In the last year, many Lockheed Martin Corporation (NYSE:LMT) insiders sold a substantial stake in the company which may have sparked shareholders' attention. Knowing whether insiders are buying is usually more helpful when evaluating insider transactions, as insider selling can have various explanations. However, when multiple insiders sell stock over a specific duration, shareholders should take notice as that could possibly be a red flag.

While we would never suggest that investors should base their decisions solely on what the directors of a company have been doing, we do think it is perfectly logical to keep tabs on what insiders are doing.

Check out our latest analysis for Lockheed Martin

Lockheed Martin Insider Transactions Over The Last Year

The Chief Operating Officer, Frank St. John, made the biggest insider sale in the last 12 months. That single transaction was for US$2.8m worth of shares at a price of US$428 each. So it's clear an insider wanted to take some cash off the table, even slightly below the current price of US$435. We generally consider it a negative if insiders have been selling, especially if they did so below the current price, because it implies that they considered a lower price to be reasonable. While insider selling is not a positive sign, we can't be sure if it does mean insiders think the shares are fully valued, so it's only a weak sign. It is worth noting that this sale was 100% of Frank St. John's holding.

Insiders in Lockheed Martin didn't buy any shares in the last year. You can see a visual depiction of insider transactions (by companies and individuals) over the last 12 months, below. If you want to know exactly who sold, for how much, and when, simply click on the graph below!

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

I like to look at how many shares insiders own in a company, to help inform my view of how aligned they are with insiders. We usually like to see fairly high levels of insider ownership. Lockheed Martin insiders own about US$52m worth of shares. That equates to 0.05% of the company. This level of insider ownership is good but just short of being particularly stand-out. It certainly does suggest a reasonable degree of alignment.

So What Does This Data Suggest About Lockheed Martin Insiders?

There haven't been any insider transactions in the last three months -- that doesn't mean much. Our analysis of Lockheed Martin insider transactions leaves us cautious. But we do like the fact that insiders own a fair chunk of the company. While it's good to be aware of what's going on with the insider's ownership and transactions, we make sure to also consider what risks are facing a stock before making any investment decision. At Simply Wall St, we found 1 warning sign for Lockheed Martin that deserve your attention before buying any shares.

But note: Lockheed Martin 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.