We think all investors should try to buy and hold high quality multi-year winners. While the best companies are hard to find, but they can generate massive returns over long periods. To wit, the SDI Group plc (LON:SDI) share price has soared 965% over five years. If that doesn't get you thinking about long term investing, we don't know what will. Anyone who held for that rewarding ride would probably be keen to talk about it.

Now it's worth having a look at the company's fundamentals too, because that will help us determine if the long term shareholder return has matched the performance of the underlying business.

View our latest analysis for SDI Group

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

Over half a decade, SDI Group managed to grow its earnings per share at 33% a year. This EPS growth is lower than the 60% average annual increase in the share price. This suggests that market participants hold the company in higher regard, these days. And that's hardly shocking given the track record of growth.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail). earnings-per-share-growth

We're pleased to report that the CEO is remunerated more modestly than most CEOs at similarly capitalized companies. It's always worth keeping an eye on CEO pay, but a more important question is whether the company will grow earnings throughout the years. It might be well worthwhile taking a look at our freereport on SDI Group's earnings, revenue and cash flow.

A Different Perspective

It's nice to see that SDI Group shareholders have received a total shareholder return of 74% over the last year. Since the one-year TSR is better than the five-year TSR (the latter coming in at 60% per year), it would seem that the stock's performance has improved in recent times. In the best case scenario, this may hint at some real business momentum, implying that now could be a great time to delve deeper. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Consider for instance, the ever-present spectre of investment risk.  We've identified 1 warning sign  with SDI Group , and understanding them should be part of your investment process.



If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this freelist of companies that have proven they can grow earnings.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on GB exchanges.

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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.