Investors are often guided by the idea of discovering 'the next big thing', even if that means buying 'story stocks' without any revenue, let alone profit. Sometimes these stories can cloud the minds of investors, leading them to invest with their emotions rather than on the merit of good company fundamentals. Loss making companies can act like a sponge for capital - so investors should be cautious that they're not throwing good money after bad.

If this kind of company isn't your style, you like companies that generate revenue, and even earn profits, then you may well be interested in NPK International (NYSE:NPKI). While profit isn't the sole metric that should be considered when investing, it's worth recognising businesses that can consistently produce it.

See our latest analysis for NPK International

How Fast Is NPK International Growing Its Earnings Per Share?

NPK International has undergone a massive growth in earnings per share over the last three years. So much so that this three year growth rate wouldn't be a fair assessment of the company's future. Thus, it makes sense to focus on more recent growth rates, instead. Impressively, NPK International's EPS catapulted from US$0.20 to US$0.38, over the last year. Year on year growth of 88% is certainly a sight to behold. Shareholders will be hopeful that this is a sign of the company reaching an inflection point.

One way to double-check a company's growth is to look at how its revenue, and earnings before interest and tax (EBIT) margins are changing. On the one hand, NPK International's EBIT margins fell over the last year, but on the other hand, revenue grew. So it seems the future may hold further growth, especially if EBIT margins can remain steady.

In the chart below, you can see how the company has grown earnings and revenue, over time. Click on the chart to see the exact numbers.

While we live in the present moment, there's little doubt that the future matters most in the investment decision process. So why not check this interactive chart depicting future EPS estimates, for NPK International?

Are NPK International Insiders Aligned With All Shareholders?

It's a necessity that company leaders act in the best interest of shareholders and so insider investment always comes as a reassurance to the market. So it is good to see that NPK International insiders have a significant amount of capital invested in the stock. Holding US$60m worth of stock in the company is no laughing matter and insiders will be committed in delivering the best outcomes for shareholders. At 9.0% of the company, the co-investment by insiders fosters confidence that management will make long-term focussed decisions.

Is NPK International Worth Keeping An Eye On?

NPK International's earnings per share have been soaring, with growth rates sky high. This level of EPS growth does wonders for attracting investment, and the large insider investment in the company is just the cherry on top. At times fast EPS growth is a sign the business has reached an inflection point, so there's a potential opportunity to be had here. So at the surface level, NPK International is worth putting on your watchlist; after all, shareholders do well when the market underestimates fast growing companies. While we've looked at the quality of the earnings, we haven't yet done any work to value the stock. So if you like to buy cheap, you may want to check if NPK International is trading on a high P/E or a low P/E, relative to its industry.

There's always the possibility of doing well buying stocks that are not growing earnings and do not have insiders buying shares. But for those who consider these important metrics, we encourage you to check out companies that do have those features. You can access a tailored list of companies which have demonstrated growth backed by significant insider holdings.

Please note the insider transactions discussed in this article refer to reportable transactions in the relevant jurisdiction.

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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.