Regulations relaxed

The biggest overhaul of the AIM (Alternative Investment Market) in years has become effective, with the London Stock Exchange (LSE) introducing reforms designed to reduce regulatory burdens, support fundraising and make AIM a more attractive market for growing businesses.

The changes come as the stock market for small businesses and high-growth companies faces an existential risk. Tax changes, poor valuations, reduced risk appetite and greater competition for funding have reduced its attractiveness.

According to financial markets platform Dealogic, nearly 1,700 companies were listed on AIM in 2007. This fell to 605 this year, while the market valuations have fallen by over a third.

The AIM also faces competition from the newly launched Private Intermittent Securities and Capital Exchange System (Pisces), a secondary trading market for private company shares.

In an effort to make the AIM more attractive, the LSE announced new rules on 5 August 2026 that are intended to strike a balance between investor protection and the needs of ambitious growth companies. For businesses considering an AIM listing, acquisition strategy or future fundraising, the changes could have significant implications.

Working capital statement removed

One of the most significant reforms is the removal of the traditional working capital statement from AIM admission documents.

Previously, directors were required to confirm that a company had sufficient working capital for at least 12 months following admission. Under the new rules, this requirement is replaced with enhanced disclosures covering:

  • Material capital resources.
  • Financial obligations.
  • Use of fundraising proceeds.
  • Directors’ assessment of future funding requirements over the next 12 months.

The change should give investors a fuller picture of a company’s financial position rather than relying on a single formal statement. Underlying financial due diligence remains essential, particularly for businesses that may need future fundraising to support growth.

New capital access window

AIM companies can now request a temporary suspension of trading while undertaking an equity fundraising.

The new voluntary ‘capital access window’ is designed to provide companies with greater control over fundraising negotiations and reduce market volatility during the process. This could prove particularly useful for smaller businesses seeking to raise capital without exposing sensitive discussions to immediate market reaction.

Reverse takeover rules relaxed

The definition of a reverse takeover has been significantly narrowed. Previously, shareholder approval was generally required when a transaction exceeded 100% under AIM’s class tests. Under the revised rules, transactions will only be classified as reverse takeovers if they result in a fundamental change of the company’s business, board or voting control.

As a result, some large acquisitions that would previously have required shareholder approval may now proceed more quickly, provided they do not fundamentally transform the company.

Higher threshold for substantial transactions

The threshold for a substantial transaction has increased from 10% to 25%. This aligns AIM more closely with the Main Market and will reduce the number of transactions that fall within the substantial transaction regime. For acquisitive businesses, this should lower compliance costs and simplify execution of smaller acquisitions and disposals.

Faster route to market

The former Designated Market Route has been replaced by a new Express Market Route.

The revised framework widens eligibility to companies from more jurisdictions and shortens the required Schedule One announcement period to three business days. In addition, a new dual-admission route allows companies seeking simultaneous admission to both AIM and an approved overseas market to rely on their existing admission documentation, provided they raise at least £6 million.

Governance and founder-friendly reforms

Measures have been introduced to make AIM more attractive to founder-led businesses. Companies can now introduce special voting shares at admission, enabling founders to retain enhanced control after listing. Unlike some international markets, AIM has not imposed a mandatory sunset clause, leaving investors to assess the structure as part of their investment decision.

Another notable reform is the removal of the requirement for AIM companies to adopt a recognised corporate governance code on a ‘comply or explain’ basis. Instead, businesses must disclose information across five prescribed governance areas, allowing greater flexibility for companies at different stages of development.

Greater focus on investor responsibility

The revised rules introduce a prominent ‘buyer beware’ statement that must appear at the front of AIM admission documents.

This reinforces the principle that investors should undertake their own due diligence when evaluating AIM-listed companies. AIM companies are also now expressly permitted to respond to market rumours and third-party commentary when they believe information circulating in the market may be inaccurate or misleading.