Over the past year, many Marathon Petroleum Corporation (NYSE:MPC) insiders sold a significant stake in the company which may have piqued investors' interest. When analyzing insider transactions, it is usually more valuable to know whether insiders are buying versus knowing if they are selling, as the latter sends an ambiguous message. However, when multiple insiders sell stock over a specific duration, shareholders should take notice as that could possibly be a red flag.

While insider transactions are not the most important thing when it comes to long-term investing, we would consider it foolish to ignore insider transactions altogether.

Check out our latest analysis for Marathon Petroleum

Marathon Petroleum Insider Transactions Over The Last Year

The Executive Vice President of Refining, Timothy Aydt, made the biggest insider sale in the last 12 months. That single transaction was for US$1.4m worth of shares at a price of US$173 each. So what is clear is that an insider saw fit to sell at around the current price of US$161. While we don't usually like to see insider selling, it's more concerning if the sales take place at a lower price. Given that the sale took place at around current prices, it makes us a little cautious but is hardly a major concern.

Marathon Petroleum insiders didn't buy any shares over the last year. You can see the insider transactions (by companies and individuals) over the last year depicted in the chart below. By clicking on the graph below, you can see the precise details of each insider transaction!

If you like to buy stocks that insiders are buying, rather than selling, then you might just love this free list of companies. (Hint: Most of them are flying under the radar).

Insider Ownership

Looking at the total insider shareholdings in a company can help to inform your view of whether they are well aligned with common shareholders. Usually, the higher the insider ownership, the more likely it is that insiders will be incentivised to build the company for the long term. Marathon Petroleum insiders own about US$105m worth of shares (which is 0.2% of the company). I like to see this level of insider ownership, because it increases the chances that management are thinking about the best interests of shareholders.

What Might The Insider Transactions At Marathon Petroleum Tell Us?

The fact that there have been no Marathon Petroleum insider transactions recently certainly doesn't bother us. While we feel good about high insider ownership of Marathon Petroleum, we can't say the same about the selling of shares. So while it's helpful to know what insiders are doing in terms of buying or selling, it's also helpful to know the risks that a particular company is facing. Our analysis shows 3 warning signs for Marathon Petroleum (1 is concerning!) and we strongly recommend you look at these before investing.

But note: Marathon Petroleum may not be the best stock to buy. So take a peek at this free list of interesting companies with high ROE and low debt.

For the purposes of this article, insiders are those individuals who report their transactions to the relevant regulatory body. We currently account for open market transactions and private dispositions of direct interests only, but not derivative transactions or indirect interests.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.