UK Penny Stocks: 3 Picks With Market Caps Under £400M

Simply Wall St

Thu, December 4, 2025 at 2:04 AM EST 4 min read

The United Kingdom’s stock market has recently faced challenges, with the FTSE 100 and FTSE 250 indices experiencing declines following weak trade data from China. Despite these broader market pressures, there remains potential for investors in smaller companies often referred to as penny stocks—a term that, although somewhat outdated, still points to opportunities within less-established firms. By focusing on those with strong financials and growth potential, investors can uncover promising prospects among these more affordable stocks.

Click here to see the full list of 305 stocks from our UK Penny Stocks screener.

Underneath we present a selection of stocks filtered out by our screen.

Simply Wall St Financial Health Rating: ★★★★★★

Overview: Borders & Southern Petroleum plc is an independent oil and gas exploration company operating in the Falkland Islands with a market cap of £96.67 million.

Operations: Borders & Southern Petroleum does not report any revenue segments.

Market Cap: £96.67M

Borders & Southern Petroleum, with a market cap of £96.67 million, operates as a pre-revenue company in the oil and gas exploration sector. Despite its unprofitability and volatile share price, it remains debt-free with sufficient cash runway for over a year. The company reported a reduced net loss of US$0.441 million for the half-year ending June 2025, compared to US$0.578 million previously. While shareholders have not faced dilution recently and short-term assets comfortably cover liabilities, earnings are forecasted to decline by an average of 8.6% annually over the next three years without any significant revenue streams currently in place.

• Click here and access our complete financial health analysis report to understand the dynamics of Borders & Southern Petroleum.

• Assess Borders & Southern Petroleum’s future earnings estimates with our detailed growth reports.

Simply Wall St Financial Health Rating: ★★★★★☆

Overview: CAB Payments Holdings Limited operates through its subsidiaries to offer foreign exchange and cross-border payment services to banks, fintech companies, supranationals, and governments both in the United Kingdom and internationally, with a market cap of approximately £133.28 million.