Costco4

Wilcox William Richard bought 4,129 shares at $0.00 on 2026-09-10; Wilcox William Richard sold 1,935 shares at $902.38 on 2026-09-10

Sep 14
Costco4

Rubanenko Yoram bought 4,129 shares at $0.00 on 2026-09-10; Rubanenko Yoram sold 1,696 shares at $902.38 on 2026-09-10

Sep 14
Costco4

Riel Pierre bought 4,552 shares at $0.00 on 2026-09-10; Riel Pierre sold 1,562 shares at $902.38 on 2026-09-10

Sep 14
Costco4

Klauer James C bought 4,129 shares at $0.00 on 2026-09-10; Klauer James C sold 936 shares at $902.38 on 2026-09-10 (+1 more)

Sep 14
Costco4

Jones Teresa A. bought 4,129 shares at $0.00 on 2026-09-10; Jones Teresa A. sold 1,459 shares at $902.38 on 2026-09-10

Sep 14
Costco4

Frates Caton bought 4,552 shares at $0.00 on 2026-09-10; Frates Caton sold 1,654 shares at $902.38 on 2026-09-10

Sep 14
Costco4

Adamo Claudine bought 4,129 shares at $0.00 on 2026-09-10; Adamo Claudine sold 917 shares at $902.38 on 2026-09-10

Sep 14
Costco3

Self Adam Webb initial ownership report

Sep 10
Costco4

RAIKES JEFFREY S sold 5,249 shares at $0.00 on 2026-07-10

Jul 15
Costco8-K

8-K current report

Jul 9
Costco4

DENMAN KENNETH D sold 885 shares of Common Stock at $957.45 on 2026-06-23

Jun 26
Costco144

DENMAN KENNETH D plans to sell 885 Common ($847.3K)

Jun 24
Costco10-Q

COSTCO WHOLESALE CORP /NEW filed 10-Q on 2026-06-03

Jun 4
Costco8-K

8-K current report

May 29
Costco3/A

George Sarah Catherine transacted N/A shares of Common Stock at $N/A on N/A

May 16
Costco8-K

8-K current report

Apr 16
Costco4

Frates Caton sold 700 shares of Common Stock at $993.00 on 2026-04-01

Apr 2
Costco4

George Sarah Catherine sold 642 shares of Common Stock at $991.21 on 2026-03-12; George Sarah Catherine transacted N/A shares of Common Stock at $N/A on N/A

Mar 14
Costco4

MILLERCHIP GARY sold 1,154 shares of Common Stock at $992.23 on 2026-03-11

Mar 14
Costco3

George Sarah Catherine transacted N/A shares of Common Stock at $N/A on N/A

Mar 12