Top funds for Stocks & Shares ISA portfolios
Discover the top ISA investment funds purchased by ii customers.
Important information: As investment values can go down as well as up, you may not get back all the money you invest. If you're unsure about investing, please speak to an authorised financial adviser. Tax treatment depends on your individual circumstances and may be subject to change in the future.
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When you begin to invest, of course you want to know what the best Stocks & Shares ISA funds are. You want to make sure you’re putting your hard-earned money in the right places.
Here are the most purchased ISA funds our ii customers have invested in, updated monthly, to help inspire your own investing.
Most purchased ISA funds by ii customers
Here are the funds, investment trusts and ETFs that were most purchased by our ISA investors in June 2025. Our most popular investments should not be taken as personal recommendations to buy or sell a particular stock or fund, and are not intended to provide advice.
Why choose ii?
Keep more of what you make
Our low, flat fee means the more your investments grow, the more you can save. It’s a simple, transparent and convenient monthly cost.
Take control of your financial future
You’ll have access to one of the widest ranges of investments on the market. And with free regular investing, you can even save on trading fees.
Lean on our UK-based support
Get in touch with our award-winning customer service team with any questions. You can also stay informed with a wealth of insights from our experts.
Investment ideas
We've made it easy to find the right investments for your Stocks & Shares ISA.
Quick-start Funds
Easy, straightforward investing with six low-cost funds. A simple way to help get you started.
Super 60 investment list
Discover a range of rigorously selected investments, with quality options for any portfolio.
ACE 40 sustainable list
The UK's first rated list of sustainable investments to help you align investments with your personal values.
Aberdeen funds & trusts
Take a look at the Aberdeen funds and investment trusts available on the ii platform.
ISA Fund FAQs
The best investments for your Stocks & Shares ISA are personal to you. It all depends on your appetite for risk, your investment goals, and how much time you want to put into investing.
What we can say for sure is that you should be prepared to invest for at least five years. A stocks and shares ISA is long-term investment that aims to ride out the highs and lows of the market.
The best ISA funds are usually the ones which are aimed at long-term investing, are diversified and are low-cost. Take a look at the most purchased funds by ii customers to see which are the ISA funds that come out on top.
The answer to how many funds you should have in your ISA is personal to everyone. But if you’re just starting out, investing in a single, diversified fund can be a good and simple place to start.
Once your wealth starts to grow, and you’ve got more to grips with how the market operates, it can make sense to expand your portfolio holdings.
The only thing to note is, there is such a thing as too many funds. If you overdiversify this could reduce your potential for gains and lead to increased costs. If you want to dive deeper on this topic, read our article: How many funds should I own in my stocks and shares ISA?
If you’re new to investing, you’ll be pleased to know there’s lots of beginner-friendly funds to choose from. Multi-asset funds are often viewed as a good starting point, as they split your money across a range of different assets.
At ii, we offer several Quick-start Funds to get you started in investing, with each fund investing in both shares and bonds.
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Simply log in to apply. Your new Stocks & Shares ISA will automatically be added to your existing plan so you will continue to make the same monthly payment.
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