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Insider Trading Intelligence
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JK

James C. Klauer

COST
EXECUTIVE VICE PRESIDENT · COSTCO WHOLESALE CORP /NEW · CIK 0001729360
FILING MIX · LIFETIME20%/80%
BUYS
11
SELLS
43
TOTAL VALUE
$22.56M
COMPANIES
1
ACTIVE SINCE
Aug 2020
HOLDINGS NOW
44,837
AVG SELL PX
$575.18
TRADE KIND
SHOWING 54 / 54
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
6 backtested trades · 8 horizons · 4 pending
Forward-return performance of every backtestable P/S trade by James C. Klauer, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d6+33.33%+0.80%+0.56%+0.24%+1.07%—
14d6+33.33%+0.42%+0.90%-0.49%-0.04%—
30d6+16.67%+2.93%+2.66%+0.27%+0.17%—
60d6+33.33%+5.56%+3.48%+2.08%+4.52%—
90d6+33.33%+8.16%+6.79%+1.37%+5.02%—
180d6(1 pending)+20.00%+17.36%+17.03%+0.33%-0.64%—
1y6(1 pending)+0.00%+29.55%+22.80%+6.75%+14.51%—
2y6(2 pending)+0.00%+65.13%+34.39%+30.74%+35.64%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
COST · 44,836.994 shares · as of Jan 14, 2026
015,15630,31345,46960,625202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 11 buys / 43 sellsCOVERAGE · 23 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,500$939.00$1.41M44,836.994Jan 14, 2026Jan 15, 2026 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
239.95$944.68$226.7K47,014.387Oct 22, 2025Oct 24, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
198.69$944.68$187.7K46,625.017Oct 22, 2025Oct 24, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
190.68$944.68$180.1K46,823.707Oct 22, 2025Oct 24, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
110.97$944.68$104.8K46,336.987Oct 22, 2025Oct 24, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
177.06$944.68$167.3K46,447.957Oct 22, 2025Oct 24, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
958.287$956.29$916.4K47,254.337Sep 10, 2025Sep 12, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
4,219——48,212.624Sep 10, 2025Sep 12, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
4,000$981.07$3.92M43,993.624Apr 17, 2025Apr 21, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
191.079$893.49$170.7K48,368.571Oct 22, 2024Oct 24, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
198.289$893.49$177.2K48,170.282Oct 22, 2024Oct 24, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
176.658$893.49$157.8K47,993.624Oct 22, 2024Oct 24, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
291.224$893.49$260.2K48,799.6Oct 22, 2024Oct 24, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
239.95$893.49$214.4K48,559.65Oct 22, 2024Oct 24, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
6,737.124——50,701.242Sep 16, 2024Sep 18, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,610.418$907.87$1.46M49,090.824Sep 16, 2024Sep 18, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
60.372——43,928.478Jan 12, 2024Jan 12, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
96.012——43,964.118Jan 12, 2024Feb 22, 2024 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
195.176$552.93$107.9K44,938.428Oct 22, 2023Oct 24, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
235.707$552.93$130.3K44,055.806Oct 22, 2023Oct 24, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
360.447$552.93$199.3K44,577.981Oct 22, 2023Oct 24, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
187.7$552.93$103.8K43,868.106Oct 22, 2023Oct 24, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
286.468$552.93$158.4K44,291.513Oct 22, 2023Oct 24, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,500$562.01$843.0K45,133.604Oct 11, 2023Oct 12, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
7,429——48,313Sep 15, 2023Sep 19, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,679.396$556.36$934.3K46,633.604Sep 15, 2023Sep 19, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASE
Executive Vice President
98.5——98.5Jul 20, 2023Apr 21, 2025 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
2,500$503.69$1.26M40,884Jan 27, 2023Jan 31, 2023 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
236$478.18$112.9K43,572Oct 22, 2022Oct 25, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
362$478.18$173.1K44,095Oct 22, 2022Oct 25, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
188$478.18$89.9K43,384Oct 22, 2022Oct 25, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
287$478.18$137.2K43,808Oct 22, 2022Oct 25, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
255$478.18$121.9K44,457Oct 22, 2022Oct 25, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
7,154——44,712Sep 12, 2022Oct 11, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,600$539.52$863.2K42,329Sep 12, 2022Sep 14, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
4,771——43,929Sep 12, 2022Sep 14, 2022 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
551$481.99$265.6K44,219Oct 22, 2021Oct 26, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,435$481.99$691.7K40,575Oct 22, 2021Oct 26, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,445$481.99$696.5K42,010Oct 22, 2021Oct 26, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
764$481.99$368.2K43,455Oct 22, 2021Oct 26, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
1,417$481.99$683.0K39,158Oct 22, 2021Oct 26, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALEGRANT
Gift
15,000——44,770Sep 28, 2021Oct 26, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
855$458.41$391.9K59,770Sep 14, 2021Sep 16, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
8,998——60,625Sep 14, 2021Sep 16, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
5,000$380.53$1.90M51,627Jun 14, 2021Jun 14, 2021 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
288——56,627Dec 11, 2020Dec 11, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
540$375.75$202.9K58,111Oct 22, 2020Oct 23, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
509$375.75$191.3K58,651Oct 22, 2020Oct 23, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
500$375.75$187.9K57,611Oct 22, 2020Oct 23, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
709$375.75$266.4K56,902Oct 22, 2020Oct 23, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
563$375.75$211.5K56,339Oct 22, 2020Oct 23, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
PURCHASEGRANT
Stock grant
10,730——60,132Sep 14, 2020Sep 15, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
972$342.92$333.3K59,160Sep 14, 2020Sep 15, 2020 ↗View →
COST
COSTCO WHOLESALE CORP /NEW
SALE
Executive Vice President
4,000$342.72$1.37M49,402Aug 7, 2020Aug 7, 2020 ↗View →
Other insiders · COST
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About this filer
CIK 0001729360
ROLE
Executive Vice President
PRIMARY
COST
COMPANIES
1
ACTIVE SINCE
Aug 2020
MARKETPEEL · /INSIDER/0001729360DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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