Is Costco (COST) The Most Expensive Stock Insiders Are Dumping In March?

Nina Zdinjak

Sun, Mar 30, 2025, 1:07 PM 4 min read

We recently published a list of 20 Most Expensive Stocks Insiders Are Dumping In March. In this article, we are going to take a look at where Costco Wholesale Corporation (NASDAQ:COST) stands against other most expensive stocks insiders are dumping in March.

After being in the green for a few trading sessions, the broader market index slid 0.8% on Wednesday, and blue-chip companies declined 0.1%. The NASDAQ Composite was down 1.6% in the early afternoon. On Tuesday, Trump provided an update on tariffs, saying they will likely be more “lenient than reciprocal,” suggesting a more relaxed approach, reports CNBC.

As investors process daily market developments, uncertainty continues to impact the market. In these periods, insider trading often attracts attention, as purchases of company stock by executives may suggest confidence in the company’s future. However, insider selling doesn’t necessarily imply a lack of faith—it may be driven by personal financial needs or a desire for diversification. Executives frequently rely on pre-established plans, such as 10b5-1, to maintain transparency. While insider trading can provide useful insights, it should be evaluated in the context of a company’s financial health, market trends, and industry changes.

What are some of the most expensive stocks insiders have been selling this month so far? To find out, we used Insider Monkey’s insider trading stock screener, focusing only on stocks where at least three insiders had sold shares in March. From there, we ranked the 20 stocks with the highest average price per share in times of sales.

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With each stock, we note the average price per share of these sales and the stock’s market capitalization.

A customer in a warehouse aisles, browsing the wide range of branded and private-label products.

Market Capitalization: $412.74 billion

Costco Wholesale Corporation (NASDAQ:COST) operates membership-only warehouse clubs in various countries, including the U.S., Canada, Mexico, Japan, and several others. The Issaquah, Washington-based company offers a wide range of products, from groceries and electronics to furniture and clothing, and also provides services like gas stations, pharmacies, and tire installation. Costco (NASDAQ:COST) generates significant profit through membership fees, which totaled $4.8 billion in fiscal 2024, and has seen a 7% annual increase in paid members over the last two years.