COST

Nasdaq

COSTCO WHOLESALE CORP /NEW

Latest disclosureSeptember 30, 2026

Insider score Why 0?: 0/ 100
Qualifying buys · 30d: $0

0 purchases · 4 sales

Price by TradingView

Insider transactions 19

Limited filing history

Filters

Last 30 daysNo qualifying insider buying. Sales: $2.75M by 2 insiders.

Sale disclosed

Caton Frates

Sr. Executive Vice President

Common Stock

Reported value: $733.33K
Reported price: $915.93 / share

Sale disclosed

Claudine Adamo

Executive Vice President

Common Stock

Reported value: $2.02M
Reported price: $915.93 / share

Sale disclosed

Kenneth D. Denman

Director

Common Stock

Reported value: $847.35K
Reported price: $957.4525 / share

Sale disclosed

Caton Frates

Executive Vice President

Common Stock

Reported value: $695.1K
Reported price: $993.00 / share

Reporting insider	Security / transaction	Amount / price	Value	Traded / disclosed	Source
Sr. Executive Vice President	Common StockSale	801$915.93 / share	$733.33K	Sep 29Filed Sep 30 · 1d later	SEC filing
Executive Vice President	Common StockSale	2,200$915.93 / share	$2.02M	Sep 29Filed Sep 30 · 1d later	SEC filing
Director	Common StockSale	885$957.45 / share	$847.35K	Jun 23Filed Jun 25 · 2d later	SEC filing
Executive Vice President	Common StockSale	700$993.00 / share	$695.1K	Apr 1Filed Apr 1 · 0d later	SEC filing

Congress transactions 11

All Congress filings

Sale disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a sale for the member.

Richard Dean Dr McCormick official portrait

Richard Dean Dr McCormickReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: July 30, 2026

Purchase disclosed

Costco Wholesale Corporation - Common Stock · Stock

The filing reports a purchase for the member.

AAAlan ArmstrongReporting Senate member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: March 27, 2026

Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for a spouse.

Dan NewhouseReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: July 10, 2026

Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for the member.

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: January 30, 2026

Purchase disclosed

Costco Wholesale Corporation - Common Stock · Stock

The filing reports a purchase for a joint account.

Markwayne MullinReporting Senate member

Reported amount: $15,001 – $50,000Reported range; exact amount not disclosed.
Trade date: December 29, 2025

Partial sale disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a partial sale for the member.

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: December 24, 2025

Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for the member.

Richard Dean Dr McCormickReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: November 5, 2025

Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for the member.

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: October 17, 2025

Purchase disclosed

Costco Wholesale · Stock

The filing reports a purchase for a joint account.

John BoozmanReporting Senate member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: October 9, 2025

Partial sale disclosed

Costco Wholesale · Stock

The filing reports a partial sale for a spouse.

Shelley M CapitoReporting Senate member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: October 17, 2025

Sale disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a sale for a spouse.

Valerie HoyleReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: September 23, 2025

Why this buying score?

No qualifying common-equity purchases

No eligible common-equity purchase is public by this cutoff within 180 transaction-date days. Other instruments, exercises and routine activity do not contribute purchase points.

+0 pts

This score describes qualifying insider purchases at issuer level. Read the methodology

Sources and coverage

Limited filing history · Market-wide discovery does not establish complete company history. View coverage

Source: SEC EDGAR · Form 4
Issuer CIK: 0000909832
Latest public acceptance: Sep 30, 2026, 09:52 PM UTC
Score calculated: Oct 8, 2026, 12:04 AM UTC
Parser: form4-parser-1.5
Classifier: form4-classifier-1.1
Scoring methodology: insider-experimental-1.1
Availability: Public filing time, not trade date

Open a transaction's SEC filing for the primary evidence. A code P may describe an open-market or private purchase; classification is not proof of intent.

Insider activity can have many explanations. Signal Strength is not a probability of profit or a recommendation to trade.

Reporting insider

Security / transaction

Amount / price

Value

Traded / disclosed

Source

Sr. Executive Vice President

Common StockSale

801$915.93 / share

$733.33K

Sep 29Filed Sep 30 · 1d later

SEC filing

Executive Vice President

Common StockSale

2,200$915.93 / share

$2.02M

Sep 29Filed Sep 30 · 1d later

SEC filing

Director

Common StockSale

885$957.45 / share

$847.35K

Jun 23Filed Jun 25 · 2d later

SEC filing

Executive Vice President

Common StockSale

700$993.00 / share

$695.1K

Apr 1Filed Apr 1 · 0d later

SEC filing

Why this buying score?

No qualifying common-equity purchases

No eligible common-equity purchase is public by this cutoff within 180 transaction-date days. Other instruments, exercises and routine activity do not contribute purchase points.

+0 pts

This score describes qualifying insider purchases at issuer level. Read the methodology

Sources and coverage

Limited filing history · Market-wide discovery does not establish complete company history. View coverage

Source: SEC EDGAR · Form 4
Issuer CIK: 0000909832
Latest public acceptance: Sep 30, 2026, 09:52 PM UTC
Score calculated: Oct 8, 2026, 12:04 AM UTC
Parser: form4-parser-1.5
Classifier: form4-classifier-1.1
Scoring methodology: insider-experimental-1.1
Availability: Public filing time, not trade date

Open a transaction's SEC filing for the primary evidence. A code P may describe an open-market or private purchase; classification is not proof of intent.