Stock Analysis

Possible Bearish Signals With National Grid Insiders Disposing Stock

In the last year, many National Grid plc (LON:NG.) insiders sold a substantial stake in the company which may have sparked shareholders' attention. 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 we would never suggest that investors should base their decisions solely on what the directors of a company have been doing, logic dictates you should pay some attention to whether insiders are buying or selling shares.

National Grid Insider Transactions Over The Last Year

Over the last year, we can see that the biggest insider sale was by the Executive Officer, John Pettigrew, for UK£1.8m worth of shares, at about UK£10.78 per share. That means that even when the share price was below the current price of UK£11.42, 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. However, while insider selling is sometimes discouraging, it's only a weak signal. This single sale was just 7.3% of John Pettigrew's stake.

In the last year National Grid 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 click on the chart, you can see all the individual transactions, including the share price, individual, and the date!

See our latest analysis for National Grid

insider-trading-volume
LSE:NG. Insider Trading Volume December 21st 2025

I will like National Grid better if I see some big insider buys. While we wait, check out this free list of undervalued and small cap stocks with considerable, recent, insider buying.

Does National Grid Boast High 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. It appears that National Grid insiders own 0.06% of the company, worth about UK£35m. 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 National Grid Insiders?

It doesn't really mean much that no insider has traded National Grid shares in the last quarter. Still, the insider transactions at National Grid in the last 12 months are not very heartening. But we do like the fact that insiders own a fair chunk of the company. In addition to knowing about insider transactions going on, it's beneficial to identify the risks facing National Grid. To help with this, we've discovered 2 warning signs (1 is a bit concerning!) that you ought to be aware of before buying any shares in National Grid.

But note: National Grid may not be the best stock to buy. So take a peek at this free list of interesting companies with high ROE and low debt.

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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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.

About LSE:NG.

National Grid

Engages in the transmission and distribution of electricity and gas.

Solid track record and fair value.

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