Small but mighty: ten under the radar funds for your ISA

By Staci West on 19 February 2026 in Income investing

When it comes to investing, it’s tempting to stick with the big, familiar names. The biggest funds, the ones everyone talks about or whatever happens to be trending online at the moment can feel like the safest bet. But building a good portfolio isn’t about putting all your eggs in one basket. Diversification is crucial.

Of course, it’s natural to follow the crowd. No one wants to feel like they’ve missed out and there’s an element of comfort in knowing lots of other people have made the same choice.

The downside? By only backing large, established funds, investors can miss out on smaller options that still have plenty of room to grow.

That’s where “pint-sized” funds come in. These are smaller, often under-the-radar investments that haven’t yet ballooned in size. They can be more flexible, more focused and sometimes better placed to spot opportunities early.

Below, we’ve rounded up ten pint-size funds to consider for your ISA this year. All our picks have less than £100m under management* and could be a handy way to add some extra flavour to the satellite part of your portfolio.

10 under the radar funds for your ISA

Three funds for UK exposure

Rathbone UK Opportunities — This is a flexible fund targeting quality growth businesses. The manager looks to take advantage of cheap UK valuations, but avoids the ex-growth, large-cap dinosaurs. She combines structural winners with a strong core of high-quality compounders and the final portfolio consists of around 50 to 60 holdings, with a bias to mid-cap stocks.

VT Tyndall Unconstrained UK Income — A high conviction, highly differentiated mid-cap focused UK income fund run by an experienced manager. The fund offers something different with its combination of premium yield and dividend growth stocks.

WS Raynar UK Smaller Companies — Launched in 2024 and managed by Philip Rodrigs, this UK smaller companies fund holds between 70 and 90 stocks. He favours firms with strong management teams and clear growth catalysts that are priced at attractive valuations. Although it’s early days for this fund, Philip has an exceptional track record and we see no reason why his strong performance cannot continue.

Three funds for additional equity exposure

FP Carmignac Emerging Markets — A high-conviction fund designed to capture the growth potential of large and mid-sized companies across emerging economies. The portfolio typically consists of 35–45 carefully-selected holdings, with a focus on sectors offering sustainable, long-term growth opportunities.

Matthews Pacific Tiger — This is a high-conviction, low turnover, low beta fund run by a well-resourced specialist team. The fund has an emphasis on domestically or regionally-oriented companies and favours mid and small-cap companies, which are under-represented in the indices relative to their large-cap peers.

Montanaro European Income — Managers Alex Magni and George Cooke focus on small and mid-sized businesses in Europe, which offer a huge choice of investments that are under-researched by the wider market. This fund offers something very different from its peers, as it looks to provide a stable and growing income stream from a broad range of European companies.

Two funds for fixed income

Artemis Global High Yield Bond — This is a high-conviction fixed income portfolio investing in 60-100 high yield issuers across the globe. We like the unique approach behind this fund, with the managers taking advantage of the inefficiencies created by many of their peers focusing heavily on the larger players in the index.

Rathbone Greenbank Global Sustainable Bond — If you’re looking for a versatile bond fund with a green lens, then this is a strong candidate. This global bond fund follows a ‘best ideas’ approach, focusing on sustainable themes aligned with the UN Sustainable Development Goals and investments that contribute to a more sustainable world.

Two multi-asset funds 

IFSL Wise Multi-Asset Income — This is an interesting alternative for those looking for an attractive income. The portfolio is high conviction and often uses investment trusts to tap into value opportunities, with alternative investments also accounting for a reasonable portion of the portfolio, giving investors a more diversified income stream.

Schroder Global Multi-Asset Cautious Portfolio — The fund aims to provide capital growth and income by investing in a diversified range of assets and markets worldwide, with a target average volatility (a measure of how much the fund’s returns may vary over a year) over a rolling five-year period of 4% per annum. It’s a strong consideration for any investor looking for a cost-competitive active solution, with a strong focus on risk.

*Source: FE Analytics, main units rebased in pounds sterling, 3 February 2026