Roland Michael Vachris - 22 Oct 2026 Form 4 Insider Report for COSTCO WHOLESALE CORP /NEW (COST)

Reporting relationship: President and CEO, Director
Issuer ticker: COST
Reported as of: 22 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 Oct 2026, 21:44:33 UTC
Prior SEC filing: 24 Oct 2025
Source filing: View source filing
Reporting owner signature: Alejandro Torres, Attorney-in-Fact

Filing notes and source

Key filing fact

Roland Michael Vachris filed Form 4 for COSTCO WHOLESALE CORP /NEW (COST) on 26 Oct 2026.

Key facts

This page summarizes Roland Michael Vachris's Form 4 filing for COSTCO WHOLESALE CORP /NEW (COST).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 26 Oct 2026, 21:44.

Change

Previous filing in this sequence was filed on 24 Oct 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001679566 Primary reporting owner

Vachris Roland Michael

Relationship: President and CEO, Director
Address: 999 LAKE DRIVE, ISSAQUAH
Signature: Alejandro Torres, Attorney-in-Fact
Signature date: 26 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

COST transaction

Common Stock

Award

Transaction value
Shares: +13,973
Change %: +27%
Price: $0.000000^*
Shares after: 66,231
Date: 22 Oct 2026
Ownership: Direct
Footnotes: F1, F2

COST transaction

Common Stock

Tax liability

Transaction value
Shares: -1,404
Change %: -2.1%
Price: $1018.21^*
Shares after: 64,827
Date: 22 Oct 2026
Ownership: Direct
Footnotes: F3

COST transaction

Common Stock

Tax liability

Transaction value
Shares: -1,121
Change %: -1.7%
Price: $1018.21^*
Shares after: 63,707
Date: 22 Oct 2026
Ownership: Direct
Footnotes: F3

COST transaction

Common Stock

Tax liability

Transaction value
Shares: -1,131
Change %: -1.8%
Price: $1018.21^*
Shares after: 62,575
Date: 22 Oct 2026
Ownership: Direct
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company.

Footnote F2

Not applicable. Grant of Restricted Stock Units.

Footnote F3

This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2026.