Costco Wholesale EVP Teresa A. Jones Acquires Shares via Performance Equity Grant and Tax Withholding

Insider Filing Analysis: Costco Wholesale Corp ($COST)

Executive Summary On September 14, 2026, Costco Wholesale Corp filed a Form 4 disclosing transactions by Executive Vice President Teresa A. Jones executed on September 10, 2026.

Key Transactions

1. Performance Share Grant (Code A):

   • Shares Acquired: 4,129 shares of Common Stock
   • Price: $0.00 per share
   • Notes: Represents the certification and satisfaction of performance conditions for a grant initially made on October 22, 2025. The earned awards vest 20% annually over five years based on continued service.

2. Tax Withholding Disposition (Code F):

   • Shares Withheld: 1,458.535 shares of Common Stock
   • Price per Share: $902.38
   • Total Value Withheld: ~$1,316,152.81
   • Notes: Shares surrendered to satisfy tax withholding obligations associated with the vesting equity.

Ownership Overview

• Post-Transaction Holdings: 6,598.269 shares held directly.

Market Assessment This filing represents standard executive compensation vesting and associated tax withholding. It does not constitute discretionary open-market buying or selling.