Who owns Costco Wholesale (COST)
Which tracked institutional funds hold COST, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See COST company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on COST is one-sided between 2026-Q1 and 2026-Q2: 450 added or opened and 1473 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
COST’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.5% of its own reported 13F book, while the median holder sizes it at 0.5% of theirs — a 0.0pp gap the other way — the median holder sizes COST more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in COST divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 4048 tracked filers holding COST, 1840 increased or opened the position and 2051 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in COST between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 98
- Jupiter Topco LLC$378M
- NewEdge Advisors, LLC$146M
- Holocene Advisors, LP$133M
- Nykredit A/S$130M
- Trexquant Investment LP$117M
- Bristol Gate Capital Partners Inc.$61M
Full exits 263
- Amundi$2.8B
- SG Americas Securities, LLC$815M
- ACADIAN ASSET MANAGEMENT LLC$812M
- BESSEMER GROUP INC$667M
- HighTower Advisors, LLC$433M
- PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO$396M
Largest adds
- Invesco Ltd.$3.8B
- MARSHALL WACE, LLP$836M
- NORGES BANK$752M
- Ninety One UK Ltd$286M
- ROYAL BANK OF CANADA$270M
- MILLENNIUM MANAGEMENT LLC$220M
Largest trims
- BlackRock, Inc.$2.2B
- VANGUARD CAPITAL MANAGEMENT LLC$1.6B
- VANGUARD PORTFOLIO MANAGEMENT LLC$936M
- FMR LLC$929M
- STATE STREET CORP$889M
- BANK OF AMERICA CORP /DE/$706M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 34,202,834 | $32.0B | 13.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 28,976,605 | $27.1B | 11.3% | 2026-Q2 |
| STATE STREET CORP added | 18,384,951 | $17.2B | 7.2% | 2026-Q2 |
| Invesco Ltd. added | 13,989,137 | $13.1B | 5.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 10,627,472 | $9.9B | 4.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 10,402,555 | $9.7B | 4.1% | 2026-Q2 |
| MORGAN STANLEY added | 10,220,437 | $9.6B | 4.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 7,249,774 | $6.8B | 2.8% | 2026-Q2 |
| NORGES BANK added | 6,474,767 | $6.1B | 2.5% | 2026-Q2 |
| FMR LLC trimmed | 6,163,541 | $5.8B | 2.4% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 4,835,919 | $4.5B | 1.9% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 4,292,111 | $4.0B | 1.7% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 4,224,191 | $4.0B | 1.7% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 3,631,675 | $3.4B | 1.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 3,293,734 | $3.1B | 1.3% | 2026-Q2 |
| Fisher Asset Management, LLC added | 3,253,040 | $3.0B | 1.3% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 3,215,058 | $3.0B | 1.3% | 2026-Q2 |
| Nuveen, LLC added | 3,189,881 | $3.0B | 1.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 3,106,170 | $2.9B | 1.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 3,068,312 | $2.9B | 1.2% | 2026-Q2 |
| Capital International Investors added | 2,770,728 | $2.6B | 1.1% | 2026-Q2 |
| UBS Group AG added | 2,675,980 | $2.5B | 1.0% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 2,549,000 | $2.5B | 1.1% | 2026-Q2 |
| Legal & General Group Plc added | 2,525,135 | $2.4B | 1.0% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 2,516,516 | $2.4B | 1.0% | 2026-Q2 |
| JENNISON ASSOCIATES LLC trimmed | 2,166,050 | $2.0B | 0.8% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 2,063,521 | $1.9B | 0.8% | 2026-Q2 |
| Capital World Investors added | 2,043,628 | $1.9B | 0.8% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,654,851 | $1.5B | 0.6% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 1,463,192 | $1.4B | 0.6% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 1,448,226 | $1.4B | 0.6% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 1,434,743 | $1.3B | 0.6% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 1,413,102 | $1.3B | 0.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 1,339,096 | $1.3B | 0.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,253,747 | $1.2B | 0.5% | 2026-Q2 |
| Swiss National Bank trimmed | 1,251,300 | $1.2B | 0.5% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 1,239,037 | $1.2B | 0.5% | 2026-Q2 |
| MARSHALL WACE, LLP added | 1,174,466 | $1.1B | 0.5% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 1,162,963 | $1.1B | 0.5% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 1,160,998 | $1.1B | 0.5% | 2026-Q2 |
