COST Costco Wholesale Corporation
Costco Wholesale Corporation (COST) Institutional Ownership
What the institutions did with COST last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 10.8M | 17.1% |
| Fisher Asset Management, LLC | 3.3M | 5.2% |
| Amundi | 3.2M | 5.1% |
| Bank of New York Mellon Corp | 3.1M | 4.9% |
| DIMENSIONAL FUND ADVISORS LP | 1.6M | 2.6% |
| DEUTSCHE BANK AG\ | 1.6M | 2.6% |
| Mitsubishi UFJ Asset Management Co., Ltd. | 1.2M | 1.9% |
| PRINCIPAL FINANCIAL GROUP INC | 1.2M | 1.9% |
| LPL Financial LLC | 1.2M | 1.9% |
| BARCLAYS PLC | 1.1M | 1.7% |
| Sumitomo Mitsui Trust Group, Inc. | 1.0M | 1.6% |
| CITIGROUP INC | 821.5K | 1.3% |
| EVERETT HARRIS & CO /CA/ | 731.9K | 1.2% |
| Swedbank AB | 660.7K | 1.0% |
| Emerald Advisors, LLC | 616.3K | 1.0% |
| PNC Financial Services Group, Inc. | 612.2K | 1.0% |
| PARNASSUS INVESTMENTS, LLC | 559.7K | 0.9% |
| US BANCORP \DE\ | 510.6K | 0.8% |
| Assenagon Asset Management S.A. | 501.3K | 0.8% |
| ProShare Advisors LLC | 497.3K | 0.8% |
| Bank Julius Baer & Co. Ltd, Zurich | 492.1K | 0.8% |
| Russell Investments Group, Ltd. | 440.7K | 0.7% |
| Williams Jones Wealth Management, LLC. | 419.6K | 0.7% |
| NEOS Investment Management LLC | 379.1K | 0.6% |
| Aberdeen Group plc | 344.9K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Assenagon Asset Management S.A. | Reduced | 1.3M | 501.3K | -839.3K |
| Amundi | Increased | 2.4M | 3.2M | +778.6K |
| Alphinity Investment Management Pty Ltd | Sold Out | 221.1K | 0 | -221.1K |
| DEUTSCHE BANK AG\ | Increased | 1.5M | 1.6M | +160.5K |
| BARCLAYS PLC | Increased | 943.1K | 1.1M | +157.6K |
| Robeco Institutional Asset Management B.V. | Reduced | 346.8K | 191.7K | -155.1K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 10.6M | 10.8M | +142.1K |
| Cambridge Investment Research Advisors, Inc. | Reduced | 277.4K | 137.6K | -139.9K |
| PROVIDENT TRUST CO | Reduced | 470.4K | 332.5K | -137.9K |
| PRINCIPAL FINANCIAL GROUP INC | Increased | 1.1M | 1.2M | +129.7K |
| Bank of New York Mellon Corp | Reduced | 3.2M | 3.1M | -115.1K |
| Achmea Investment Management B.V. | Increased | 33.0K | 144.7K | +111.7K |
| Ninety One UK Ltd | Reduced | 306.0K | 206.2K | -99.8K |
| IMC-Chicago, LLC | Sold Out | 92.8K | 0 | -92.8K |
| Russell Investments Group, Ltd. | Reduced | 531.8K | 440.7K | -91.1K |
| DekaBank Deutsche Girozentrale | Reduced | 280.2K | 198.1K | -82.1K |
| Cardano Risk Management B.V. | Increased | 187.0K | 254.6K | +67.6K |
| Mitsubishi UFJ Asset Management Co., Ltd. | Increased | 1.2M | 1.2M | +66.3K |
| PARNASSUS INVESTMENTS, LLC | Reduced | 625.1K | 559.7K | -65.4K |
| KBC Group NV | Increased | 134.5K | 186.2K | +51.7K |
| CITIGROUP INC | Reduced | 873.1K | 821.5K | -51.7K |
