COSTCO WHOLESALE CORP /NEW

SEC insider activity covers quarterly filings through June 30, 2026. Later filings are not included. Reported roles do not establish current employment or current holdings. SEC filing documents, sections and filing-text search cover filings dated January 1, 2000 onward. Earlier filings are deferred until after launch.

COST

organization

SIC: 5331

SEC Insider

$1.95B

3,610 transactions

Summary

COSTCO WHOLESALE CORP /NEW (COST) is an organization.

Recent Insider Transactions

As filed, including amendments; not net cash flow or current holdings. Joint reports count once. Totals cover known values only.

Buys: $3.3MSales: $759.1M47 insiders

Date	Insider	Type	Value
2025-10-24	Adamo Claudine(Executive Vice President)	Sell	$2.5M
2025-11-07	Wilcox William Richard(Executive Vice President)	Sell	$2.2M
2025-12-29	POLIT JAVIER(Executive Vice President)	Sell	$1.8M
2026-01-14	Klauer James C(Executive Vice President)	Sell	$1.4M
2026-01-09	Miller Russell D(Sr. Executive Vice President)	Sell	$1.4M
2025-10-24	Barbre Tiffany Marie	Sell	$1.2M
2026-03-11	MILLERCHIP GARY(Executive Vice President)	F	$1.1M
2026-06-23	DENMAN KENNETH D	Sell	$847K
2026-01-21	Jones Teresa A.(Executive Vice President)	Sell	$838K
2026-03-09	Adamo Claudine(Executive Vice President)	Sell	$732K
2026-04-01	Frates Caton(Executive Vice President)	Sell	$695K
2026-03-12	George Sarah Catherine(Executive Vice President)	I	$636K
2025-12-30	POLIT JAVIER(Executive Vice President)	Sell	$482K
2026-01-16	DECKER SUSAN L	Sell	$437K
2026-01-27	Jones Teresa A.(Executive Vice President)	G	$0
2026-01-27	RAIKES JEFFREY S	G	$0
2026-01-16	Raimondo Gina Marie	A	$0
2025-12-19	DENMAN KENNETH D	G	$0
2025-12-15	DECKER SUSAN L	G	$0
2025-11-10	RAIKES JEFFREY S	G	$0

SEC filings: SEC EDGAR

Activity data: SEC EDGAR

COSTCO WHOLESALE CORP /NEW — Contributions, Lobbying & Contracts | Poliscope