Pinsent Masons says transfers from AIM to the London Stock Exchange’s Main Market have accelerated over the past year, with six companies moving in the last 12 months versus two in the previous year. The law firm said that would mark the strongest level of AIM-to-Main migration since 2016, pointing to a shift in how listed businesses are weighing regulation, investor access, and profile.
The backdrop is a market being reshaped by listing reform. The Financial Conduct Authority has been simplifying aspects of the UK listing regime, part of a broader attempt to improve the appeal of London’s public markets after a weak year for new issuance. Reuters reported in January that only nine companies floated on the LSE’s Main Market in 2025, reinforcing the pressure on regulators and exchanges to make the route more competitive and easier to navigate.
Pinsent Masons said recent transfers and proposed moves suggest listed companies are responding. Young’s has announced plans to move from AIM to the Main Market, while Brooks Macdonald completed its Main Market admission in March 2025. The law firm said the combination of regulatory change and a narrower gap between the two markets is making a transfer more accessible for businesses that want a broader shareholder base and higher visibility.
Nicholas Holmes, partner at Pinsent Masons and head of the firm’s equity capital markets practice, said: “The increase in transfers is an early vindication of the FCA’s recent listing reforms and shows that companies are beginning to respond.”
The reforms highlighted by the firm include a simpler listing structure, fewer shareholder approval requirements for major transactions, greater flexibility for founders to retain voting control, simplified eligibility criteria, and prospectus changes intended to make capital raising faster. For boards already weighing the cost and complexity of public market life, those adjustments materially alter the calculation.
Holmes said the appeal of the Main Market also remains structural. “The Main Market has always carried greater prestige. What has changed is that recent reforms have reduced some of the regulatory burdens associated with listing, making a move from AIM a more straightforward exercise for many companies.”
A Main Market listing can widen access to institutional capital and create a route into high-profile FTSE indices, bringing potential liquidity benefits and, in some cases, valuation support. Pinsent Masons said many of the largest funds still have mandates that limit them to Main Market stocks, which means the choice of venue can shape who is able to invest.
The firm added that AIM is now reviewing its own rules, setting up a fresh test for London’s junior market. For now, the rise in transfers suggests some companies see the Main Market less as a regulatory leap than as the next step once scale, investor ambition, and governance requirements begin to align.
