COST Institutional Ownership & Shareholders
COSTCO WHOLESALE CORP (COST) is currently held by 4,177 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $301.75B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of COST tracked by InsiderSet, reporting ownership valued at approximately $32.00B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $34.62B, representing an estimated gain of +8.21% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed COST value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, State Street Corp, and several other long-term asset managers with concentrated positions in COSTCO WHOLESALE CORP (COST).
This page ranks the largest institutional COST shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
4,177
Total Reported Value
$301.75B
Largest Holder
Blackrock, Inc.
Largest Position
$32.00B
Insider Transactions (90d)
50
Latest Filing Quarter
Q2 2026
New Institutional Positions
19
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.48% | 34,202,834 | $31,995,724,771 | $34,622,844,802 | +$2,627,120,031 | +8.21% | |
| Vanguard Capital Management Llc | 0.58% | 28,976,605 | $27,106,744,680 | $29,332,437,709 | +$2,225,693,029 | +8.21% | |
| State Street Corp | 0.51% | 18,384,951 | $17,198,570,112 | $18,610,718,198 | +$1,412,148,086 | +8.21% | |
| Invesco Ltd. | 1.04% | 13,989,137 | $13,086,417,802 | $14,160,923,602 | +$1,074,505,800 | +8.21% | |
| Geode Capital Management, Llc | 0.53% | 10,627,472 | $9,897,547,914 | $10,757,977,356 | +$860,429,442 | +8.69% | |
| Vanguard Portfolio Management Llc | 0.44% | 10,402,555 | $9,731,278,126 | $10,530,298,375 | +$799,020,249 | +8.21% | |
| Morgan Stanley | 0.51% | 10,220,437 | $9,560,915,932 | $10,345,943,966 | +$785,028,034 | +8.21% | |
| Banque Cantonale Vaudoise | 0.98% | 7,533 | $7,048,000,000 | $7,625,505 | -$7,040,374,495 | -99.89% | |
| Bank Of America Corp | 0.44% | 7,249,774 | $6,781,946,300 | $7,338,801,225 | +$556,854,925 | +8.21% | |
| Norges Bank | 0.60% | 6,474,767 | $6,056,950,285 | $6,554,277,139 | +$497,326,854 | +8.21% | |
| Fmr Llc | 0.25% | 6,163,541 | $5,765,808,022 | $6,239,229,283 | +$473,421,261 | +8.21% | |
| Northern Trust Corp | 0.53% | 4,835,919 | $4,523,857,148 | $4,895,304,085 | +$371,446,937 | +8.21% | |
| Royal Bank Of Canada | 0.68% | 4,292,111 | $4,015,141,000 | $4,344,818,123 | +$329,677,123 | +8.21% | |
| Jpmorgan Chase & Co | 0.23% | 4,224,191 | $3,998,958,933 | $4,276,064,065 | +$277,105,132 | +6.93% | |
| Charles Schwab Investment Management Inc | 0.45% | 3,631,675 | $3,397,323,038 | $3,676,271,969 | +$278,948,931 | +8.21% | |
| Goldman Sachs Group Inc | 0.32% | 3,293,734 | $3,081,189,706 | $3,334,181,054 | +$252,991,348 | +8.21% | |
| Fisher Asset Management, Llc | 0.91% | 3,253,040 | $3,043,122,633 | $3,292,987,331 | +$249,864,698 | +8.21% | |
| Bank Of New York Mellon Corp | 0.49% | 3,215,058 | $3,007,590,298 | $3,254,538,912 | +$246,948,614 | +8.21% | |
| Nuveen, Llc | 0.71% | 3,189,881 | $2,984,037,869 | $3,229,052,739 | +$245,014,870 | +8.21% | |
| Wells Fargo & Company/Mn | 0.51% | 3,106,170 | $2,905,728,904 | $3,144,313,768 | +$238,584,864 | +8.21% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.60% | 2,907,419 | $2,897,039,517 | $2,943,122,105 | +$46,082,588 | +1.59% | |
| Capital International Investors | 0.54% | 2,770,728 | $2,592,012,319 | $2,804,752,540 | +$212,740,221 | +8.21% | |
| Alliancebernstein L.P. | 0.84% | 2,549,000 | $2,539,900,070 | $2,580,301,720 | +$40,401,650 | +1.59% | |
| Ubs Group Ag | 0.40% | 2,675,980 | $2,503,298,861 | $2,708,841,034 | +$205,542,173 | +8.21% | |
| Legal & General Group Plc | 0.49% | 2,525,135 | $2,362,188,046 | $2,556,143,658 | +$193,955,612 | +8.21% | |
| Vanguard Fiduciary Trust Co | 0.52% | 2,516,516 | $2,354,125,222 | $2,547,418,816 | +$193,293,594 | +8.21% | |
| Jennison Associates Llc | 1.22% | 2,166,050 | $2,026,275,259 | $2,192,649,094 | +$166,373,835 | +8.21% | |
| Price T Rowe Associates Inc | 0.19% | 2,063,521 | $1,930,363,000 | $2,088,861,038 | +$158,498,038 | +8.21% | |
| Capital World Investors | 0.23% | 2,043,628 | $1,911,831,457 | $2,068,723,752 | +$156,892,295 | +8.21% | |
| Sg Americas Securities, Llc | 0.95% | 1,773,372 | $1,658,936,000 | $1,795,149,008 | +$136,213,008 | +8.21% | |
