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C

COST

Nasdaq

COSTCO WHOLESALE CORP /NEW

Latest disclosureSeptember 30, 2026
Insider score Why 0?
0/ 100
Qualifying buys · 30d
$0

0 purchases · 4 sales

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Insider transactions 19

Limited filing history
All19Buying0Selling4Other15
Filters

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

0 of 19 trades · April 1, 2026 – September 29, 2026Incomplete history: this shows the filings imported so far, not every filing ever made. Dates are trade dates. Filters affect this table only.
No purchases match these filters in the loaded filings.

This reflects the filings imported so far, not a complete trading history.

Show all loaded activity
Explore furtherTechnical lab Company financials Test a strategy Compare company

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

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.

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 portraitRichard Dean Dr McCormickReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
July 30, 2026
Filed August 14, 2026 · 15d laterOriginal report
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
Filed July 21, 2026 · 116d laterOriginal report
Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for a spouse.

Dan Newhouse official portraitDan NewhouseReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
July 10, 2026
Filed July 17, 2026 · 7d laterOriginal report
Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portraitGilbert CisnerosReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
January 30, 2026
Filed February 13, 2026 · 14d laterOriginal report
Purchase disclosed

Costco Wholesale Corporation - Common Stock · Stock

The filing reports a purchase for a joint account.

Markwayne Mullin official portraitMarkwayne MullinReporting Senate member
Reported amount
$15,001 – $50,000Reported range; exact amount not disclosed.
Trade date
December 29, 2025
Filed January 16, 2026 · 18d laterOriginal report
Partial sale disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a partial sale for the member.

Gilbert Cisneros official portraitGilbert CisnerosReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
December 24, 2025
Filed January 12, 2026 · 19d laterOriginal report
Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for the member.

Richard Dean Dr McCormick official portraitRichard Dean Dr McCormickReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
November 5, 2025
Filed December 9, 2025 · 34d laterOriginal report
Purchase disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portraitGilbert CisnerosReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
October 17, 2025
Filed November 18, 2025 · 32d laterOriginal report
Purchase disclosed

Costco Wholesale · Stock

The filing reports a purchase for a joint account.

John Boozman official portraitJohn BoozmanReporting Senate member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
October 9, 2025
Filed November 15, 2025 · 37d laterOriginal report
Partial sale disclosed

Costco Wholesale · Stock

The filing reports a partial sale for a spouse.

Shelley M Capito official portraitShelley M CapitoReporting Senate member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
October 17, 2025
Filed November 4, 2025 · 18d laterOriginal report
Sale disclosed

Costco Wholesale Corporation - Common Stock (COST) · Stock

The filing reports a sale for a spouse.

Valerie Hoyle official portraitValerie HoyleReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
September 23, 2025
Filed October 10, 2025 · 17d laterOriginal report
Limited filing history · Market-wide discovery does not establish complete company history. View coverage