In the last year, many SLM Corporation (NASDAQ:SLM) insiders sold a substantial stake in the company which may have sparked shareholders' attention. 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 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 SLM

The Senior VP, Jonathan Boyles, made the biggest insider sale in the last 12 months. That single transaction was for US$1.9m worth of shares at a price of US$20.72 each. That means that even when the share price was below the current price of US$21.94, an insider wanted to cash in some shares. When an insider sells below the current price, it suggests that they considered that lower price to be fair. That makes us wonder what they think of the (higher) recent 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 90% of Jonathan Boyles's holding.

SLM 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. If you want to know exactly who sold, for how much, and when, simply click on the graph below!

I will like SLM 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 SLM Have Sold Stock Recently

The last quarter saw substantial insider selling of SLM shares. Specifically, Senior VP Jonathan Boyles ditched US$1.9m 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

For a common shareholder, it is worth checking how many shares are held by company insiders. I reckon it's a good sign if insiders own a significant number of shares in the company. SLM insiders own about US$51m worth of shares. That equates to 1.1% 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 Do The SLM Insider Transactions Indicate?

An insider hasn't bought SLM 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. On the plus side, SLM makes money, and is growing profits. Insiders own shares, but we're still pretty cautious, given the history of sales. We're in no rush to buy! In addition to knowing about insider transactions going on, it's beneficial to identify the risks facing SLM. At Simply Wall St, we've found that SLM has 5 warning signs (3 can't be ignored!) that deserve your attention before going any further with your analysis.

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.