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Smart Money Score
Composite context from Form 4, 13F and congressional disclosures; not a forecast.
Holder clone rankings through .
Of the 21 tracked institutions holding COST, 11 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: -2.1pt. It's a gauge of who owns the name, not just how many.
Among the 21 tracked institutional investors we monitor, COST (COSTCO WHSL CORP NEW) is held with a combined value of $100.95B across 111,352,969 shares. The largest holder is VANGUARD GROUP INC with a position worth $37.62B (0.55% of their portfolio). ARMISTICE CAPITAL, LLC opened a new position in the most recent quarter. 6 funds increased their holdings. 13 funds reduced their position.
Total Institutional Value
$100.95B
Total Shares Held
111,352,969
Institutional Holders
21
% of Shares Outstanding
25.1%
of 443.13M shares · SEC 2026-09-29
Days to Cover
2.7-0.5%
7.33M shares short · FINRA 2026-09-30
Tracked 13F institutions hold 25.1% of COST's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-09-29), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
10
$10.14M
Total Transactions
10
the last 365 days
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Oct 13, 2026 | William Richard Wilcox | S | Sale | 1,100 | $1.05M |
| Sep 29, 2026 | Claudine Adamo | S | Sale | 2,200 | $2.02M |
| Sep 29, 2026 | Caton Frates | S | Sale | 800 | $732.74K |
| Jun 23, 2026 | KENNETH D DENMAN | S | Sale | 885 | $847.35K |
| Apr 1, 2026 | Caton Frates | S | Sale | 700 | $695.10K |
| Mar 9, 2026 | Claudine Adamo | S | Sale | 730 | $732.21K |
| Jan 21, 2026 | Teresa A. Jones | S | Sale | 850 | $838.32K |
| Jan 16, 2026 | SUSAN L DECKER | S | Sale | 458 | $437.39K |
| Jan 14, 2026 | James C Klauer | S | Sale | 1,500 | $1.41M |
| Jan 9, 2026 | Russell D Miller | S | Sale | 1,500 | $1.37M |
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $37.62B | 0.55% | +0.4% |
| 2 | BlackRock, Inc. | $32.00B | 0.48% | -2.1% |
| 3 | STATE STREET CORP | $17.20B | 0.51% | +1.3% |
| 4 | FMR LLC | $5.77B | 0.25% | -8.3% |
| 5 | Fisher Asset Management, LLC | $3.04B | 0.91% | +1.0% |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.93B | 0.19% | -19.9% |
| 7 | AQR CAPITAL MANAGEMENT LLC | $1.17B | 0.41% | +22.0% |
| 8 | CITADEL ADVISORS LLC | $476.77M | 0.27% | -6.4% |
| 9 | Capital Research Global Investors | $426.74M | 0.06% | -24.9% |
| 10 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $370.14M | 0.52% | -0.5% |
| Member | Type | Date |
|---|---|---|
| Pete Sessions | Sell | Oct 13, 2026 |
| Pete Sessions | Sell | Oct 2, 2026 |
| Richard W. Allen | Sell | Sep 18, 2026 |
| Richard Dean McCormick | Sell |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of COST with a position worth $37.62B, representing 0.55% of their portfolio. In total, 21 institutional investors hold COST with a combined value of $100.95B.
In the most recent quarter, 1 fund opened a new position in COST. Additionally, 6 increased their holdings and 13 reduced their positions.
Institutional investors hold $100.95B worth of COST stock across 21 positions. The largest institutional holder is VANGUARD GROUP INC with $37.62B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For COST, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
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Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Jul 30, 2026 |
| Dan Newhouse | Buy | Jul 10, 2026 |
| Alan Armstrong | Buy | Mar 27, 2026 |
| Gilbert Cisneros | Buy | Jan 30, 2026 |
| Markwayne Mullin | Buy | Dec 29, 2025 |
Showing 8 of 70. STOCK Act disclosures lag up to 45 days.
Last Close
$982.73
2026-10-28
YTD
+15.0%
54% of 52-week range