Penumbra (NYSE:PEN) has had a great run on the share market with its stock up by a significant 24% over the last three months. Given that stock prices are usually aligned with a company's financial performance in the long-term, we decided to study its financial indicators more closely to see if they had a hand to play in the recent price move. In this article, we decided to focus on Penumbra's ROE.

ROE or return on equity is a useful tool to assess how effectively a company can generate returns on the investment it received from its shareholders. In other words, it is a profitability ratio which measures the rate of return on the capital provided by the company's shareholders.

How Is ROE Calculated?

Return on equity can be calculated by using the formula:

Return on Equity = Net Profit (from continuing operations) ÷ Shareholders' Equity

So, based on the above formula, the ROE for Penumbra is:

3.1% = US$35m ÷ US$1.1b (Based on the trailing twelve months to September 2024).

The 'return' is the income the business earned over the last year. One way to conceptualize this is that for each $1 of shareholders' capital it has, the company made $0.03 in profit.

What Has ROE Got To Do With Earnings Growth?

Thus far, we have learned that ROE measures how efficiently a company is generating its profits. Based on how much of its profits the company chooses to reinvest or "retain", we are then able to evaluate a company's future ability to generate profits. Assuming all else is equal, companies that have both a higher return on equity and higher profit retention are usually the ones that have a higher growth rate when compared to companies that don't have the same features.

Penumbra's Earnings Growth And 3.1% ROE

It is quite clear that Penumbra's ROE is rather low. Even compared to the average industry ROE of 12%, the company's ROE is quite dismal. However, the moderate 17% net income growth seen by Penumbra over the past five years is definitely a positive. Therefore, the growth in earnings could probably have been caused by other variables. For example, it is possible that the company's management has made some good strategic decisions, or that the company has a low payout ratio.

We then compared Penumbra's net income growth with the industry and we're pleased to see that the company's growth figure is higher when compared with the industry which has a growth rate of 12% in the same 5-year period.

The basis for attaching value to a company is, to a great extent, tied to its earnings growth. It's important for an investor to know whether the market has priced in the company's expected earnings growth (or decline). By doing so, they will have an idea if the stock is headed into clear blue waters or if swampy waters await. Is Penumbra fairly valued compared to other companies? These 3 valuation measures might help you decide.

Is Penumbra Using Its Retained Earnings Effectively?

Penumbra doesn't pay any regular dividends, meaning that all of its profits are being reinvested in the business, which explains the fair bit of earnings growth the company has seen.

Summary

Overall, we feel that Penumbra certainly does have some positive factors to consider. Despite its low rate of return, the fact that the company reinvests a very high portion of its profits into its business, no doubt contributed to its high earnings growth. With that said, the latest industry analyst forecasts reveal that the company's earnings are expected to accelerate. To know more about the company's future earnings growth forecasts take a look at this free report on analyst forecasts for the company to find out more.

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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.