Alector, Inc. (NASDAQ:ALEC) shareholders might have a reason to worry after multiple insiders sold their shares over the last year. When evaluating insider transactions, knowing whether insiders are buying versus if they selling is usually more beneficial, as the latter can be open to many interpretations. However, shareholders should take a deeper look if several insiders are selling stock over a specific time period.

Although we don't think shareholders should simply follow insider transactions, we do think it is perfectly logical to keep tabs on what insiders are doing.

View our latest analysis for Alector

Alector Insider Transactions Over The Last Year

In fact, the recent sale by Arnon Rosenthal was the biggest sale of Alector shares made by an insider individual in the last twelve months, according to our records. So it's clear an insider wanted to take some cash off the table, even below the current price of US$6.23. 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. However, while insider selling is sometimes discouraging, it's only a weak signal. This single sale was just 0.4% of Arnon Rosenthal's stake.

In the last year Alector insiders didn't buy any company stock. 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: insiders have been buying them).

Insiders At Alector Have Sold Stock Recently

The last quarter saw substantial insider selling of Alector shares. In total, insiders sold US$256k worth of shares in that time, and we didn't record any purchases whatsoever. In light of this it's hard to argue that all the insiders think that the shares are a bargain.

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. It appears that Alector insiders own 11% of the company, worth about US$57m. This level of insider ownership is good but just short of being particularly stand-out. It certainly does suggest a reasonable degree of alignment.

What Might The Insider Transactions At Alector Tell Us?

Insiders sold Alector shares recently, but they didn't buy any. And there weren't any purchases to give us comfort, over the last year. Insider ownership isn't particularly high, so this analysis makes us cautious about the company. We'd practice some caution before buying! So these insider transactions can help us build a thesis about the stock, but it's also worthwhile knowing the risks facing this company. At Simply Wall St, we found 3 warning signs for Alector that deserve your attention before buying any shares.

Of course Alector may not be the best stock to buy. So you may wish to see this free collection of high quality 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.