COSTCO WHOLESALE CORPORATION (COST)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
Institutions report 324,835,149 shares against 443,478,804 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $32.0B | 34,202,834 | 0.48% | 8q | -2.1%-$696.2M |
| VANGUARD CAPITAL MANAGEMENT LLC | $27.1B | 28,976,605 | 0.58% | 2q | HELD |
| STATE STREET CORP | $17.2B | 18,384,951 | 0.51% | 31q | +1.3%+$217.7M |
| Invesco Ltd. | $13.1B | 13,989,137 | 1.04% | 31q | +2.6%+$336.7M |
| GEODE CAPITAL MANAGEMENT, LLC | $9.9B | 10,627,472 | 0.53% | 31q | HELD |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $9.7B | 10,402,555 | 0.44% | 2q | -2.8%-$283.5M |
| MORGAN STANLEY | $9.6B | 10,220,437 | 0.51% | 35q | +3.3%+$301.0M |
| BANK OF AMERICA CORP /DE/ | $6.8B | 7,249,774 | 0.44% | 31q | -3.5%-$248.1M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $6.3B incl. $5.9B options CALL+PUT | 361,307 | 0.49% | 31q | +143.9%+$3.7B |
| NORGES BANK | $6.1B | 6,474,767 | 0.60% | 32q | +7.5%+$420.9M |
| FMR LLC | $5.8B | 6,163,541 | 0.25% | 31q | -8.3%-$519.2M |
| NORTHERN TRUST CORP | $4.5B | 4,835,919 | 0.53% | 31q | -1.9%-$86.2M |
| JPMORGAN CHASE & CO | $4.3B incl. $281.9M options CALL+PUT | 4,224,191 | 0.24% | 31q | +4.6%+$186.7M |
| ROYAL BANK OF CANADA | $4.1B incl. $47.9M options CALL+PUT | 4,292,111 | 0.61% | 31q | +14.2%+$504.8M |
| CITADEL ADVISORS LLC | $3.4B incl. $2.9B options CALL+PUT | 509,661 | 0.39% | 31q | -6.4%-$234.8M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $3.4B | 3,631,675 | 0.45% | 31q | +6.8%+$216.4M |
| GOLDMAN SACHS GROUP INC | $3.4B incl. $300.9M options CALL+PUT | 3,293,734 | 0.29% | 31q | +2.5%+$82.1M |
| Fisher Asset Management, LLC | $3.0B | 3,253,040 | 0.91% | 31q | +1.0%+$31.0M |
| Bank of New York Mellon Corp | $3.0B | 3,215,058 | 0.49% | 31q | -5.2%-$165.2M |
| Nuveen, LLC | $3.0B | 3,189,881 | 0.71% | 6q | +3.8%+$108.3M |
| WELLS FARGO & COMPANY/MN | $2.9B incl. $654.8K options PUT | 3,106,170 | 0.47% | 31q | HELD |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $2.9B | 3,068,312 | 0.52% | 31q | +5.5%+$150.5M |
| JANE STREET GROUP, LLC | $2.8B incl. $2.8B options CALL+PUT | 61,569 | 0.23% | 31q | +100.8%+$1.4B |
| UBS Group AG | $2.7B incl. $159.5M options CALL+PUT | 2,675,980 | 0.34% | 31q | +7.9%+$194.6M |
| Capital International Investors | $2.6B | 2,770,728 | 0.54% | 31q | +0.8%+$19.8M |
| ALLIANCEBERNSTEIN L.P. | $2.5B | 2,549,000 | 0.84% | 31q | -7.9%-$216.5M |
| Legal & General Group Plc | $2.4B | 2,525,135 | 0.49% | 31q | +0.8%+$19.6M |
| VANGUARD FIDUCIARY TRUST CO | $2.4B | 2,516,516 | 0.52% | 2q | -1.7%-$41.8M |
| Amundi | $2.3B | 2,424,461 | 0.55% | 21q | -14.6%-$387.8M |
| JENNISON ASSOCIATES LLC | $2.0B | 2,166,050 | 1.22% | 31q | -6.3%-$136.9M |
| IMC-Chicago, LLC | $1.9B incl. $1.9B options CALL+PUT | 92,816 | 0.46% | 19q | +112.9%+$1.0B |
| PRICE T ROWE ASSOCIATES INC /MD/ | $1.9B | 2,063,521 | 0.19% | 31q | -19.9%-$479.4M |
| Capital World Investors | $1.9B | 2,043,628 | 0.23% | 31q | HELD |
| SG Americas Securities, LLC | $1.7B incl. $2.6M options CALL+PUT | 1,773,372 | 0.93% | 31q | +116.9%+$895.7M |
