Costco Wholesale Corporation
Costco Wholesale Corporation (COST) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · COST · as of Sep 30, 2024
Ownership Breakdown
3,705
Institutional Holders
▲ 71 vs Q2
$266.66B
Total Inst. Value
▲ $8.62B vs Q2
443.48M
Shares Outstanding
freeFloat 99.80%
308.54M
13F Shares Held
▲ 4.20M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
COST largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC retail-variety stores | 41.75M | 9.40% | 9.40% | $37.01T | Nov 13, 2024 | ▲ 373.0K |
BLACKROCK, INC. retail-variety stores | 33.56M | 7.56% | 7.56% | $29.75T | Nov 13, 2024 | NEW |
STATE STREET CORP retail-variety stores | 18.04M | 4.06% | 4.06% | $15.99T | Nov 14, 2024 | ▼ 586.0K |
GEODE CAPITAL MANAGEMENT, LLC retail-variety stores | 9.49M | 2.14% | 2.14% | $8.38T | Nov 12, 2024 | ▲ 162.2K |
MORGAN STANLEY retail-variety stores | 9.45M | 2.13% | 2.13% | $8.38T | May 14, 2025 | ▲ 8.4K |
FMR LLC retail-variety stores | 9.31M | 2.10% | 2.10% | $8.25T | Nov 13, 2024 | ▲ 325.0K |
INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC retail-variety stores | 7.37M | 1.66% | 1.66% | $8.31B | Oct 22, 2024 | ▲ 7.36M |
BANK OF AMERICA CORP /DE/ retail-variety stores | 7.08M | 1.59% | 1.59% | $6.28T | Nov 14, 2024 | ▼ 169.9K |
NORGES BANK retail-variety stores | 5.51M | 1.24% | 1.24% | $4.89T | Nov 12, 2025 | ▲ 197.9K |
NORTHERN TRUST CORP retail-variety stores | 4.67M | 1.05% | 1.05% | $4.14T | Nov 13, 2024 | ▼ 153.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
28
Increased
+12.19M shares1
New Positions
first time holders21
Decreased
−2.38M shares0
Sold Out
fully exitedNet shares change (top 50)
+9.80M
+12.19M / −2.38M
Net new holders
+8
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
COST insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Frates Caton Executive Vice President | Apr 1, 2026 | Sale | 700 | $993.00 | $695.1K | 5.8K | Form 4 ↗ |
George Sarah Catherine Executive Vice President | Mar 12, 2026 | I-Discretionary | 642.125 | $991.21 | $636.5K | 0 | Form 4 ↗ |
MILLERCHIP GARY Executive Vice President | Mar 11, 2026 | Tax Withhold | 1,154.017 | $992.23 | $1.15M | 15.5K | Form 4 ↗ |
Adamo Claudine Executive Vice President | Mar 9, 2026 | Sale | 730 | $1003.02 | $732.2K | 6.1K | Form 4 ↗ |
RAIKES JEFFREY S director | Jan 27, 2026 | Gift | 5,115 | — | — | 11.3K | Form 4 ↗ |
Jones Teresa A. Executive Vice President | Jan 27, 2026 | Gift | 300 | — | — | 3.9K | Form 4 ↗ |
Jones Teresa A. Executive Vice President | Jan 21, 2026 | Sale | 850 | $986.26 | $838.3K | 4.2K | Form 4 ↗ |
DECKER SUSAN L director | Jan 16, 2026 | Sale | 458 | $955.00 | $437.4K | 8.5K | Form 4 ↗ |
Raimondo Gina Marie director | Jan 16, 2026 | Award | 215 | — | — | 215 | Form 4 ↗ |
Klauer James C Executive Vice President | Jan 14, 2026 | Sale | 1,500 | $939.00 | $1.41M | 44.8K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Costco Wholesale Corporation (COST) is primarily owned by institutional investors, who hold approximately 69.6% of total shares outstanding. Company insiders own approximately 0.20%, while retail and public investors account for the remaining 30.22%.
The largest institutional shareholder of Costco Wholesale Corporation is VANGUARD GROUP INC, holding approximately 41.75 million shares — equal to 9.40% of outstanding shares — as of September 30, 2024.
A total of 3,705 institutional investors currently hold COST stock, with a combined institutional value of approximately $266.66 billion as of the most recent 13F filing period.
Frequently asked questions
COST ownershipCostco Wholesale Corporation (COST) is primarily owned by institutional investors, who hold approximately 69.6% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.40% stake. Company insiders hold 0.20%. Data sourced from SEC Form 13F as of September 30, 2024.