Costco (COST) EVP Caton Frates sells 700 shares at $993 each

Rhea-AI Filing Summary

Costco Wholesale Corp. Executive Vice President Caton Frates sold 700 shares of Common Stock in an open-market transaction at $993.00 per share. After this sale, he directly holds 5,815.001 shares. This was a single, non-derivative sale and no option exercises or derivative transactions were reported.

Insider Trade Summary

Net Seller: 700 shares ($695,100)

Net Sell 1 txn

Insider Frates Caton

Role Executive Vice President

Sold 700 shs ($695K)

Type	Security	Shares	Price	Value
Sale	Common Stock	700	$993.00	$695K

Holdings After Transaction: Common Stock — 5,815.001 shares (Direct)

Footnotes (1)

Key Figures

Shares sold: 700 shares Sale price per share: $993.00 per share Shares held after transaction: 5,815.001 shares +1 more

4 metrics

Shares sold 700 shares Open-market sale of Common Stock

Sale price per share $993.00 per share Price for the 700 shares sold

Shares held after transaction 5,815.001 shares Direct ownership after sale

Net shares sold 700 shares Net change in buy/sell activity

Key Terms

open-market sale, Common Stock, non-derivative, transaction code "S"

4 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

non-derivative financial

""transaction_type": "non-derivative""

transaction code "S" financial

""transaction_code": "S""

Form 4 Insider Transactions: What Each Field Means →

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^*

Frates Caton

(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
X	Officer (give title below)		Other (specify below)
	Executive Vice President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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	04/01/2026		S		700	D	$993	5,815.001	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:

	/s/ Alejandro Torres, Attorney-in-Fact	04/01/2026
	** 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)

FAQ

What insider transaction did Costco (COST) report for Caton Frates?

Costco reported that Executive Vice President Caton Frates sold 700 shares of Common Stock. The sale was a non-derivative, open-market transaction at $993.00 per share, and it reduced but did not eliminate his direct share holdings in the company.

At what price were Caton Frates’ Costco (COST) shares sold?

Caton Frates’ 700 Costco shares were sold at $993.00 per share. This was reported as an open-market sale of Common Stock and reflects the execution price disclosed for the transaction on the reported transaction date.

How many Costco (COST) shares does Caton Frates hold after the sale?

After selling 700 shares, Caton Frates directly holds 5,815.001 Costco shares. This figure represents his reported direct ownership position following the transaction and helps indicate that he retains a meaningful equity stake in the company.

Was the Costco (COST) insider transaction a buy or a sell?

The transaction was a sell. Executive Vice President Caton Frates executed an open-market sale of 700 shares of Costco Common Stock, as indicated by the “S” transaction code and the description of the transaction as a sale in the filing.

Did the Costco (COST) filing show any option exercises or derivatives for Caton Frates?

No, the filing shows no derivative transactions or option exercises for Caton Frates. It reports only one non-derivative transaction: the open-market sale of 700 shares of Common Stock, with derivative holdings listed as empty in the summary.

How significant is Caton Frates’ 700-share sale of Costco (COST) stock?

The filing shows a single sale of 700 shares, with Frates still holding 5,815.001 shares afterward. It is characterized as one open-market sale rather than a broad sell-down, suggesting a partial reduction in his direct position rather than a full exit.