The excitement of investing in a company that can reverse its fortunes is a big draw for some speculators, so even companies that have no revenue, no profit, and a record of falling short, can manage to find investors. 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 F5 (NASDAQ:FFIV). While this doesn't necessarily speak to whether it's undervalued, the profitability of the business is enough to warrant some appreciation - especially if its growing.

See our latest analysis for F5

F5's Earnings Per Share Are Growing

If you believe that markets are even vaguely efficient, then over the long term you'd expect a company's share price to follow its earnings per share (EPS) outcomes. That makes EPS growth an attractive quality for any company. It certainly is nice to see that F5 has managed to grow EPS by 23% per year over three years. If growth like this continues on into the future, then shareholders will have plenty to smile about.

Top-line growth is a great indicator that growth is sustainable, and combined with a high earnings before interest and taxation (EBIT) margin, it's a great way for a company to maintain a competitive advantage in the market. The good news is that F5 is growing revenues, and EBIT margins improved by 2.8 percentage points to 25%, over the last year. Both of which are great metrics to check off for potential growth.

In the chart below, you can see how the company has grown earnings and revenue, over time. To see the actual numbers, click on the chart.

In investing, as in life, the future matters more than the past. So why not check out this free interactive visualization of F5's forecast profits?

Are F5 Insiders Aligned With All Shareholders?

Owing to the size of F5, we wouldn't expect insiders to hold a significant proportion of the company. But thanks to their investment in the company, it's pleasing to see that there are still incentives to align their actions with the shareholders. We note that their impressive stake in the company is worth US$146m. While that is a lot of skin in the game, we note this holding only totals to 0.8% of the business, which is a result of the company being so large. This should still be a great incentive for management to maximise shareholder value.

Should You Add F5 To Your Watchlist?

You can't deny that F5 has grown its earnings per share at a very impressive rate. That's attractive. Further, the high level of insider ownership is impressive and suggests that the management appreciates the EPS growth and has faith in F5's continuing strength. Fast growth and confident insiders should be enough to warrant further research, so it would seem that it's a good stock to follow. Still, you should learn about the 1 warning sign we've spotted with F5.

Although F5 certainly looks good, it may appeal to more investors if insiders were buying up shares. If you like to see companies with more skin in the game, then check out this handpicked selection of companies that not only boast of strong growth but have strong insider backing.

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.