Costco: which funds bought and sold
Institutions that bought and sold Costco 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, 1,849 institutions that filed 13F reports for both quarters added to or opened positions in Costco, and 1,852 cut or closed them. Together they sold a net 2.7M shares, −0.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 493K shares (−1.2%); index fund managers were net sellers of 788K shares (−0.7%). 137 opened a new position and 158 sold out entirely.
Bought, Q2 2026 1,849 institutions, 137 of them new holders Sold, Q2 2026 1,852 institutions, 158 of them sold out
Net change, all compared −2.7M shares (−0.9%)
Net change, active managers −493K shares (−1.2%), 46 bought, 77 sold
Buyers versus sellers
1,849 bought 571 1,852 sold
Active managers and hedge funds 46 bought · 77 sold · −493K
Index fund managers 4 bought · 8 sold · −788K
Other institutions 1,799 bought · 1,767 sold · −1.4M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| SG Americas Securities, LLC | +956K +116.9% | 1.8M | $1.7B |
| Marshall Wace, LLP Hedge fund | +911K +345.3% | 1.2M | $1.1B |
| Assenagon Asset Management S.A. | +831K +163.0% | 1.3M | $1.3B |
| Everett Harris & Co | +735K New position | 735K | $687M |
| Royal Bank Of Canada | +533K +14.2% | 4.3M | $4B |
| Invesco Ltd. | +360K +2.6% | 14.0M | $13.1B |
| Acadian Asset Management LLC Active manager | +326K +40.0% | 1.1M | $1.1B |
| Morgan Stanley | +322K +3.3% | 10.2M | $9.6B |
| Ninety One Uk Ltd | +306K +151372.8% | 306K | $286M |
| Citigroup Inc | +268K +44.3% | 873K | $817M |
| Millennium Management LLC Hedge fund | +244K +178.9% | 381K | $356M |
| HRT Financial LP | +242K +290.0% | 325K | $304M |
| State Street Corp Index funds | +233K +1.3% | 18.4M | $17.2B |
| Charles Schwab Investment Management Inc Index funds | +231K +6.8% | 3.6M | $3.4B |
| AQR Capital Management LLC Hedge fund | +226K +22.0% | 1.3M | $1.2B |
| Susquehanna International Group, LLP | +213K +143.9% | 361K | $338M |
| UBS Group AG | +196K +7.9% | 2.7M | $2.5B |
| Steadfast Capital Management LP Hedge fund | +193K +474.4% | 234K | $219M |
| Jpmorgan Chase & Co | +184K +4.6% | 4.2M | $4B |
| UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC | +161K +5.5% | 3.1M | $2.9B |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Marshall Wace, LLP Hedge fund | +911K +345.3% | 1.2M | $1.1B |
| Acadian Asset Management LLC Active manager | +326K +40.0% | 1.1M | $1.1B |
| Millennium Management LLC Hedge fund | +244K +178.9% | 381K | $356M |
| AQR Capital Management LLC Hedge fund | +226K +22.0% | 1.3M | $1.2B |
| Steadfast Capital Management LP Hedge fund | +193K +474.4% | 234K | $219M |
| Balyasny Asset Management L.P. Hedge fund | +159K +109.5% | 304K | $284M |
| Holocene Advisors, LP Hedge fund | +143K New position | 143K | $133M |
| Two Sigma Investments, LP Hedge fund | +131K +15.0% | 1.0M | $941M |
| Trexquant Investment LP Hedge fund | +125K New position | 125K | $117M |
| Qube Research & Technologies Ltd Hedge fund | +106K +58.4% | 286K | $268M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Diamant Asset Management, Inc. | −6.7M −99.9% | 6,751 | $6.3M |
| Blackrock, Inc. Index funds | −744K −2.1% | 34.2M | $32B |
| FMR LLC Active manager | −555K −8.3% | 6.2M | $5.8B |
| Price T Rowe Associates Inc Active manager | −513K −19.9% | 2.1M | $1.9B |
