Costco gives accounting chief a 1,965-unit stock grant

The grant vests in one-fifth installments beginning October 22, 2027, with further installments on October 22 for the following four years.

Rhea-AI Filing Summary

Tiffany Marie Barbre, Costco Wholesale’s Principal Accounting Officer, received a grant of 1,965 restricted stock units on October 22, 2026. On that date, Costco withheld 537 shares for taxes tied to vesting of previously granted units; the reported $1,018.21 price represents Costco common stock’s closing market price on Nasdaq. The grant is eligible for accelerated vesting under the 2019 Stock Incentive Plan.

Insider Trade Summary

7 transactions reported

Mixed 7 txns

Insider Barbre Tiffany Marie

Role Insider

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	1,965	$0.00	$0.00
Tax Withholding	Common Stock F3	90.23	$1,018.21	$92K
Tax Withholding	Common Stock F3	93.948	$1,018.21	$96K
Tax Withholding	Common Stock F3	101.536	$1,018.21	$103K
Tax Withholding	Common Stock F3	84.603	$1,018.21	$86K
Tax Withholding	Common Stock F3	166.451	$1,018.21	$169K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 6,583.68 shares (Direct); Common Stock — 2.1788 shares (Indirect, By 401(k))

Footnotes (3)

1. F1. Grant of Restricted Stock Units. Vests one-fifth on October 22, 2027, and one-fifth annually on October 22 for the following four years. In addition, under the 2019 Stock Incentive Plan, this grant is eligible for accelerated vesting upon the anniversary of the reporting person's 25th, 30th and 35th years of service.
2. F2. Not applicable. Grant of Restricted Stock Units.
3. 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.

Key Figures

Restricted stock unit grant: 1,965 shares Shares withheld for taxes: 537 shares Closing market price: $1,018.21 per share +2 more

5 metrics

Restricted stock unit grant 1,965 shares Granted October 22, 2026

Shares withheld for taxes 537 shares Connected with vesting of previously granted units on October 22, 2026

Closing market price $1,018.21 per share Costco common stock on Nasdaq, October 22, 2026

Initial vesting One-fifth on October 22, 2027 Restricted stock unit grant

Subsequent vesting One-fifth annually on October 22 for the following four years Restricted stock unit grant

Key Terms

Restricted Stock Units, accelerated vesting, withholding by the Company for taxes

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.

accelerated vesting financial

"eligible for accelerated vesting"

A contract feature that makes stock awards, options, or restricted shares become owned or exercisable earlier than the original schedule. It shortens or cancels the waiting period so recipients can sell, transfer, or exercise their equity sooner — think of a timed lock that is unlocked ahead of schedule. It matters to investors because it changes when shares enter the market, who controls them, and how much dilution or ownership concentration happens.

withholding by the Company for taxes financial

"This transaction is a withholding by the Company for taxes"

FAQ

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

How many restricted stock units did COST’s Principal Accounting Officer receive?

Tiffany Marie Barbre, Costco Wholesale’s Principal Accounting Officer, received a grant of 1,965 restricted stock units on October 22, 2026.

How many COST shares were withheld for taxes?

Costco withheld 537 shares for taxes in connection with vesting of previously granted restricted stock units on October 22, 2026. The reported $1,018.21 price represents Costco common stock’s closing market price on Nasdaq that day.

When do COST’s newly granted restricted stock units vest?

One-fifth vests on October 22, 2027, and one-fifth annually on October 22 for the following four years. The grant is eligible for accelerated vesting on anniversaries of the reporting person’s 25th, 30th and 35th years of service under the 2019 Stock Incentive Plan.

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

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Available on EDGAR 10/26/2026 - 06:15 PM EDT Accepted by SEC EDGAR 10/26/2026 - 06:15 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^*

Barbre Tiffany Marie

(Last) (First) (Middle)

999 LAKE DRIVE

(Street)

ISSAQUAH WASHINGTON 98027

(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)

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

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		1,965(1)	A	$0(2)	7,120.448	D
Common Stock	10/22/2026		F		90.23	D	$1,018.21(3)	7,030.218	D
Common Stock	10/22/2026		F		93.948	D	$1,018.21(3)	6,936.27	D
Common Stock	10/22/2026		F		101.536	D	$1,018.21(3)	6,834.734	D
Common Stock	10/22/2026		F		84.603	D	$1,018.21(3)	6,750.131	D
Common Stock	10/22/2026		F		166.451	D	$1,018.21(3)	6,583.68	D
Common Stock								2.1788	I	By 401(k)

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-fifth on October 22, 2027, and one-fifth annually on October 22 for the following four years. In addition, under the 2019 Stock Incentive Plan, this grant is eligible for accelerated vesting upon the anniversary of the reporting person's 25th, 30th and 35th years of service.

2. Not applicable. Grant of Restricted Stock Units.

3. 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.

	/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)