| DIMENSIONAL FUND ADVISORS LP | $1.5B | 1,654,851 | 0.28% | 31q | -1.8%-$27.9M |
| BANK OF MONTREAL /CAN/ | $1.4B incl. $42.3M options PUT | 1,434,743 | 0.46% | 31q | +4.7%+$62.5M |
| DEUTSCHE BANK AG\ | $1.4B | 1,463,192 | 0.40% | 34q | +8.1%+$102.7M |
| AMERICAN CENTURY COMPANIES INC | $1.4B | 1,448,226 | 0.60% | 31q | -19.8%-$335.1M |
| RAYMOND JAMES FINANCIAL INC | $1.3B incl. $410.0K options PUT | 1,413,102 | 0.36% | 7q | +0.7%+$8.7M |
| Assenagon Asset Management S.A. | $1.3B | 1,340,608 | 0.78% | 31q | +163.0%+$777.3M |
| AMERIPRISE FINANCIAL INC | $1.3B | 1,339,096 | 0.25% | 31q | -7.4%-$100.0M |
| AQR CAPITAL MANAGEMENT LLC | $1.2B | 1,253,747 | 0.41% | 31q | +22.0%+$211.5M |
| HSBC HOLDINGS PLC | $1.2B incl. $11.5M options CALL+PUT | 1,239,037 | 0.49% | 31q | +14.0%+$144.0M |
| PeakShares LLC | $1.2B | 1,252,000 | 0.87% | 3q | +107645.3%+$1.2B |
| Swiss National Bank | $1.2B | 1,251,300 | 0.61% | 31q | -3.9%-$48.0M |
| CITIGROUP INC | $1.1B incl. $307.2M options CALL+PUT | 873,116 | 0.37% | 31q | +44.3%+$345.1M |
| MARSHALL WACE, LLP | $1.1B incl. $280.6K options CALL | 1,174,466 | 0.87% | 31q | +345.3%+$852.2M |
| FRANKLIN RESOURCES INC | $1.1B | 1,162,963 | 0.24% | 31q | -19.2%-$258.0M |
| Mitsubishi UFJ Asset Management Co., Ltd. | $1.1B | 1,160,998 | 0.60% | 31q | +7.7%+$77.7M |
| BARCLAYS PLC | $1.1B incl. $190.0M options CALL+PUT | 943,080 | 0.21% | 31q | -11.6%-$140.9M |
| LPL Financial LLC | $1.1B | 1,145,398 | 0.24% | 31q | +2.9%+$30.2M |
| ACADIAN ASSET MANAGEMENT LLC | $1.1B | 1,141,108 | 1.27% | 31q | +40.0%+$304.8M |
| PRINCIPAL FINANCIAL GROUP INC | $1.0B | 1,092,459 | 0.50% | 31q | -4.2%-$45.1M |
| Sumitomo Mitsui Trust Group, Inc. | $1.0B | 1,080,484 | 0.58% | 31q | +2.9%+$28.5M |
| D. E. Shaw & Co., Inc. | $964.1M incl. $147.1M options CALL+PUT | 873,316 | 0.46% | 31q | -1.3%-$13.1M |
| NATIONAL BANK OF CANADA /FI/ | $962.7M incl. $260.1M options CALL+PUT | 751,142 | 0.69% | 19q | +13.5%+$114.2M |
| TWO SIGMA INVESTMENTS, LP | $948.6M incl. $7.3M options CALL+PUT | 1,006,231 | 0.69% | 14q | +15.0%+$123.9M |
| California Public Employees Retirement System | $945.2M | 1,010,418 | 0.53% | 31q | +7.3%+$64.3M |
| MILLENNIUM MANAGEMENT LLC | $912.8M incl. $556.6M options CALL+PUT | 380,749 | 0.33% | 31q | +178.9%+$585.5M |
| National Pension Service | $904.3M | 966,727 | 0.58% | 31q | +3.6%+$31.0M |
| Vanguard Global Advisers, LLC | $895.4M | 957,168 | 0.42% | 2q | -1.4%-$13.1M |
| CANADA PENSION PLAN INVESTMENT BOARD | $857.6M | 916,798 | 0.47% | 31q | +4.6%+$38.0M |
| BNP PARIBAS FINANCIAL MARKETS | $844.9M incl. $197.5M options CALL+PUT | 692,107 | 0.29% | 31q | +25.1%+$169.4M |
| NEUBERGER BERMAN GROUP LLC | $823.9M | 880,718 | 0.55% | 31q | -1.3%-$10.8M |
| VANGUARD ASSET MANAGEMENT, Ltd | $810.9M | 866,849 | 0.55% | 2q | +12.2%+$88.4M |
| RHUMBLINE ADVISERS | $735.5M | 786,232 | 0.55% | 31q | -3.7%-$28.0M |
| FIRST TRUST ADVISORS LP | $706.4M | 755,150 | 0.42% | 31q | +9.1%+$58.8M |
| Corient Private Wealth LP | $706.0M | 754,706 | 0.98% | 15q | -0.6%-$4.0M |
| EVERETT HARRIS & CO /CA/ | $687.1M | 734,529 | 8.44% | 31q | -5.6%-$40.4M |
