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  • Legal Update
  • | 28 March 2025

New Listing Rules for the Stock Exchange of Thailand

Paul Papon Charoenpao

Introduction

On 1 January 2025, the Stock Exchange of Thailand (“SET”) and the Market for Alternative Investment (“MAI”) amended their rules and requirements for the offering and listing of securities on the public market to better align with the evolving market demands and current business trends. This revision reflects a strategic effort to modernise the regulatory framework and ensure its relevance in today’s dynamic market, whilst also emphasising the stock exchange’s role on the Thai economy.

Key Revisions to Listing Rules

The key revisions to the Regulation of the Stock Exchange of Thailand Re: Listing of Ordinary Shares or Preferred Share as Listed Securities B.E. 2558 (2015) (“Amended Regulations”) are as follows:

  • Increased the net profits of the issuer to reflect good turnover.
  • Increased the shareholders’ equity requirement to demonstrate a strong financial position.
  • Reduced the paid-up capital requirement for listing in the SET, which remains higher than the previous minimum paid-up capital for the MAI to support companies with low paid-up capital but with good operating results and in a strong financial position.
  • Increased the distribution of minority shareholding (Free Float) and the proportion of shares offered for sale to the public (IPO) in order to improve liquidity in the secondary market.

Summary of the revisions to the Amended Regulations

  SET  MAI 
Previous  New  Previous  New 
1. Profit 

  • Latest year 
  • Preceding 2-3 years 
THB 30 million 

THB 50 million 

THB 75 million 

THB 125 million 

THB 10 million 

– 

THB 25 million 

THB 40 million 

2. Equity  THB 300 million  THB 800 million  THB 50 million  THB 100 million 
3. Paid-up Capital  THB 300 million  THB 100 million  THB 50 million  THB 50 million 
4. Free Float and Proportion of IPO (Applicable to both SET and MAI) 
Paid-up Capital (X)   % Free Float   Paid-up Capital (X)    % IPO  
50 < X < THB 300 million  30% (previously 25%)  50 < X < THB 300 million   20% (previously 15%) 
300 < X < THB 3,000 million   25%   300 < X < THB 500 million   15% or THB 60 million whichever is higher 
X > THB 3,000 million   20%   X > THB 500 million  10% or THB 75 million whichever is higher 

The number of minority shareholders and the share distribution ratio at the listing remain the same, with the SET requiring at least 1,000 minority shareholders and the MAI requiring at least 300 shareholders. The share distribution ratio for both markets is set between 20-30%. Previously, the Free Float Ratio for SET and MAI was:

  • ≥ 25% of paid-up capital; and
  • ≥ 20% if paid-up capital ≥ 3,000 million THB.

These changes reflect the SET’s commitment to elevating the standards and quality of the Thai capital market, which will positively impact the country’s long-term economic and investment development. However, continuous monitoring and assessment will be crucial to ensuring these changes deliver the maximum benefits to all stakeholders in the Thai capital market.

© PDLegal Thailand

This article is intended to provide general information only and does not constitute legal advice. It should not be used as a substitute for professional legal consultation. We recommend seeking legal advice before making any decisions based on the information available in this article. PDLegal fully disclaims responsibility for any loss or damage which may result from relying on this article.

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Further information 

Should you have any questions on how this article may affect you or your business, please get in touch with the following persons:

Paul Papon Charoenpao
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  • Legal Update
  • | 8 November 2025

The Arbitration (Amendment) Bill 2024 And CIPAA (Amendment) Bill 2024: Reshaping Malaysia's ADR Landscape

As we move towards the day that the Arbitration (Amendment) Act 2024 (“Arbitration Bill”) and the Construction Industry Payment and (...)

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