John Christopher Sullivan - 22 Oct 2025 Form 4 Insider Report for COSTCO WHOLESALE CORP /NEW (COST)

Reporting relationship: Executive VP
Issuer ticker: COST
Reported as of: 22 Oct 2025
Net transaction value: -$2,374,491
SEC form: 4
Accepted by SEC: 24 Oct 2025, 19:30:50 UTC
Prior SEC filing: 24 Oct 2024
Source filing: View source filing
Reporting owner signature: /s/ Alejandro Torres, Attorney-in-Fact

Key filing fact

John Christopher Sullivan filed Form 4 for COSTCO WHOLESALE CORP /NEW (COST) on 24 Oct 2025.

Key facts

This page summarizes John Christopher Sullivan's Form 4 filing for COSTCO WHOLESALE CORP /NEW (COST).
6 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 24 Oct 2025, 19:30.

Change

Previous filing in this sequence was filed on 24 Oct 2024.
Current net transaction value: -$2,374,491.

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 0001902272 Primary reporting owner

Sullivan John Christopher

Relationship: Executive VP
Address: 999 LAKE DRIVE, ISSAQUAH
Signature: /s/ Alejandro Torres, Attorney-in-Fact
Signature date: 24 Oct 2025

Reported non-derivative transactions

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

COST transaction

Common Stock

Award

Transaction value: $0
Shares: +4,654
Change %: +10%
Price: $0.000000
Shares after: 50,185
Date: 22 Oct 2025
Ownership: Direct
Footnotes: F1, F2

COST transaction

Common Stock

Tax liability

Transaction value: $397,720
Shares: -421
Change %: -0.84%
Price: $944.68
Shares after: 49,764
Date: 22 Oct 2025
Ownership: Direct
Footnotes: F3

COST transaction

Common Stock

Tax liability

Transaction value: $541,141
Shares: -573
Change %: -1.2%
Price: $944.68
Shares after: 49,191
Date: 22 Oct 2025
Ownership: Direct
Footnotes: F3

COST transaction

Common Stock

Tax liability

Transaction value: $537,419
Shares: -569
Change %: -1.2%
Price: $944.68
Shares after: 48,622
Date: 22 Oct 2025
Ownership: Direct
Footnotes: F3

COST transaction

Common Stock

Tax liability

Transaction value: $552,496
Shares: -585
Change %: -1.2%
Price: $944.68
Shares after: 48,037
Date: 22 Oct 2025
Ownership: Direct
Footnotes: F3

COST transaction

Common Stock

Tax liability

Transaction value: $345,715
Shares: -366
Change %: -0.76%
Price: $944.68
Shares after: 47,671
Date: 22 Oct 2025
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, 2024, subject to performance conditions concerning fiscal 2025, 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. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

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, 2025.

SEC remarks

Exhbit 24: Power of Attorney provided herewith.