The Thailand Securities and Exchange Commission has amended its regulatory framework for Sustainable and Responsible Investing (SRI) funds, issuing four notifications that take effect on 16 December 2025. The changes tighten supervisory standards and transparency requirements across the SRI fund lifecycle, with the stated aim of reducing greenwashing risk and strengthening investor confidence. Asset management companies must define and disclose each SRI fund’s sustainability objectives and apply an SRI label that reflects the fund’s approach, including SRI Focus, SRI Improver, SRI Promote, SRI Impact, and SRI Mixed Goals. The regime also strengthens disclosure requirements from securities selection and sustainability assessment through to ongoing monitoring, introduces post-investment reporting on sustainability outcomes, and requires a dedicated “sustainability corner” in fund factsheets to summarise key sustainability information for comparability. Requirements for SRI Impact funds’ impact verifier are revised to provide more flexibility while maintaining alignment with international regulatory standards, and additional disclosure guidelines are set for SRI fund of funds and feeder funds. Existing registered SRI funds must update disclosures to comply within nine months from the notifications’ effective date, while other funds with sustainability-related names or investment policies have one year from the effective date to enhance disclosures.