COST
Costco insider trading
Consumer Staples · Heavy selling
Close · Oct 5, 2026
$923.52
+2.0% over 12 months
Share price and insider trades
COST closeInsider buyInsider sale
Bought, 12 months$0
Sold, 12 months$17.3M
Insiders buying0
Insiders selling10
Valuation, profit and volume
P/E (trailing)44.5Sector median 27.9
Market value$409.37BDiscount Stores
Profit margin3.0%Revenue growth +11.1%
Volume vs. 50-day1.1×Last 5 sessions
Insiders' paper profit—On all tracked purchases —
Summary
Over the past 12 months, 0 Costco insiders reported open-market purchases totaling $0, while 10 insiders reported sales totaling $17.3M. 0 of 14 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales. 73 grants, option exercises and tax withholdings are not shown.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 30SEC | Claudine AdamoPresident | Sell | 2,200 | $915.93 | $2.0M | +0.8% | — |
| Sep 30SEC | Caton FratesPresident | Sell | 801 | $915.93 | $733K | +0.8% | — |
| Jun 25SEC | Kenneth D DenmanDirector | Sell | 885 | $957.45 | $847K | -3.5% | — |
| Apr 1SEC | Caton FratesPresident | Sell | 700 | $993.00 | $695K | -7.0% | — |
| Mar 11SEC | Claudine AdamoPresident | Sell | 730 | $1,003.02 | $732K | -7.9% | — |
| Jan 23SEC | Teresa A. JonesPresident | Sell | 850 | $986.26 | $838K | -6.4% | — |
| Jan 20SEC | Susan L DeckerDirector | Sell | 458 | $955.00 | $437K | -3.3% | — |
| Jan 15SEC | James C KlauerPresident | Sell | 1,500 | $939.00 | $1.4M | -1.6% | — |
| Jan 12SEC | Russell D MillerPresident | Sell | 1,500 | $916.32 | $1.4M | +0.8% | — |
| Dec 31SEC | Javier PolitPresident | Sell | 2,049 | $867.21 | $1.8M | +6.5% | — |
| Dec 31SEC | Javier PolitPresident | Sell | 558 | $862.89 | $482K | +7.0% | — |
| Nov 12SEC | William Richard WilcoxPresident | Sell | 2,400 | $930.13 | $2.2M | -0.7% | — |
| Oct 24SEC | Claudine AdamoPresident | Sell | 2,700 | $935.68 | $2.5M | -1.3% | — |
| Oct 24SEC | Tiffany Marie BarbrePrincipal Accounting Officer | Sell | 1,239 | $934.62 | $1.2M | -1.2% | — |
Insiders at Costco
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Claudine AdamoPresident | — | $5.3M | Sep 30, 2026 | — |
| Javier PolitPresident | — | $2.3M | Dec 31, 2025 | — |
| William Richard WilcoxPresident | — | $2.2M | Sep 14, 2026 | — |
| Caton FratesPresident | — | $1.4M | Sep 30, 2026 | — |
| James C KlauerPresident | — | $1.4M | Sep 14, 2026 | — |
| Russell D MillerPresident | — | $1.4M | Jan 12, 2026 | — |
| Tiffany Marie BarbrePrincipal Accounting Officer | — | $1.2M | Oct 24, 2025 | — |
| Kenneth D DenmanDirector | — | $847K | Jun 25, 2026 | — |
| Teresa A. JonesPresident | — | $838K | Sep 14, 2026 | — |
| Susan L DeckerDirector | — | $437K | Jan 20, 2026 | — |
| Yoram RubanenkoPresident | — | — | Sep 14, 2026 | — |
| Pierre RielPresident | — | — | Sep 14, 2026 | — |
| Jeffrey S RaikesDirector | — | — | Jul 14, 2026 | — |
| Gary MillerchipPresident | — | — | Mar 13, 2026 | — |
| Sarah Catherine GeorgePresident | — | — | Mar 13, 2026 | — |
| Gina Marie RaimondoDirector | — | — | Jan 20, 2026 | — |
| Roland Michael VachrisCEO, President | — | — | Oct 24, 2025 | — |
| John Christopher SullivanExecutive Vp | — | — | Oct 24, 2025 | — |
| Patrick J CallansPresident | — | — | Oct 24, 2025 | — |
| Helena FoulkesDirector | — | — | Oct 24, 2025 | — |
| Hamilton E JamesDirector | — | — | Oct 24, 2025 | — |
| Sarah Mr Sally JewellDirector | — | — | Oct 24, 2025 | — |
| Mary Agnes WilderotterDirector | — | — | Oct 24, 2025 | — |
| John W StantonDirector | — | — | Oct 24, 2025 | — |
Insider activity at other Consumer Staples companies
Same sector, ranked by insider buying in the last 90 days.
Common questions about COST insiders
Are Costco insiders buying COST stock?
In the past 12 months, 0 insiders reported open-market purchases of COST worth $0.
Are Costco insiders selling COST stock?
10 insiders reported sales worth $17.3M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.