Diamond Offshore Drilling, Inc. (NYSE:DO) shareholders might have a reason to worry after multiple insiders sold their shares over the last year. Knowing whether insiders are buying is usually more helpful when evaluating insider transactions, as insider selling can have various explanations. However, if numerous insiders are selling, shareholders should investigate more.

While we would never suggest that investors should base their decisions solely on what the directors of a company have been doing, we would consider it foolish to ignore insider transactions altogether.

The Last 12 Months Of Insider Transactions At Diamond Offshore Drilling

In the last twelve months, the biggest single sale by an insider was when the Senior VP & CFO, Dominic Savarino, sold US$171k worth of shares at a price of US$13.16 per share. That means that an insider was selling shares at around the current price of US$12.94. While we don't usually like to see insider selling, it's more concerning if the sales take place at a lower price. We note that this sale took place at around the current price, so it isn't a major concern, though it's hardly a good sign.

Diamond Offshore Drilling insiders didn't buy any shares over the last year. You can see a visual depiction of insider transactions (by companies and individuals) over the last 12 months, below. By clicking on the graph below, you can see the precise details of each insider transaction!

I will like Diamond Offshore Drilling better if I see some big insider buys. While we wait, check out this free list of growing companies with considerable, recent, insider buying.

Insiders At Diamond Offshore Drilling Have Sold Stock Recently

The last quarter saw substantial insider selling of Diamond Offshore Drilling shares. In total, insiders dumped US$231k worth of shares in that time, and we didn't record any purchases whatsoever. Overall this makes us a bit cautious, but it's not the be all and end all.

Insider Ownership

Many investors like to check how much of a company is owned by insiders. Usually, the higher the insider ownership, the more likely it is that insiders will be incentivised to build the company for the long term. Diamond Offshore Drilling insiders own about US$12m worth of shares. That equates to 0.9% of the company. We've certainly seen higher levels of insider ownership elsewhere, but these holdings are enough to suggest alignment between insiders and the other shareholders.

So What Does This Data Suggest About Diamond Offshore Drilling Insiders?

Insiders haven't bought Diamond Offshore Drilling stock in the last three months, but there was some selling. Looking to the last twelve months, our data doesn't show any insider buying. Insiders own shares, but we're still pretty cautious, given the history of sales. We'd practice some caution before buying! While we like knowing 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. You'd be interested to know, that we found 1 warning sign for Diamond Offshore Drilling and we suggest you have a look.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of interesting companies.

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.