COST
insider transactionsCOSTCO WHOLESALE CORP /NEW — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-5.7K
0 buy · 5.7K sell
Net value · 365d
-$5.5M
$0 in · $5.5M out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
6
0 buy · 5.7K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Sell·S
Caton Frates KEY
Executive Vice President
$695.1K
700 sh · $993.00
Own -11%
-
Other·I
Executive Vice President
$636.5K
642 sh · $991.21
-
Other·F
Gary Millerchip KEY
Executive Vice President
$1.1M
1.2K sh · $992.23
Own -7%
-
Sell·S
Claudine Adamo KEY
Executive Vice President
$732.2K
730 sh · $1,003.02
Own -11%
-
Other·G
Director
$0
5.1K sh
Own -31%
-
Other·G
Teresa A. Jones KEY
Executive Vice President
$0
300 sh
Own -7%
-
Sell·S
Teresa A. Jones KEY
Executive Vice President
$838.3K
850 sh · $986.26
Own -17%
-
Sell·S
Director
$437.4K
458 sh · $955.00
Own -5%
-
Grant·A
Director
$0
215 sh
Own New
-
Sell·S
James C Klauer KEY
Executive Vice President
$1.4M
1.5K sh · $939.00
Own -3%
-
Sell·S
Russell D Miller KEY
Sr. Executive Vice President
$1.4M
1.5K sh · $916.32
Own -15%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Apr 1, 2026 | Caton Frates KEY | Sell S | 700 | $695.1K |
| Mar 12, 2026 | Sarah Catherine George KEY | Other I | 642 | $636.5K |
| Mar 11, 2026 | Gary Millerchip KEY | Other F | 1.2K | $1.1M |
| Mar 9, 2026 | Claudine Adamo KEY | Sell S | 730 | $732.2K |
| Jan 27, 2026 | Jeffrey S Raikes | Other G | 5.1K | $0 |
| Jan 27, 2026 | Teresa A. Jones KEY | Other G | 300 | $0 |
| Jan 21, 2026 | Teresa A. Jones KEY | Sell S | 850 | $838.3K |
| Jan 16, 2026 | Susan L Decker | Sell S | 458 | $437.4K |
| Jan 16, 2026 | Gina Marie Raimondo | Grant A | 215 | $0 |
| Jan 14, 2026 | James C Klauer KEY | Sell S | 1.5K | $1.4M |
| Jan 9, 2026 | Russell D Miller KEY | Sell S | 1.5K | $1.4M |
About COST insider trading
This page tracks insider transactions for COSTCO WHOLESALE CORP /NEW (COST) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.