We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

2 exciting penny stocks under 20p to consider buying today

Penny stocks aren’t for everyone. But for those comfortable with risk, they can be worth considering as returns can be substantial.

| More on:
Engineer Project Manager Talks With Scientist working on Computer

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

Penny stocks tend to be risky investments. But they can generate spectacular returns at times, so they can be worth including in a diversified portfolio.

Here, I’m going to highlight two exciting penny stocks that I believe are worth a closer look today. Currently, both are trading for less than 20p.

Should you buy Corero Network Security Plc shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

High-risk, high-return

First up, we have Poolbeg Pharma (LSE: POLB). It’s an under-the-radar biopharmaceutical company that’s developing drugs (with the help of artificial intelligence) to address unmet medical needs.

Now, this is a classic penny stock in that it’s a high risk, high reward play. You see, this company doesn’t have any revenues or earnings at all today so it’s a very speculative investment.

But things could change. Currently, the company’s working on a range of drugs including products to treat cancer immunotherapy-induced Cytokine Release Syndrome (a condition that develops when an immune system responds too aggressively to infection) and obesity (it’s working on an oral weight-loss product).

If it was able to bring any of these drugs to the market, its revenues could explode. And so could its share price.

Of course, investors shouldn’t assume successful market launches will happen. Drug development’s a notoriously challenging industry in which major setbacks are the norm.

I see a lot of potential here though. I think Poolbeg Pharma’s worth considering as a speculative investment.

A high-growth industry

The other penny stock I want to highlight today is Corero Network Security (LSE: CNS). It’s a small cybersecurity company that specialises in Distributed Denial of Service (DDoS) protection solutions.

I see this stock as a little less risky than Poolbeg Pharma. That’s because the company already has revenues. Last year, these came in at $22.3m. This year, analysts expect $28m (growth of an impressive 26%).

That said, it’s still a very risky stock as the company’s profits are small. For 2024, net profit and earnings per share are only expected to come in at around $375,000 and 0.1 cents respectively.

Again though, I’m excited about the potential here. Cybersecurity’s a rapidly growing industry and this company’s having a lot of success at present, having recently signed a number of contacts with firms of different shapes and sizes.

If it can continue to do this and grow its revenues and earnings in the years ahead, I think it could turn out to be a decent investment. It’s worth noting that in July, the company said that it continues to experience high demand for its SmartWall ONETM DDoS protection solutions and that its pipeline is at record levels.

Of course, cybercrime’s always evolving. So there’s guarantee this company will continue to be successful going forward.

As a speculative investment however, I believe it’s worth a look.

Edward Sheldon 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 Micro-Cap Shares

Finger clicking a button marked 'Buy' on a keyboard
Investing Articles

Is this soaring penny share set for an explosive 2026?

This penny share company has suffered because its business has been through a tough time. But so far this year,…

Read more »

British Pennies on a Pound Note
Investing Articles

Here’s how Clean Power Hydrogen could be the next big penny stock winner in renewable energy

Mark Hartley takes a closer look at one of the most exciting penny stocks to emerge from the renewable energy…

Read more »

Investing Articles

Forecast: in 12 months, £500 invested in this penny share could be worth…

This penny share's already skyrocketed over 160% over the last two years… but one institutional analyst thinks it could climb…

Read more »

Investing Articles

£1,000 buys 1,408 shares in this penny stock that’s making a roaring comeback in 2026 due to AI growth

This penny stock was out of favour for a long time. However, the company has pivoted to AI solutions and…

Read more »

Close-up of children holding a planet at the beach
Investing Articles

Is ex-penny stock ITM Power one of the best growth investments in 2026?

Penny stocks rarely survive the hype cycle. But ITM Power's up 270% in 12 months! And this time, the surge…

Read more »

Close up of a group of friends enjoying a movie in the cinema
Investing Articles

Here’s how this 35p penny stock became the fifth-largest social media business in the UK — and it’s just getting started

Mark Hartley sees potential in an undervalued penny stock that’s catapulted up the ranks over the past few years. Could…

Read more »

Stack of one pound coins falling over
Investing Articles

3 penny shares tipped to surge in 2026

These penny shares have analyst targets suggesting up to 188% price rise potential in 2026. But are such explosive opportunities…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

Is penny stock Helium One a cheap buy at under 1p?

This penny stock trades at just 0.6p. But could it be sitting on one of the most exciting helium opportunities…

Read more »