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Costain Group PLC's (LON:COST) Stock Has Been Sliding But Fundamentals Look Strong: Is The Market Wrong?

Simply Wall St · 08/21 05:00
LSE:COST 1 Year Share Price vs Fair Value
LSE:COST 1 Year Share Price vs Fair Value
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Costain Group (LON:COST) has had a rough week with its share price down 18%. However, stock prices are usually driven by a company’s financial performance over the long term, which in this case looks quite promising. Particularly, we will be paying attention to Costain Group's ROE today.

Return on Equity or ROE is a test of how effectively a company is growing its value and managing investors’ money. In short, ROE shows the profit each dollar generates with respect to its shareholder investments.

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How Is ROE Calculated?

ROE 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 Costain Group is:

13% = UK£31m ÷ UK£236m (Based on the trailing twelve months to June 2025).

The 'return' is the profit over the last twelve months. That means that for every £1 worth of shareholders' equity, the company generated £0.13 in profit.

See our latest analysis for Costain Group

Why Is ROE Important For Earnings Growth?

So far, we've learned that ROE is a measure of a company's profitability. 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. Generally speaking, other things being equal, firms with a high return on equity and profit retention, have a higher growth rate than firms that don’t share these attributes.

Costain Group's Earnings Growth And 13% ROE

At first glance, Costain Group seems to have a decent ROE. And on comparing with the industry, we found that the the average industry ROE is similar at 15%. This certainly adds some context to Costain Group's exceptional 83% net income growth seen over the past five years. We reckon that there could also be other factors at play here. 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 Costain Group'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 34% in the same 5-year period.

past-earnings-growth
LSE:COST Past Earnings Growth August 21st 2025

Earnings growth is a huge factor in stock valuation. The investor should try to establish if the expected growth or decline in earnings, whichever the case may be, is priced in. By doing so, they will have an idea if the stock is headed into clear blue waters or if swampy waters await. If you're wondering about Costain Group's's valuation, check out this gauge of its price-to-earnings ratio, as compared to its industry.

Is Costain Group Making Efficient Use Of Its Profits?

Costain Group has a really low three-year median payout ratio of 12%, meaning that it has the remaining 88% left over to reinvest into its business. This suggests that the management is reinvesting most of the profits to grow the business as evidenced by the growth seen by the company.

Moreover, Costain Group is determined to keep sharing its profits with shareholders which we infer from its long history of paying a dividend for at least ten years. Our latest analyst data shows that the future payout ratio of the company is expected to rise to 23% over the next three years. However, the company's ROE is not expected to change by much despite the higher expected payout ratio.

Conclusion

In total, we are pretty happy with Costain Group's performance. Particularly, we like that the company is reinvesting heavily into its business, and at a high rate of return. Unsurprisingly, this has led to an impressive earnings growth. Having said that, the company's earnings growth is expected to slow down, as forecasted in the current analyst estimates. Are these analysts expectations based on the broad expectations for the industry, or on the company's fundamentals? Click here to be taken to our analyst's forecasts page for the company.