K | $6.5M |
| Dimensional Fund Advisors LP | −886K −36.9% | 1.5M | $42.9M |
| Stephens Investment Management Group LLC | −872K Sold out | 0 | — |
| Corvex Management LP Hedge fund | −852K Sold out | 0 | — |
| Bank Of America Corp | −833K −23.3% | 2.7M | $77.5M |
| Price T Rowe Associates Inc Active manager | −832K −54.8% | 686K | $19.4M |
| First Trust Advisors LP | −813K −96.9% | 26K | $743,711 |
| Timessquare Capital Management, LLC | −796K Sold out | 0 | — |
| Vanguard Capital Management LLC Index funds | −740K −2.7% | 26.7M | $756M |
| National Pension Service | −660K −94.0% | 42K | $1.2M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| D. E. Shaw & Co., Inc. Hedge fund | −4.9M −82.3% | 1.0M | $29.5M |
| Polen Capital Management LLC Active manager | −3.8M −30.3% | 8.8M | $248M |
| Tiger Global Management LLC Hedge fund | −1.5M Sold out | 0 | — |
| Tremblant Capital Group Hedge fund | −1.3M −84.8% | 229K | $6.5M |
| Corvex Management LP Hedge fund | −852K Sold out | 0 | — |
| Price T Rowe Associates Inc Active manager | −832K −54.8% | 686K | $19.4M |
| Rush Island Management, LP Hedge fund | −483K Sold out | 0 | — |
| Baillie Gifford & Co Active manager | −457K −3.4% | 13.2M | $373M |
| Walleye Capital LLC Hedge fund | −404K −75.3% | 133K | $3.8M |
| FMR LLC Active manager | −357K −12.6% | 2.5M | $70.1M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Edgepoint Investment Group Inc.Active manager | 6.0M | $169M |
| Qube Research & Technologies LtdHedge fund | 3.2M | $91.1M |
| United Asset Strategies, Inc. | 489K | $13.8M |
| Jacobs Levy Equity Management, IncActive manager | 441K | $12.5M |
| HRT Financial LP | 425K | $12M |
| Aquatic Capital Management LLC | 222K | $6.3M |
| Catalyst Funds Management Pty Ltd | 158K | $4.5M |
| Point72 Asset Management, L.P.Hedge fund | 131K | $3.7M |
| Apollon Wealth Management, LLC | 124K | $3.5M |
| Acadian Asset Management LLCActive manager | 101K | $2.9M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Tiger Global Management LLCHedge fund | 1.5M | $60.5M |
| Greenhouse Funds LLLP | 1.4M | $55.6M |
| Capitolis Liquid Global Markets LLC | 1.4M | $54.7M |
| Stephens Investment Management Group LLC | 872K | $35.2M |
| Corvex Management LPHedge fund | 852K | $34.4M |
| Timessquare Capital Management, LLC | 796K | $32.1M |
| Rush Island Management, LPHedge fund | 483K | $19.5M |
| Shawspring Partners LLC | 339K | $13.7M |
| Foster Victor Wealth Advisors, LLC | 341K | $12.8M |
| Bsn Capital Partners Ltd | 151K | $11.8M |
Who holds the shares
- Institutions reporting
- 750
- Ten largest holders
- 48.9% of 13F-reported shares
- Index fund managers
- 33.8% of 13F-reported shares
- Active managers and hedge funds
- 31.2% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 44 | 36 | 11 | 8 | +22.2M | +21.0% |
| Index fund managers | 4 | 8 | 0 | 0 | −2.3M | −1.7% |
| Other institutions | 358 | 355 | 94 | 132 | −26.3M | −16.9% |