Costco grants director Kenneth D. Denman 266 stock units

The award vests in installments beginning October 22, 2027, with further annual vesting over the following two years.

Rhea-AI Filing Summary

Costco Wholesale Corp. director Kenneth D. Denman acquired 266 restricted stock units through a grant dated October 22, 2026. His reported direct position after the grant was 5,045 shares.

Insider Trade Summary

Grant/Award: 266 shares

Grant/Award 1 txn

Insider DENMAN KENNETH D

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	266	$0.00	$0.00

Holdings After Transaction: Common Stock — 5,044.936 shares (Direct)

Footnotes (2)

1. F1. Grant of Restricted Stock Units. Vests one-third on October 22, 2027, and one-third annually on October 22 for the following two years.
2. F2. Not applicable. Grant of Restricted Stock Units.

Key Figures

Restricted stock units granted: 266 units Direct position after grant: 5,045 shares First vesting installment: One-third +1 more

4 metrics

Restricted stock units granted 266 units Grant dated October 22, 2026

Direct position after grant 5,045 shares Reported following the October 22, 2026 grant

First vesting installment One-third Vests October 22, 2027

Subsequent vesting One-third annually for two years On October 22

Key Terms

Restricted Stock Units, vests

2 terms

Restricted Stock Units financial

"Grant of Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vests financial

"Vests one-third on October 22, 2027"

FAQ

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

How many RSUs did COST director Kenneth D. Denman receive?

Kenneth D. Denman received 266 restricted stock units on October 22, 2026. One-third vests on October 22, 2027, and one-third annually on October 22 for the following two years.

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

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Available on EDGAR 10/26/2026 - 06:19 PM EDT Accepted by SEC EDGAR 10/26/2026 - 06:19 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DENMAN KENNETH D

(Last) (First) (Middle)

999 LAKE DRIVE

(Street)

ISSAQUAH WASHINGTON 98007

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/22/2026

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

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

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/22/2026		A		266(1)	A	$0(2)	5,044.936	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Grant of Restricted Stock Units. Vests one-third on October 22, 2027, and one-third annually on October 22 for the following two years.

2. Not applicable. Grant of Restricted Stock Units.

	/s/ Alejandro Torres, Attorney-in-Fact	10/26/2026
	** 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 4 (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 4: SEC 1474 (03-26)