Over the past year, many NiSource Inc. (NYSE:NI) insiders sold a significant stake in the company which may have piqued investors' interest. 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 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.

Check out our latest analysis for NiSource

NiSource Insider Transactions Over The Last Year

In the last twelve months, the biggest single sale by an insider was when the insider, Donald Brown, sold US$1.0m worth of shares at a price of US$26.78 per share. That means that an insider was selling shares at slightly below the current price (US$36.57). 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. Please do note, however, that sellers may have a variety of reasons for selling, so we don't know for sure what they think of the stock price. It is worth noting that this sale was only 18% of Donald Brown's holding.

NiSource insiders didn't buy any shares over the last year. The chart below shows insider transactions (by companies and individuals) over the last year. If you click on the chart, you can see all the individual transactions, including the share price, individual, and the date!

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NiSource Insiders Are Selling The Stock

Over the last three months, we've seen significant insider selling at NiSource. Specifically, insiders ditched US$357k 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 Of NiSource

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. Usually, the higher the insider ownership, the more likely it is that insiders will be incentivised to build the company for the long term. Insiders own 0.3% of NiSource shares, worth about US$49m. 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 NiSource Insiders?

Insiders haven't bought NiSource stock in the last three months, but there was some selling. And there weren't any purchases to give us comfort, over the last year. But since NiSource is profitable and growing, we're not too worried by this. Insiders own shares, but we're still pretty cautious, given the history of sales. So we'd only buy after careful consideration. 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. Our analysis shows 3 warning signs for NiSource (1 is a bit concerning!) and we strongly recommend you look at them before investing.

Of course NiSource 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.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.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.