Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

Is there still time to snap up this ex-penny stock in May?

A penny stock no more but a promising low-cap company nonetheless. Our writer examines the growth prospects of this sustainable solutions provider.

| More on:

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

Light bulb with growing tree.

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

While searching for exciting new penny stocks recently, a construction company with a focus on sustainability caught my eye. It’s not technically a penny stock anymore as its share price is above 100p. But with only a £66m valuation, it’s certainly up-and-coming.

Alumasc (LSE:ALU) is a UK-based supplier of sustainable building solutions aimed at preserving water, reducing energy, and utilising recyclable materials. It’s been awarded the London Stock Exchange’s Green Economy Mark for its contributions towards reducing waste and improving the environment.

Why should I care?

According to a recent report by the US auditing and advisory firm Deloitte, renewables are “set for a variable-speed takeoff as historic investment, competitiveness, and demand propel their development“.

The report goes on to detail how federal investment in clean energy has never been stronger. Nor has demand from public and private entities to accelerate decarbonisation efforts. In the UK, such initiatives are even more apparent. As a company that complements this industry, Alumasc is in good stead to reap the rewards of its growth.

It’s not going to be a smooth road, though. 

In many ways, the costs of renewable energy solutions still outweigh the benefits. Wind energy, for example, often costs more to implement and maintain than the value of the energy it produces. This has been a thorn in the side of the clean energy debate for years. And while Alumasc is not directly involved in renewable energy production, its success is tied to the perceived legitimacy of the wider industry.

Should the tide of favour turn away from sustainable energy solutions, demand for Alumasc’s products would likely dwindle. I think this is unlikely considering growing concerns regarding climate change but it’s still possible.

So is it a buy?

Alumasc is just one of many small business entities poised to benefit from the growing demand for a sustainable future. But it’s one that appears to have even greater growth potential than others I’ve evaluated.

The share price is up 94% in the past five years, despite suffering significant losses in 2022 as inflation dampened the economy. As such, the weakened price is estimated to be 34% undervalued using a discounted cash flow model. Strong earnings have also pushed the trailing price-to-earnings (P/E) ratio down to 8.3, almost half the industry average.

And the cherry on top? A 5.6% dividend yield that’s well-covered by earnings and supported by a decade of consistent payments. All things considered, I see a lot of good reasons why the shares still have more room to grow.

The bottom line

Investing in penny stocks is always a more risky prospect than large-cap established companies. In this instance, the cyclical nature of the construction industry combined with strong competition and commodity price fluctuations could threaten Alumasc’s profits.

So to stay ahead of the game, it has its work cut out for it. But if it pulls it off, it could be the next big name in sustainable solutions. If I were looking to add a penny stock to my portfolio today, this would be the one.

Mark Hartley has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Young woman holding up three fingers
Investing Articles

Want to start investing in 2026? 3 things to get ready now!

Before someone is ready to start investing in the stock market, our writer reckons it could well be worth them…

Read more »

Investing Articles

Can the stock market continue its strong performance into 2026?

Will the stock market power ahead next year -- or could its recent strong run come crashing down? Christopher Ruane…

Read more »

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

Here’s how someone could invest £20k in an ISA to target a 7% dividend yield in 2026

Is 7% a realistic target dividend yield for a Stocks and Shares ISA? Christopher Ruane reckons that it could be.…

Read more »

A quiet morning and an empty Victoria Street in Edinburgh's historic Old Town.
Investing Articles

How little is £1k invested in Greggs shares in January worth now?

Just how much value have Greggs shares lost this year -- and why has our writer been putting his money…

Read more »

Businessman using pen drawing line for increasing arrow from 2024 to 2025
Investing Articles

This cheap FTSE 100 stock outperformed Barclays, IAG, and Games Workshop shares in 2025 but no one’s talking about it

This FTSE stock has delivered fantastic gains in 2025, outperforming a lot of more popular shares. Yet going into 2026,…

Read more »

Close-up of British bank notes
Investing Articles

100 Lloyds shares cost £55 in January. Here’s what they’re worth now!

How well have Lloyds shares done in 2025? Very well is the answer, as our writer explains. But they still…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

How much do you need in an ISA to target £2,000 a month of passive income

Our writer explores a passive income strategy that involves the most boring FTSE 100 share. But when it comes to…

Read more »

Investing Articles

£5,000 invested in a FTSE 250 index tracker at the start of 2025 is now worth…

Despite underperforming the FTSE 100, the FTSE 250 has been the place to find some of the UK’s top growth…

Read more »