Many Comcast Corporation (NASDAQ:CMCSA) insiders ditched their stock over the past year, which may be of interest to the company's shareholders. 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 do think it is perfectly logical to keep tabs on what insiders are doing.

Comcast Insider Transactions Over The Last Year

In the last twelve months, the biggest single sale by an insider was when the Chairman & CEO, Brian Roberts, sold US$26m worth of shares at a price of US$41.92 per share. That means that an insider was selling shares at below the current price (US$41.93). As a general rule we consider it to be discouraging when insiders are selling below the current price, because it suggests they were happy with a lower valuation. 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. We note that the biggest single sale was only 2.3% of Brian Roberts's holding.

Insiders in Comcast didn't buy any shares in 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 are like me, then you will not want to miss this free list of small cap stocks that are not only being bought by insiders but also have attractive valuations.

Insider Ownership Of Comcast

For a common shareholder, it is worth checking how many shares are held by company insiders. We usually like to see fairly high levels of insider ownership. Comcast insiders own about US$1.5b worth of shares (which is 1.0% 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.

So What Do The Comcast Insider Transactions Indicate?

It doesn't really mean much that no insider has traded Comcast shares in the last quarter. It's heartening that insiders own plenty of stock, but we'd like to see more insider buying, since the last year of Comcast insider transactions don't fill us with confidence. 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. To assist with this, we've discovered 1 warning sign that you should run your eye over to get a better picture of Comcast.

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.