Barbre Tiffany Marie - Insider Non-Derivative Transactions at COSTCO WHOLESALE CORP /NEW (COST) - (SEC)

Updated on March 12, 2026.

According to recent SEC insider information filed on Oct 24, 2025, Barbre Tiffany Marie's relationship to COSTCO WHOLESALE CORP /NEW (COST) is Other, and currently has 5,155.45 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other COST insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Barbre Tiffany Marie - Insider Non-Derivative Transactions of COST Common Stock

Barbre Tiffany Marie - Insider Non-Derivative Transactions at COST

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Oct 25, 2025	Sell -- (Common Stock)	1239.38	934.62	5155.45
Oct 23, 2025	F -- (Common Stock)	84.6	944.68	6394.83
Oct 23, 2025	F -- (Common Stock)	135.4	944.68	6479.43
Oct 23, 2025	F -- (Common Stock)	118.56	944.68	6614.83
Oct 23, 2025	F -- (Common Stock)	90.23	944.68	6733.39
Oct 23, 2025	F -- (Common Stock)	113.53	944.68	6823.62
Oct 23, 2025	Acquisition -- (Common Stock)	2118	0	6937.15