Costco EVP Adam Webb corrects 2.52-share omission

Costco Wholesale Corp. (COST) amended Executive Vice President Adam Webb’s initial ownership report to add 2.52 shares inadvertently omitted from his Form 3 filed September 10, 2026.

This filing corrects an earlier one, and you can read the original Form 3 if you want to see what changed.

Rhea-AI Filing Summary

Costco Wholesale Corp. (COST) amended Executive Vice President Adam Webb’s initial ownership report to add 2.52 shares inadvertently omitted from his Form 3 filed September 10, 2026. The amended report lists 3,529 shares of Costco common stock held directly on August 31, 2026.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Self Adam Webb

Role Executive Vice President

Type	Security	Shares	Price	Value
holding	Common Stock F1	--	--	--

Holdings After Transaction: Common Stock — 3,529.352 shares (Direct)

Footnotes (1)

1. F1. 2.52 shares were inadvertently omitted from the reporting person's Form 3 filed on September 10, 2026.

Key Figures

Direct common stock holdings: 3,529 shares Omitted shares added: 2.52 shares

2 metrics

Direct common stock holdings 3,529 shares Reported August 31, 2026

Omitted shares added 2.52 shares Inadvertently omitted from the initial Form 3

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many Costco (COST) shares does Adam Webb report holding?

Adam Webb reports holding 3,529 shares directly as of August 31, 2026. The amendment adds 2.52 shares inadvertently omitted from his initial Form 3.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/30/2026 - 05:46 PM Accepted by SEC EDGAR 09/30/2026 - 05:46 PM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Self Adam Webb

(Last) (First) (Middle)

999 LAKE DRIVE

(Street)

ISSAQUAH WASHINGTON 98027

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
08/31/2026

3. Issuer Name and Ticker or Trading Symbol
COSTCO WHOLESALE CORP /NEW [ COST ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)
09/10/2026

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive Vice President

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	3,529.352(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 2.52 shares were inadvertently omitted from the reporting person's Form 3 filed on September 10, 2026.

	/s/ Alejandro Torres, Attorney-in-Fact	09/30/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)