RE: Hostilities still vast speculation19 Feb 2026 16:32
Regards main market listing……according to Gemini AI….
Moving from London's AIM (Alternative Investment Market) to the Main Market typically takes between 3 and 9 months.
Because there is no "fast-track" shortcut, the company must essentially undergo a new application process. While the company is already public, the regulatory "step-up" is significant and requires substantial preparation.
+1
1. Typical Timeline Breakdown
The speed of the move depends largely on how quickly the company can produce a Prospectus and whether it already meets Main Market governance standards.
Preparation (2–4 months): Appointing a Sponsor (Main Market version of a Nomad), legal advisors, and reporting accountants. This phase involves drafting the Prospectus and performing financial due diligence.
FCA Review & Approval (1–3 months): Unlike AIM, where documents are checked by the Nomad, the Financial Conduct Authority (FCA) must personally review and approve the Prospectus. This often involves multiple rounds of questions.
The "Notice" Period (20 business days): Under AIM rules, a company must give at least 20 business days' notice before cancelling its AIM listing to move to the Main Market.
2. Key Requirements That Impact Timing
The transition is more than just a paperwork exercise; certain eligibility criteria can delay the move if not already met:
Requirement Details
Market Cap: A minimum market capitalization of £30 million is required (though most companies wait until they are much larger, often £250m+).
Free Float: At least 10% of shares must be in "public hands."
Governance: The company must switch from the QCA Code to the more rigorous UK Corporate Governance Code (requiring more independent directors).
Prospectus A full Prospectus is usually required. However, if a company has been on AIM for 18+ months, it may be eligible for a "simplified" prospectus regime, which can save time and cost.
3. Why the Process Takes Time
The Sponsor's Role: On the Main Market, you must have a "Sponsor" (an investment bank or boutique) who takes legal responsibility for confirming to the FCA that the company is fit for listing. Their due diligence is often more exhaustive than an AIM Nomad’s.
Historical Financials: While recent 2024 reforms have eased some requirements, companies generally still need to provide three years of audited financial information prepared to International Financial Reporting Standards (IFRS).
Summary of Recent 2024/2025 Reforms
Following the UK Listing Rules (UKLR) overhaul in July 2024, the gap between AIM and the Main Market has narrowed. For example, the requirement for a three-year track record has been removed for the new ESCC (Equity Shares in Commercial Companies) category, potentially making the move faster for high-growth companies that haven't hit the three-year mark yet.
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