What is the latest insider trading activity for COST?

The latest insider trading activity for Costco Wholesale (COST) includes SEC Form 4 filings detailing executive stock purchases and sales. Check the realtime table on this page for up-to-the-minute data on CEO and CFO transactions.

Who are the corporate insiders buying and selling COST stock?

Corporate insiders include C-level executives (CEO, CFO, COO), directors, and 10% owners of Costco Wholesale. Their transactions are legally required to be reported to the SEC via Form 4, which is tracked and displayed on this page.

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COST

Costco Wholesale Corporation

RetailDiscount Stores$404B Market Cap

Membership-only warehouse clubs, bulk retail, groceries. Track real-time insider trading activity, SEC Form 4 filings, and executive stock transactions.

SEC Form 4 Filings Stock Chart

Insider Sentiment

Based on recent trading activity

0%Bearish

Buy/Sell Ratio50% buys

BearishBullish

Insider Buys

Insider Sales

Total Volume

25 transactions

Net Activity

+$0

Net buying

Proprietary Ratings

Calculated from Form 4 transactions

50Confidence

Sentiment Rating

Neutral / Balanced

CEO Conviction Index

No Recent Signal

Key Drivers

•Balanced trading volume with net neutral buying and selling activity.

Score Methodology

The Insider Confidence Score (1-100) measures executive conviction. Starting from a neutral 50, it adjusts based on:

+15Strong Buy Ratio: Purchases > 70% of volume (or up to -15 for heavy sales).
+20Cluster Buying: ≥3 unique insiders buying within a 30-day window.
+15CEO Buying: CEO committing own capital shows high conviction.
+10CFO Buying: CFO purchasing shares shows financial alignment.

Sector & Industry

Retail Comparison

Industry Buy Conviction50%

COST Buy Conviction50%

Industry Rank#2 of 2

Volume Contribution0.0%

Total Industry Activity$0

COST has an insider buy conviction of 50%, compared to the Retail sector buy average of 50%. COST ranks #2 in insider activity out of 2 tracked companies in its industry.

Top Insiders

Most active traders

Multiple Insiders

S - Sale Insiders

0 buys25 sells

$0 total

Insider Trading Summary

Automated trend commentary

Over the last 90 days, corporate insiders at Costco Wholesale Corporation (COST) engaged in a total of 25 transactions reported via SEC Form 4 filings. Among these, 0 were open-market purchases and 0 were sales. The total volume of insider trading reached $0.

The net insider activity for COST shows a net buying bias of $0. This activity represents a 50% buy ratio, suggesting that insiders are currently neutral on the company's near-term outlook relative to recent history.

The most notable individual transaction was a Sale by Multiple Insiders (S - Sale Insiders), who traded 4.8K shares valued at $0 on Jun 23, 2026.

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Trading History

COST insider transactions from SEC Form 4 filings

Date	Insider	Type	Shares	Price	Value
Jun 23, 2026 3 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	4.8K	$-885.00	$0
Apr 1, 2026 6 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	5.8K	$-700.00	$0
Jan 21, 2026 8 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	4.2K	$-850.00	$0
Jan 16, 2026 8 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	8.5K	$-458.00	$0
Jan 14, 2026 8 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	44.9K	$-1500.00	$0
Jan 9, 2026 8 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	8.2K	$-1500.00	$0
Dec 29, 2025 9 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	10.2K	$-2607.00	$0
Nov 7, 2025 10 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	2.0K	$-2400.00	$0
Oct 24, 2025 11 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	5.2K	$-1239.00	$0
Sep 29, 2025 12 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	9.7K	$-3381.00	$0
Aug 20, 2025 13 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	2.4K	$-600.00	$0
Jul 14, 2025 14 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	5.8K	$-4000.00	$0
Jun 18, 2025 15 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	11.5K	$-547.00	$0
Jun 9, 2025 15 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	58.5K	$-3000.00	$0
Jun 6, 2025 15 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	8.2K	$-2000.00	$0
Apr 17, 2025 17 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	44.1K	$-4000.00	$0
Mar 27, 2025 18 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	11.2K	$-1100.00	$0
Mar 24, 2025 18 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	7.0K	$-900.00	$0
Mar 18, 2025 18 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	7.9K	$-850.00	$0
Mar 11, 2025 18 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	41.1K	$-3600.00	$0
Oct 24, 2024 23 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	35.1K	$-1416.00	$0
Oct 23, 2024 23 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	3.0K	$-800.00	$0
Oct 15, 2024 23 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	10.2K	$-2000.00	$0
Oct 11, 2024 23 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	10.2K	$-4400.00	$0
Sep 30, 2024 24 months ago	Multiple Insiders S - Sale Insiders Insider	Sell	8.6K	$-3200.00	$0

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FAQs About Costco Wholesale Corporation Insider Trading

Answers to common questions regarding corporate filings and executive sentiment for COST.

Based on SEC Form 4 disclosures, the Insider Confidence Score for COST is currently 50/100, which reflects a neutral / balanced bias. This calculation accounts for a total of 0 purchases and 0 sales by company executives over the last 90 days.

The CEO Conviction Index for COST is rated as "No Recent Signal". Executive buying is typically a strong vote of confidence as C-level leaders have the most intimate knowledge of their firm's prospects. Officer selling, on the other hand, is often routine and does not automatically signal operational weakness.

No. Insider tracking is a highly informative technical signal that indicates executive sentiment, but it should not be the sole basis for a transaction. Investors should combine this filing analysis with company financials, sector trends, and risk management criteria.

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What is the significance of the CEO Conviction Index for COST?

Does the insider trading data on Stock Insider AI replace standard investment research?