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The call is loud, clear, and long overdue: The Mansion House Accord has spoken. But its predecessor, the Mansion House Compact, spoke last year to urge UK pension funds to invest 5% of their assets in our own companies. Since then, a mighty 0.36% has been invested. Now the Accord urges 10% to be invested into private markets – with half of that targeted for UK growth assets, including AIM and Aquis. Believe it? Action speaks louder than words.
Show us action and show us the money. This has taken nearly two years, which is a hell of a long time in markets! Since the Compact was announced in July 2023, and the Accord was announced on 13 May 2025, by any school report the Compact failed. In 2024 alone, 89 companies left the UK AIM market. This highlights the UK ‘giving away’ our UK earning companies. And that’s deeply disappointing.
Next month marks AIM’s 30th birthday – a milestone that highlights just how embedded, tested, and vital this market is to the UK’s capital raising ecosystem. Since its inception in 1995, AIM has supported more than 4,000 companies to raise nearly £135 billion from a committed base of investors. It’s already battle-tested, open and built for growth. For pension fund allocators newly turning their heads toward UK assets, AIM is arguably the most investable segment of the growth market spectrum. This isn’t just about hope or patriotism - it’s about functioning capital markets with price discovery, governance, and investor access.
Local Government Pension Schemes (LGPS) have already made soft noises hinting toward investing in UK growth businesses, including unquoted companies and those listed on AIM. The next big step is for defined benefit pension schemes (DB schemes) to follow suit. That’s what the Accord now urges - a target of 10% into private markets by 2030, with at least 5% directed into UK companies.
But AIM can’t afford to wait until 2030. For many companies, the window of opportunity is now - not five years from now. And that’s why policy follow-through matters. If this happens, for those of us who’ve championed the UK’s public markets through lean times, it’s a moment of genuine celebration.
Personally, I am half-heartedly punching the air on this news. This is what we’ve been waiting for. But we need action and not talk. The last 12 months of provocation have paid the price – 89 companies have left the UK market due to being acquired, and many others have not come to market due to policy malaise.
Let’s not overstate it - or understate it. This is the most significant stance the UK government can take in a generation to back British business through capital markets. And unlike past headlines that have veered into unhelpful nationalism, this is pragmatic, targeted, and potentially transformative.
Of course, this optimism comes against a backdrop of real change. From April 2026, qualifying AIM shares held at the time of death will only be eligible for 50% relief rather than 100% from inheritance tax (IHT), resulting in an effective IHT rate of 20%- a major shift in the tax landscape.
And yes, many AIM stocks have found it difficult. Liquidity challenges, macro headwinds, and investor sentiment have all played a part. It may still get worse before it gets better.
But what’s kept us resilient is our approach: we’ve avoided the over-owned AIM BR names and instead focused on cash-generative, dividend-paying companies with real-world revenue and value. That’s why we believe AIM remains a credible, robust part of a diversified portfolio - not just for tax, but for long-term client outcomes.
Over the past decade, UK pension allocations to domestic equities have collapsed from around 20% to just 2%. Meanwhile, the US market - now wildly overweight in many portfolios - has become increasingly expensive, fragile, and unpredictable.
We’re not just buying mega-cap US stocks that no one can influence - we’re backing companies we can actually relate to - they’re in our backyard, they’re cheaper, and frankly, they’re better value.
The frustration has long been that UK-listed companies - especially in the AIM and small-cap space - are simply overlooked. Many investors haven’t heard of them. They don’t get analyst coverage. They fall through the cracks of passive screeners and global asset allocators.
But that’s where the real gems are.
Take Synectics, a specialist in surveillance and control systems. This week they secured a major contract with Stagecoach - the kind of practical, scalable innovation that thrives when given the capital and attention it deserves. Their stock is up 79.45% year-on-year. It’s not a fluke. It’s what happens when smart capital meets undervalued innovation.
The government’s guidance is expected to cover investments into UK growth companies - spanning unquoted businesses, those on Aquis, and the AIM market. But let’s be clear: AIM must not be left on the sidelines.
Many local government pension schemes have already begun exploring or supporting investment into these areas. But defined benefit and defined contribution schemes must now match this momentum — not with words or frameworks, but with actual allocation.
AIM is not just another option - it is the UK’s flagship growth market. It offers greater liquidity, transparency, and regulatory structure than many unquoted or junior markets.
I believe that AIM should stand up on its own merit. Too often it’s overlooked in favour of private equity, but in my opinion, the quality of companies and track record of delivery on AIM is unmatched. And the timing couldn’t be more fitting. Next month marks AIM’s 30th birthday - a milestone that highlights just how embedded, tested, and vital this market is to the UK’s capital-raising ecosystem.
Since its inception in 1995, AIM has supported more than 4,000 companies to raise nearly £135 billion from a committed base of investors. It’s already battle-tested. And for pension fund allocators newly turning their heads toward the UK, it’s arguably the most investable segment of the growth market spectrum. This isn’t just about hope or patriotism - it’s about functioning capital markets with price discovery, governance, and investor access.
There’s a growing shift in attention toward the opportunities within the UK’s growth economy - from policymakers, capital allocators, and institutional investors alike. For many, this renewed focus on investing at home is a first real look at AIM and its role in supporting scale-up businesses across the UK. This is a structural rebalancing in motion - from global overexposure back to domestic opportunity.
Because the truth is, there are companies on AIM right now delivering true value: growth, dividends, and resilience. They’ve long been overlooked - but they’re exactly where smart capital should be heading next. These AIM-listed companies are equal to those within private equity mandates. AIM is not the little sister to private equity.
Partner at Downing and Chair of the Quoted Companies Alliance (QCA)
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