| LPL Financial LLC added | 1,145,398 | $1.1B | 0.4% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 1,092,459 | $1.0B | 0.4% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 1,080,484 | $1.0B | 0.4% | 2026-Q2 |
| California Public Employees Retirement System added | 1,010,418 | $945M | 0.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 1,006,231 | $941M | 0.4% | 2026-Q2 |
| National Pension Service added | 966,727 | $904M | 0.4% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 957,168 | $895M | 0.4% | 2026-Q2 |
| BARCLAYS PLC trimmed | 943,080 | $882M | 0.4% | 2026-Q2 |
| Corient Private Wealth LP added | 929,203 | $729M | 0.3% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 916,798 | $858M | 0.4% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 880,718 | $824M | 0.3% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 873,316 | $817M | 0.3% | 2026-Q2 |
| CITIGROUP INC added | 873,116 | $817M | 0.3% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 866,849 | $811M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 786,232 | $735M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 755,150 | $706M | 0.3% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ added | 751,142 | $703M | 0.3% | 2026-Q2 |
| EVERETT HARRIS & CO /CA/ trimmed | 734,529 | $687M | 0.3% | 2026-Q2 |
| TD Asset Management Inc trimmed | 720,407 | $674M | 0.3% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 712,347 | $666M | 0.3% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 695,622 | $651M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 692,107 | $647M | 0.3% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 674,638 | $631M | 0.3% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 670,304 | $627M | 0.3% | 2026-Q2 |
| APG Asset Management N.V. trimmed | 645,893 | $528M | 0.2% | 2026-Q2 |
| Swedbank AB trimmed | 643,428 | $602M | 0.3% | 2026-Q2 |
| PARNASSUS INVESTMENTS, LLC trimmed | 625,050 | $585M | 0.2% | 2026-Q2 |
| PNC Financial Services Group, Inc. trimmed | 624,365 | $584M | 0.2% | 2026-Q2 |
| Emerald Advisors, LLC | 622,528 | $582M | 0.2% | 2026-Q2 |
| Baird Financial Group, Inc. added | 622,012 | $582M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 613,482 | $574M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 531,750 | $498M | 0.2% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL added | 524,692 | $491M | 0.2% | 2026-Q2 |
| US BANCORP \DE\ trimmed | 512,209 | $479M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 509,661 | $477M | 0.2% | 2026-Q2 |
| Bank Julius Baer & Co. Ltd, Zurich trimmed | 486,491 | $456M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 484,439 | $453M | 0.2% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 480,409 | $449M | 0.2% | 2026-Q2 |
| PROVIDENT TRUST CO added | 470,400 | $440M | 0.2% | 2026-Q2 |
| Caisse de depot et placement du Quebec trimmed | 469,190 | $439M | 0.2% | 2026-Q2 |
| Capital Research Global Investors trimmed | 456,174 | $427M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 453,439 | $424M | 0.2% | 2026-Q2 |
| AVIVA PLC added | 444,887 | $416M | 0.2% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 444,473 | $416M | 0.2% | 2026-Q2 |
| Cerity Partners LLC added | 438,863 | $411M | 0.2% | 2026-Q2 |
| Man Group plc added | 437,789 | $410M | 0.2% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 435,937 | $408M | 0.2% | 2026-Q2 |
| Rockefeller Capital Management L.P. added | 432,646 | $405M | 0.2% | 2026-Q2 |
| Williams Jones Wealth Management, LLC. trimmed | 425,262 | $398M | 0.2% | 2026-Q2 |
| Mariner, LLC trimmed | 419,996 | $393M | 0.2% | 2026-Q2 |
| 1832 Asset Management L.P. trimmed | 414,342 | $388M | 0.2% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 413,614 | $387M | 0.2% | 2026-Q2 |
| Jupiter Topco LLC new | 404,467 | $378M | 0.2% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 395,677 | $370M | 0.2% | 2026-Q2 |
| Chevy Chase Trust Holdings, LLC trimmed | 389,886 | $365M | 0.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 380,749 | $356M | 0.1% | 2026-Q2 |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC trimmed | 379,720 | $355M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 379,139 | $355M | 0.1% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 374,507 | $355M | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 361,307 | $338M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.