| Amundi | −415K −14.6% | 2.4M | $2.3B |
| American Century Companies Inc Active manager | −358K −19.8% | 1.4M | $1.4B |
| Vanguard Portfolio Management LLC Index funds | −303K −2.8% | 10.4M | $9.7B |
| Franklin Resources Inc Active manager | −276K −19.2% | 1.2M | $1.1B |
| Voya Investment Management LLC | −274K −39.9% | 414K | $387M |
| Bank Of America Corp | −265K −3.5% | 7.2M | $6.8B |
| Rathbones Group PLC | −253K −53.7% | 219K | $204M |
| Alliancebernstein L.P. Active manager | −217K −7.9% | 2.5M | $2.5B |
| TD Asset Management Inc | −217K −23.1% | 720K | $674M |
| Bank Of New York Mellon Corp | −177K −5.2% | 3.2M | $3B |
| Point72 Asset Management, L.P. Hedge fund | −156K Sold out | 0 | — |
| Capital Research Global Investors Active manager | −151K −24.9% | 456K | $427M |
| Proshare Advisors LLC Index funds | −147K −23.5% | 480K | $449M |
| Jennison Associates LLC Active manager | −146K −6.3% | 2.2M | $2B |
| Barclays PLC | −124K −11.6% | 943K | $882M |
| APG Asset Management N.V. | −114K −15.0% | 646K | $528M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | −555K −8.3% | 6.2M | $5.8B |
| Price T Rowe Associates Inc Active manager | −513K −19.9% | 2.1M | $1.9B |
| American Century Companies Inc Active manager | −358K −19.8% | 1.4M | $1.4B |
| Franklin Resources Inc Active manager | −276K −19.2% | 1.2M | $1.1B |
| Alliancebernstein L.P. Active manager | −217K −7.9% | 2.5M | $2.5B |
| Point72 Asset Management, L.P. Hedge fund | −156K Sold out | 0 | — |
| Capital Research Global Investors Active manager | −151K −24.9% | 456K | $427M |
| Jennison Associates LLC Active manager | −146K −6.3% | 2.2M | $2B |
| Squarepoint Ops LLC Hedge fund | −113K −49.4% | 116K | $108M |
| Voloridge Investment Management, LLC Hedge fund | −112K −39.4% | 173K | $162M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Everett Harris & Co | 735K | $687M |
| Holocene Advisors, LPHedge fund | 143K | $133M |
| Trexquant Investment LPHedge fund | 125K | $117M |
| Bristol Gate Capital Partners Inc. | 65K | $60.7M |
| Bsn Capital Partners Ltd | 50K | $48.1M |
| Mutual Of America Capital Management LLC | 46K | $43.5M |
| Optiver Holding B.V. | 39K | $36.8M |
| Liontrust Investment Partners LLPActive manager | 29K | $27.2M |
| Trans-Canada Capital Inc. | 23K | $21.1M |
| Sienna Gestion | 13K | $12.3M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Point72 Asset Management, L.P.Hedge fund | 156K | $155M |
| Private Advisor Group, LLC | 76K | $75.7M |
| Jain Global LLCHedge fund | 33K | $32.9M |
| Renaissance Technologies LLCHedge fund | 19K | $19.4M |
| Capital Fund Management S.A.Hedge fund | 19K | $19.2M |
| Prana Capital Management, LPHedge fund | 16K | $16.1M |
| Qsemble Capital Management, LP | 15K | $14.8M |
| Chapman Investment Management, LLC | 14K | $14.4M |
| Walleye Trading LLC | 13K | $12.8M |
| Plato Investment Management Ltd | 13K | $12.5M |
Who holds the shares
- Institutions reporting
- 4,182
- Ten largest holders
- 45.5% of 13F-reported shares
- Index fund managers
- 35.6% of 13F-reported shares
- Active managers and hedge funds
- 12.2% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 46 | 77 | 5 | 12 | −493K | −1.2% |
| Index fund managers | 4 | 8 | 0 | 0 | −788K | −0.7% |
| Other institutions | 1,799 | 1,767 | 132 | 146 | −1.4M | −0.9% |