| Dimensional Fund Advisors Lp | 0.28% | 1,654,851 | $1,548,184,612 | $1,675,172,570 | +$126,987,958 | +8.20% | |
| Deutsche Bank Ag\ | 0.40% | 1,463,192 | $1,368,772,221 | $1,481,159,998 | +$112,387,777 | +8.21% | |
| American Century Companies Inc | 0.60% | 1,448,226 | $1,354,772,875 | $1,466,010,215 | +$111,237,340 | +8.21% | |
| Bank Of Montreal | 0.49% | 1,434,743 | $1,342,158,914 | $1,452,361,644 | +$110,202,730 | +8.21% | |
| Raymond James Financial Inc | 0.36% | 1,413,102 | $1,321,914,059 | $1,430,454,893 | +$108,540,834 | +8.21% | |
| Ameriprise Financial Inc | 0.25% | 1,339,096 | $1,252,008,256 | $1,355,540,099 | +$103,531,843 | +8.27% | |
| Aqr Capital Management Llc | 0.41% | 1,253,747 | $1,172,842,175 | $1,269,143,013 | +$96,300,838 | +8.21% | |
| Peakshares Llc | 0.87% | 1,252 | $1,171,208,000 | $1,267,375 | -$1,169,940,625 | -99.89% | |
| Swiss National Bank | 0.61% | 1,251,300 | $1,170,553,611 | $1,266,665,964 | +$96,112,353 | +8.21% | |
| Hsbc Holdings Plc | 0.56% | 1,239,037 | $1,160,439,859 | $1,254,252,374 | +$93,812,515 | +8.08% | |
| Principal Financial Group Inc | 0.57% | 1,222,112 | $1,112,538,897 | $1,237,119,535 | +$124,580,638 | +11.20% | |
| Marshall Wace, Llp | 0.93% | 1,174,466 | $1,098,677,711 | $1,188,888,442 | +$90,210,731 | +8.21% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.60% | 1,160,998 | $1,086,033,871 | $1,175,255,055 | +$89,221,184 | +8.22% | |
| Lpl Financial Llc | 0.24% | 1,145,398 | $1,071,485,881 | $1,159,463,487 | +$87,977,606 | +8.21% | |
| Acadian Asset Management Llc | 1.27% | 1,141,108 | $1,067,425,000 | $1,155,120,806 | +$87,695,806 | +8.22% | |
| California Public Employees Retirement System | 0.53% | 1,010,418 | $945,215,726 | $1,022,825,933 | +$77,610,207 | +8.21% | |
| Two Sigma Investments, Lp | 0.71% | 1,006,231 | $941,298,914 | $1,018,587,517 | +$77,288,603 | +8.21% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.54% | 1,032,165 | $939,621,086 | $1,044,839,986 | +$105,218,900 | +11.20% | |
| National Pension Service | 0.58% | 966,727 | $904,344,107 | $978,598,408 | +$74,254,301 | +8.21% | |
| Vanguard Global Advisers, Llc | 0.42% | 957,168 | $895,401,949 | $968,922,023 | +$73,520,074 | +8.21% |
Frequently asked questions about COST
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Who are the largest institutional holders of COST?
The largest institutional holders of COST reported in the latest SEC Form 13F filings include Blackrock, Inc. , Vanguard Capital Management Llc , State Street Corp , Invesco Ltd. , and Geode Capital Management, Llc . InsiderSet ranks institutional holders by their latest reported COST position.
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What is COST institutional ownership?
This page tracks COST positions reported by institutional investment managers through SEC Form 13F. COSTCO WHOLESALE CORP (COST) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
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How many institutions own COST?
InsiderSet currently tracks 4,177 institutional managers reporting COST holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of COST shareholders.
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How much COST stock do institutions own?
Institutional investment managers disclosed approximately $301.75B in COST holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
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When was COST institutional ownership last updated?
The latest COST institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
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Are institutional COST holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its COST position after the reporting date.
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Are institutions buying or selling COST?
Institutional buying and selling can be analyzed by comparing COST positions across consecutive 13F reporting periods. InsiderSet's COST Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View COST ownership changes.
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How has COST institutional ownership changed over time?
InsiderSet tracks COST institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.