| TD Asset Management Inc | $673.9M | 720,407 | 0.58% | 31q | -23.1%-$202.8M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $666.4M | 712,347 | 0.67% | 31q | +1.0%+$6.7M |
| STIFEL FINANCIAL CORP | $650.9M | 695,622 | 0.54% | 31q | -1.0%-$6.8M |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $631.1M | 674,638 | 0.58% | 31q | -1.8%-$11.7M |
| BESSEMER GROUP INC | $621.1M | 663,996 | 0.85% | 31q | -0.9%-$5.4M |
| Swedbank AB | $601.9M | 643,428 | 0.52% | 21q | HELD |
| PARNASSUS INVESTMENTS, LLC | $584.7M | 625,050 | 1.56% | 29q | -7.5%-$47.2M |
| PNC Financial Services Group, Inc. | $584.1M | 624,365 | 0.29% | 31q | -1.0%-$6.0M |
| Emerald Advisors, LLC | $582.4M | 622,528 | 73.18% | 27q | HELD |
| Baird Financial Group, Inc. | $581.9M | 622,012 | 0.80% | 31q | +1.1%+$6.4M |
| ENVESTNET ASSET MANAGEMENT INC | $573.9M | 613,482 | 0.14% | 31q | -0.6%-$3.4M |
| CTC LLC | $559.7M CALL+PUT | options only | 0.18% | new | OPTIONS |
| APG Asset Management N.V. | $528.5M | 645,893 | 1.30% | 31q | -15.0%-$93.3M |
| Optiver Holding B.V. | $504.2M incl. $467.4M options CALL+PUT | 39,344 | 0.14% | 16q | HELD |
| Walleye Trading LLC | $499.7M CALL+PUT | options only | 0.57% | 31q | OPTIONS |
| Russell Investments Group, Ltd. | $498.4M | 531,750 | 0.44% | 31q | +14.8%+$64.1M |
| BLAIR WILLIAM & CO/IL | $490.8M | 524,692 | 1.28% | 31q | +0.7%+$3.2M |
| Balyasny Asset Management L.P. | $487.7M incl. $203.3M options CALL+PUT | 304,003 | 0.61% | 18q | +109.5%+$254.9M |
| US BANCORP \DE\ | $479.2M | 512,209 | 0.52% | 31q | HELD |
| Bank Julius Baer & Co. Ltd, Zurich | $456.2M | 486,491 | 1.18% | 26q | -0.7%-$3.4M |
| NEW YORK STATE COMMON RETIREMENT FUND | $453.2M | 484,439 | 0.57% | 31q | -5.1%-$24.1M |
| ProShare Advisors LLC | $449.4M | 480,409 | 0.65% | 31q | -23.5%-$137.7M |
| PROVIDENT TRUST CO | $440.0M | 470,400 | 9.22% | 31q | HELD |
| Caisse de depot et placement du Quebec | $438.9M | 469,190 | 0.63% | 31q | -6.1%-$28.5M |
| Capital Research Global Investors | $426.7M | 456,174 | 0.06% | 31q | -24.9%-$141.3M |
| FEDERATED HERMES, INC. | $424.2M | 453,439 | 0.61% | 31q | -8.1%-$37.4M |
| Man Group plc | $421.5M incl. $12.0M options CALL+PUT | 437,789 | 0.67% | 31q | +22.4%+$77.1M |
| HighTower Advisors, LLC | $419.4M | 448,285 | 0.40% | 31q | +3.1%+$12.5M |
| AVIVA PLC | $416.2M | 444,887 | 0.61% | 31q | +1.1%+$4.3M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $415.8M | 444,473 | 0.32% | 31q | +24.4%+$81.7M |
| Cerity Partners LLC | $410.7M incl. $187.1K options PUT | 438,863 | 0.50% | 31q | +1.2%+$4.9M |
Showing the largest 100 of 4,288 reported holders. The count of 4,283 above leaves out 5 positions whose reported value failed our price check; they are listed here as filed.
Q2 2026 in brief
In Q2 2026, 4,283 managers that file Form 13F reported holding Costco Wholesale Corporation (COST), $322.9B in all, or about 73% of the shares outstanding. 201 managers opened a position and 208 sold out completely, against 4,290 holders the quarter before. Largest holders: Blackrock, Inc., Vanguard Capital Management Llc and State Street Corp. Largest new positions: Ctc Llc ($559.7M), Holocene Advisors, Lp ($133.4M) and Trexquant Investment Lp ($116.9M).
