Claudine Adamo Costco Wholesale Corp (COST) insider trading activity

Claudine Adamo is Executive Vice President of COSTCO WHOLESALE CORP . Currently has a direct ownership of 6,851 shares of COST, which is worth approximately $6.25 Million. The most recent transaction as insider was on Oct 24, 2025, when has been sold 2,700 shares (Common Stock) at a price of $935.68 per share, resulting in proceeds of $2,526,336. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 6.85K

33.19% 3M change

13.12% 12M change

Total Value Held $6.25 Million

Claudine Adamo Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Oct 24 2025	SELL Open market or private sale	$2,526,336 $935.68 p/Share	2,700 Reduced 28.27%	6,851 Common Stock
Oct 22 2025	SELL Payment of exercise price or tax liability	$662,220 $944.68 p/Share	701 Reduced 6.84%	9,551 Common Stock
Sep 10 2025	SELL Payment of exercise price or tax liability	$907,519 $956.29 p/Share	949 Reduced 8.47%	10,255 Common Stock
Sep 10 2025	BUY Grant, award, or other acquisition	-	4,219 Added 27.35%	11,205 Common Stock
Mar 24 2025	SELL Open market or private sale	$830,304 $922.56 p/Share	900 Reduced 11.41%	6,986 Common Stock
Oct 22 2024	SELL Payment of exercise price or tax liability	$662,076 $893.49 p/Share	741 Reduced 8.59%	7,886 Common Stock
Sep 30 2024	SELL Open market or private sale	$2,844,768 $888.99 p/Share	3,200 Reduced 27.05%	8,629 Common Stock

Sep 16 2024	SELL Payment of exercise price or tax liability	$1,454,407 $907.87 p/Share	1,602 Reduced 11.93%	11,829 Common Stock
Sep 16 2024	BUY Grant, award, or other acquisition	-	6,737 Added 33.4%	13,431 Common Stock
Mar 11 2024	SELL Open market or private sale	$1,072,245 $714.83 p/Share	1,500 Reduced 18.31%	6,694 Common Stock
Jan 12 2024	BUY Grant, award, or other acquisition	-	30 Added 0.37%	8,158 Common Stock
Oct 23 2023	SELL Open market or private sale	$1,407,979 $548.92 p/Share	2,565 Reduced 23.99%	8,128 Common Stock
Oct 22 2023	SELL Payment of exercise price or tax liability	$408,615 $552.93 p/Share	739 Reduced 6.46%	10,693 Common Stock
Sep 15 2023	SELL Payment of exercise price or tax liability	$934,128 $556.36 p/Share	1,679 Reduced 12.8%	11,434 Common Stock
Sep 15 2023	BUY Grant, award, or other acquisition	-	7,429 Added 36.16%	13,114 Common Stock
Oct 26 2022	SELL Open market or private sale	$991,940 $495.97 p/Share	2,000 Reduced 26.02%	5,685 Common Stock
Oct 22 2022	SELL Payment of exercise price or tax liability	$1,077,818 $478.18 p/Share	2,254 Reduced 22.68%	7,685 Common Stock
Apr 08 2022	SELL Open market or private sale	$301,015 $602.03 p/Share	500 Reduced 4.79%	9,939 Common Stock

Claudine Adamo

Executive Vice President

Issaquah, WA

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