Costco Wholesale Corp: executive vp Claudine Adamo sold 691.863 shares

What happened

• Claudine Adamo, executive vice president, had shares withheld to cover taxes on vested restricted stock units. The filing shows five withholding transactions totaling 691.863 shares at $1,018.21 per share for $704,462 on Oct 22, 2026.

Key details

• Transaction date and price: Oct 22, 2026, at $1,018.21 per share (closing Nasdaq price).
• Individual withholding transactions reported:
  • 96.942 shares withheld for $98,707
  • 198.289 shares withheld for $201,900
  • 177.058 shares withheld for $180,282
  • 110.967 shares withheld for $112,988
  • 108.607 shares withheld for $110,585
• Shares owned after the transaction: not stated in the filing.
• Footnote F1: the transactions are withholdings by the company for taxes in connection with the vesting of previously granted restricted stock units; the price represents the closing market price on Oct 22, 2026.
• Filing date: Oct 26, 2026. The filing does not indicate it was filed late.

Why it may matter

• These were tax-withholding dispositions tied to RSU vesting, not separate open-market purchases or voluntary sales reported as market trades.
• A filing does not show why the insider traded or why the company acted.