Q2 2026 is the latest quarter whose 13F deadline has passed. A 13F shows long US stock positions at quarter end, filed up to 45 days later; an adviser and a sub-adviser can both report the same shares.
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-10-16 | 2026-10-13 | Directors or officers departed or appointed | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-29 | Adamo Claudine | Executive Vice President | Sold | 2,200 | $2.0M |
| 2026-10-13 | Wilcox William Richard | Executive Vice President | Sold | 1,100 | $1.1M |
| 2026-06-23 | DENMAN KENNETH D | Director | Sold | 885 | $847.3K |
| 2026-09-29 | Frates Caton | Sr. Executive Vice President | Sold | 801 | $733.3K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 1,846 | $18.7B | 20,655,895 | 39 | 594 | 721 | 0.1% |
| Q2 2026 | 4,283 | $322.9B | 324,835,149 | 147 | 1,535 | 1,534 | 5.9% |
| Q1 2026 | 4,290 | $326.6B | 313,797,505 | 255 | 1,610 | 1,497 | 4.5% |
| Q4 2025 | 4,149 | $290.3B | 323,342,862 | 122 | 1,426 | 1,503 | 5.6% |
| Q3 2025 | 3,954 | $297.1B | 300,262,423 | 122 | 1,449 | 1,409 | 6.5% |
| Q2 2025 | 4,025 | $322.5B | 309,783,069 | 162 | 1,564 | 1,340 | 5.0% |
| Q1 2025 | 3,974 | $305.6B | 305,121,232 | 158 | 1,418 | 1,546 | 5.5% |
| Q4 2024 | 3,962 | $301.3B | 307,079,084 | 128 | 1,321 | 1,293 | 6.6% |
| Q3 2024 | 3,604 | $289.2B | 305,671,721 | 140 | 1,289 | 1,283 | 6.3% |
| Q2 2024 | 3,545 | $278.2B | 309,866,079 | 196 | 1,271 | 1,248 | 5.5% |
| Q1 2024 | 3,439 | $255.1B | 326,538,772 | 168 | 1,269 | 1,232 | 6.3% |
| Q4 2023 | 3,372 | $224.4B | 317,934,208 | 159 | 1,190 | 1,080 | 6.3% |
| Q3 2023 | 3,096 | $179.1B | 301,857,302 | 124 | 1,081 | 1,031 | 4.8% |
| Q2 2023 | 3,054 | $170.4B | 302,024,910 | 173 | 1,064 | 1,013 | 4.6% |
| Q1 2023 | 2,955 | $161.9B | 311,485,672 | 155 | 1,087 | 966 | 4.4% |
| Q4 2022 | 2,944 | $148.8B | 308,765,276 | 115 | 983 | 1,061 | 5.3% |
| Q3 2022 | 2,799 | $701.1B | 1,578,463,291 | 129 | 1,053 | 926 | 1.2% |
| Q2 2022 | 2,777 | $746.5B | 1,861,023,378 | 106 | 1,017 | 1,031 | 1.0% |
| Q1 2022 | 2,852 | $787.3B | 1,627,607,957 | 154 | 1,035 | 998 | 1.1% |
| Q4 2021 | 2,817 | $707.4B | 1,538,735,579 | 205 | 932 | 860 | 2.0% |
| Q3 2021 | 2,457 | $584.7B | 1,491,057,678 | 151 | 821 | 824 | 1.4% |
| Q2 2021 | 2,387 | $519.3B | 1,516,604,462 | 130 | 925 | 738 | 1.2% |
| Q1 2021 | 2,341 | $482.3B | 1,530,226,529 | 116 | 1,029 | 718 | 1.5% |
| Q4 2020 | 2,355 | $425.5B | 1,203,457,042 | 113 | 925 | 684 | 2.3% |
| Q3 2020 | 2,164 | $428.4B | 1,530,045,332 | 144 | 801 | 711 | 1.7% |
| Q2 2020 | 2,080 | $322.2B | 1,415,718,602 | 152 | 848 | 682 | 1.3% |
| Q1 2020 | 2,052 | $349.2B | 1,381,608,421 | 156 | 785 | 745 | 1.1% |
| Q4 2019 | 2,001 | $314.6B | 1,237,539,348 | 88 | 710 | 568 | 1.2% |
| Q3 2019 | 1,823 | $286.4B | 1,198,234,238 | 124 | 622 | 643 | 1.3% |
| Q2 2019 | 1,753 | $259.4B | 1,247,280,954 | 118 | 589 | 571 | 1.5% |
| Q1 2019 | 1,712 | $255.5B | 1,415,218,050 | 120 | 653 | 519 | 2.4% |
| Q4 2018 | 1,665 | $234.2B | 1,293,368,932 | 13 | 27 | 27 | 1.7% |