Costco Wholesale Corporation
Costco Wholesale Corporation (COST) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · COST · as of Jun 8, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
15
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Costco Wholesale Corporation insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
COST insider buying and selling by quarter
COST insider selling · COST insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · COST ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
COST executive sell shares · COST board member insider trading · COST insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Apr 1, 2026 | Frates Caton EVP | Sale | 700 | $695K | Form 4 |
| Mar 12, 2026 | George Sarah Catherine EVP | Other | 642.125 | $636K | Form 4 |
| Mar 11, 2026 | MILLERCHIP GARY EVP | Other | 1,154.017 | $1.15M⚡ | Form 4 |
| Mar 9, 2026 | Adamo Claudine EVP | Sale | 730 | $732K | Form 4 |
| Jan 27, 2026 | RAIKES JEFFREY S Director | Gift | 5,115 | — | Form 4 |
| Jan 27, 2026 | Jones Teresa A. EVP | Gift | 300 | — | Form 4 |
| Jan 21, 2026 | Jones Teresa A. EVP | Sale | 850 | $838K | Form 4 |
| Jan 16, 2026 | DECKER SUSAN L Director | Sale | 458 | $437K | Form 4 |
| Jan 16, 2026 | Raimondo Gina Marie Director | Award | 215 | — | Form 4 |
| Jan 14, 2026 | Klauer James C EVP | Sale | 1,500 | $1.41M⚡ | Form 4 |
| Jan 9, 2026 | Miller Russell D Sr. Executive Vice President | Sale | 1,500 | $1.37M⚡ | Form 4 |
| Dec 29, 2025 | POLIT JAVIER EVP | Sale | 2,049 | $1.78M⚡ | Form 4 |
| Dec 30, 2025 | POLIT JAVIER EVP | Sale | 558.305 | $482K | Form 4 |
| Dec 19, 2025 | DENMAN KENNETH D Director | Gift | 325 | — | Form 4 |
| Dec 15, 2025 | DECKER SUSAN L Director | Gift | 2,827 | — | Form 4 |
| Nov 10, 2025 | RAIKES JEFFREY S Director | Gift | 4,120 | — | Form 4 |
| Nov 7, 2025 | Wilcox William Richard EVP | Sale | 2,400 | $2.23M⚡ | Form 4 |
| Oct 22, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Award | 2,118 | — | Form 4 |
| Oct 22, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Other | 113.53 | $107K | Form 4 |
| Oct 22, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Other | 90.23 | $85K | Form 4 |
| Oct 22, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Other | 118.56 | $112K | Form 4 |
| Oct 22, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Other | 135.4 | $128K | Form 4 |
| Oct 22, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Other | 84.6 | $80K | Form 4 |
| Oct 24, 2025 | Barbre Tiffany Marie other: Principal Accounting Officer | Sale | 1,239.383 | $1.16M⚡ | Form 4 |
| Oct 22, 2025 | Vachris Roland Michael President and CEO · Director | Award | 13,834 | — | Form 4 |
Miller Russell D
Sr. Executive Vice President
Date
Jan 9
Shares
1,500
Price
$916.32
Value
$1.37M ⚡
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 22
Shares
2,118
Price
—
Value
—
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 22
Shares
113.53
Price
$944.68
Value
$107K
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 22
Shares
90.23
Price
$944.68
Value
$85K
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 22
Shares
118.56
Price
$944.68
Value
$112K
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 22
Shares
135.4
Price
$944.68
Value
$128K
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 22
Shares
84.6
Price
$944.68
Value
$80K
Barbre Tiffany Marie
other: Principal Accounting Officer
Date
Oct 24
Shares
1,239.383
Price
$934.62
Value
$1.16M ⚡
Vachris Roland Michael
President and CEO · Director
Date
Oct 22
Shares
13,834
Price
—
Value
—
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About COST insider trading
COST insider trades
Costco Wholesale Corporation (COST) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Frates Caton (EVP), Adamo Claudine (EVP), Klauer James C (EVP). Over the past 12 months, 5 insiders have filed transactions with the SEC. COST insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Costco Wholesale Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
COST insider trading · 5 questionsThe insiders of Costco Wholesale Corporation (COST) include executives and directors such as Frates Caton (EVP), Adamo Claudine (EVP), Klauer James C (EVP), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026