The SEC places importance on sustainability-related information disclosures by the listed companies in accordance with international standards. The SEC has enhanced sustainability-related disclosure requirements for such companies in line with ISSB standards through a public consultation process, amendments to relevant regulations, and updates to disclosure requirements in 56-1 One Report-S or other related documents. These efforts aim to promote consistency and alignment in corporate reporting*, taking into account practical suitability within the context of Thailand’s capital market ecosystem and avoiding undue efforts or excessive costs for companies. The revisions also aim to ensure that investors will have comparable information to support their investment decisions. 

Following the public hearing, the SEC has decided to maintain the principles for the sustainability-related information disclosure in alignment with the ISSB Standards, requiring listed companies* to apply IFRS S1 and S2. In the initial phase, a climate-first reporting approach will be implemented, focusing on the disclosure of Scope 1 and Scope 2 GHG emissions, accompanied by standardized and reliable assurance. Listed companies are required to engage assurance providers, which may be verifiers registered with Thailand Greenhouse Gas Management Organization (Public Organization) (TGO) or other verifiers, which conduct assurance in accordance with internationally accepted assurance standards. In addition, the application of the standards will follow a phased-in approach, with transition relief measures provided. 

Additionally, the SEC viewed it appropriate to review and revise targeted on the principles related to the scope of reporting entities and the effective timelines, which were approved by the Capital Market Supervisory Board in November 2025. The key elements of the revised principles are as follows:     

1) Summary of Reporting Entities, Effective Timelines and Reporting Periods 

2) Company Classification Based on SET Index Groupings

    (1)  SET50 Index: Any listed company classified as a constituent of SET50 in December 2026 Index Review;

    (2)  SET100 Index: Any listed company classified as a constituent of SET100 in December 2027 Index Review.             

The SEC is in the process of amending relevant regulations and other related documents. Once completed, the SEC will communicate the final versions to all relevant stakeholders. Furthermore, to enhance the capabilities, knowledge and understanding, and facilitate a smooth transition for listed companies towards the ISSB Standards, the SEC will continue to implement capacity building initiatives through training programs, workshops and disclosure manuals in collaboration with local and international strategic partners.

Remarks:

* Listed companies subject to the reporting mandate as specified by the SEC include:   

          (1) Listed companies including Thai or foreign incorporation** or companies wishing to issue and offer for sale of shares to the public for the first time (Initial Public Offering: IPO), excluding non-listed companies, issuers and listed companies on LiVEx;   

          (2) Real Estate Investment Trust (REIT) listed on the Stock Exchange of Thailand;

          (3) Infrastructure Trust (Infra Trust) listed on the Stock Exchange of Thailand;

          (4) Property Fund (PF);         

          (5) Infrastructure Fund (IFF).  

 ** “Foreign company” refers to a foreign company whose shares are traded on the Stock Exchange, i.e., (1) shares issued by a foreign company whose shares are not listed on any foreign stock exchange (Primary Listing), and (2) shareholders of a foreign company, or the foreign company itself, whose shares are or will be listed on a foreign stock exchange (Secondary Listing / Dual Listing).