Costco director Hamilton E. James gets 266 stock units

The 266 restricted stock units vest in thirds beginning October 22, 2027, with annual vesting on October 22 for two more years.

Rhea-AI Filing Summary

Costco Wholesale Corporation director Hamilton E. James received a grant of 266 restricted stock units on October 22, 2026. The units vest one-third on October 22, 2027, and one-third annually on October 22 for the following two years. After the grant, his directly held Common Stock was 55,804 shares. The reported indirect positions on October 22, 2026, were 230 shares in each of Family Trusts I, II and III, and 461 shares in Family Trust IV.

Insider Trade Summary

Grant/Award: 266 shares

Grant/Award 5 txns

Insider JAMES HAMILTON E

Role Director

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

Holdings After Transaction: Common Stock — 55,803.936 shares (Direct); Common Stock — 230 shares (Indirect, By Family Trust I); Common Stock — 230 shares (Indirect, By Family Trust II); Common Stock — 230 shares (Indirect, By Family Trust III); Common Stock — 461 shares (Indirect, By Family Trust IV)

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 restricted stock units Direct Common Stock following grant: 55,804 shares Family Trusts I, II and III holdings: 230 shares each +1 more

4 metrics

Restricted stock units granted 266 restricted stock units October 22, 2026

Direct Common Stock following grant 55,804 shares After the October 22, 2026 grant

Family Trusts I, II and III holdings 230 shares each Reported October 22, 2026

Family Trust IV holdings 461 shares Reported October 22, 2026

Key Terms

Restricted Stock Units, Vesting, Indirect ownership

3 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.

Vesting financial

"Vests one-third on October 22, 2027"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Indirect ownership financial

"By Family Trust I"

FAQ

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

How many Costco (COST) shares did director Hamilton E. James receive?

Hamilton E. James received a grant of 266 restricted stock units on October 22, 2026.

When do Hamilton E. James's Costco (COST) restricted stock units vest?

The units vest one-third 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.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/26/2026 - 06:29 PM EDT Accepted by SEC EDGAR 10/26/2026 - 06:28 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^*

JAMES HAMILTON E

(Last) (First) (Middle)

C/O JEFFERSON RIVER CAPITAL

(Street)

NEW YORK NEW YORK 10022

(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)	55,803.936	D
Common Stock								230	I	By Family Trust I
Common Stock								230	I	By Family Trust II
Common Stock								230	I	By Family Trust III
Common Stock								461	I	By Family Trust IV

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)