| BSN CAPITAL PARTNERS Ltd | Sold Out | 50.0K | 0 | -50.0K |
| NEOS Investment Management LLC | Increased | 330.8K | 379.1K | +48.3K |
| Sumitomo Mitsui Trust Group, Inc. | Reduced | 1.1M | 1.0M | -48.3K |
| AGF MANAGEMENT LTD | Reduced | 117.1K | 69.1K | -48.0K |
| Vontobel Holding Ltd. | Reduced | 70.0K | 28.8K | -41.2K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Reduced | 62.9K | 21.8K | -41.1K |
| Fisher Asset Management, LLC | Increased | 3.3M | 3.3M | +38.6K |
| LBP AM SA | Reduced | 64.3K | 26.2K | -38.0K |
| Swiss Life Asset Management Ltd | Increased | 141.1K | 177.9K | +36.8K |
| Annex Advisory Services, LLC | Reduced | 38.7K | 6.1K | -32.6K |
| TD Waterhouse Canada Inc. | Reduced | 333.0K | 300.7K | -32.3K |
| Mirae Asset Global Investments Co., Ltd. | Increased | 287.6K | 319.0K | +31.4K |
| Candriam S.C.A. | Increased | 51.8K | 82.7K | +30.9K |
| Jefferies Financial Group Inc. | Increased | 54.7K | 84.4K | +29.7K |
| LPL Financial LLC | Increased | 1.1M | 1.2M | +28.5K |
| BI Asset Management Fondsmaeglerselskab A/S | Reduced | 122.3K | 97.0K | -25.3K |
| Smith Group Asset Management, LLC | Reduced | 66.2K | 41.4K | -24.8K |
| INVESTMENT HOUSE LLC | Reduced | 62.3K | 38.8K | -23.5K |
| Allspring Global Investments Holdings, LLC | Increased | 185.0K | 207.8K | +22.8K |
| Pictet Asset Management Holding SA | Increased | 322.3K | 343.6K | +21.3K |
| ADAMS DIVERSIFIED EQUITY FUND, INC. | Increased | 13.7K | 34.9K | +21.2K |
| Y-Intercept (Hong Kong) Ltd | Reduced | 23.7K | 2.6K | -21.1K |
| TRUIST FINANCIAL CORP | Reduced | 250.2K | 229.4K | -20.8K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Reduced | 199.4K | 179.6K | -19.7K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Increased | 117.0K | 136.6K | +19.6K |
| Concurrent Investment Advisors, LLC | Increased | 22.8K | 41.3K | +18.5K |
| Eurizon Capital SGR S.p.A. | Reduced | 95.5K | 77.1K | -18.4K |
| West Wealth Group, LLC | Increased | 777 | 18.9K | +18.1K |
| KEYBANK NATIONAL ASSOCIATION/OH | Reduced | 326.6K | 308.9K | -17.7K |
| Swedbank AB | Increased | 643.4K | 660.7K | +17.3K |
| OP Asset Management Ltd | Increased | 66.7K | 84.0K | +17.3K |
| ProShare Advisors LLC | Increased | 480.4K | 497.3K | +16.9K |
| JAG CAPITAL MANAGEMENT, LLC | Reduced | 32.2K | 15.3K | -16.9K |
| CenterBook Partners LP | New | 0 | 16.4K | +16.4K |
| Savant Capital, LLC | Increased | 26.0K | 42.0K | +15.9K |
| COMMONWEALTH EQUITY SERVICES, LLC | Reduced | 341.6K | 326.3K | -15.3K |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | Reduced | 339.2K | 323.9K | -15.3K |
| NICHOLAS COMPANY, INC. | Reduced | 84.5K | 69.3K | -15.2K |
| MEITAV INVESTMENT HOUSE LTD | Increased | 43.1K | 58.1K | +15.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.