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Costco Wholesale

Costco Wholesale (NASDAQ: COST) insider transactions

In the twelve months to 10 November 2026, executives and directors of Costco Wholesale reported 12 open-market sales of 13,331 shares ($12.4m) and 0 open-market purchases, by 9 people, according to the Form 4 filings they submitted to the SEC.

Latest transactions

The 20 most recent transactions in Costco Wholesale shares reported on Form 4
DateInsiderRoleTransactionSharesPriceHeld afterFiling
22 October 2026Polit JavierExecutive Vice PresidentGrant or award+4,129—14,319Form 4
22 October 2026Polit JavierExecutive Vice PresidentShares withheld for tax−391$1,018.2113,928Form 4
22 October 2026Polit JavierExecutive Vice PresidentShares withheld for tax−294$1,018.2113,633Form 4
22 October 2026Polit JavierExecutive Vice PresidentShares withheld for tax−337$1,018.2113,296Form 4
22 October 2026Polit JavierExecutive Vice PresidentShares withheld for tax−549$1,018.2112,747Form 4
22 October 2026Self Adam WebbExecutive Vice PresidentShares withheld for tax−62$1,018.213,468Form 4
22 October 2026Self Adam WebbExecutive Vice PresidentShares withheld for tax−64$1,018.213,403Form 4
22 October 2026Self Adam WebbExecutive Vice PresidentShares withheld for tax−57$1,018.213,346Form 4
22 October 2026Self Adam WebbExecutive Vice PresidentShares withheld for tax−36$1,018.213,310Form 4
22 October 2026Self Adam WebbExecutive Vice PresidentShares withheld for tax−41$1,018.213,270Form 4
22 October 2026Sullivan John ChristopherExecutive VPGrant or award+4,552—52,223Form 4
22 October 2026Sullivan John ChristopherExecutive VPShares withheld for tax−573$1,018.2151,650Form 4
22 October 2026Sullivan John ChristopherExecutive VPShares withheld for tax−647$1,018.2151,003Form 4
22 October 2026Sullivan John ChristopherExecutive VPShares withheld for tax−975$1,018.2150,028Form 4
22 October 2026Sullivan John ChristopherExecutive VPShares withheld for tax−732$1,018.2149,296Form 4
22 October 2026Sullivan John ChristopherExecutive VPShares withheld for tax−836$1,018.2148,460Form 4
22 October 2026Adamo ClaudineExecutive Vice PresidentShares withheld for tax−97$1,018.217,037Form 4
22 October 2026Adamo ClaudineExecutive Vice PresidentShares withheld for tax−198$1,018.216,838Form 4
22 October 2026Adamo ClaudineExecutive Vice PresidentShares withheld for tax−177$1,018.216,661Form 4
22 October 2026Adamo ClaudineExecutive Vice PresidentShares withheld for tax−111$1,018.216,550Form 4

Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.

How to read the table

Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.

Where each row comes from

From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Costco Wholesale page; the method, in data sources.

Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.