The ASEAN Corporate Governance Scorecard (ACGS) was revised following a holistic and comprehensive review in 2016.The revised ACGS comprises five parts based on the Organisation of Economic Co-operation and Development’s principles: shareholders’ rights, equitable treatment of shareholders, stakeholders’ role, disclosure and transparency, and board responsibilities. In 2019, the ACGS was applied to 582 top publicly listed companies (PLCs) in the Association of Southeast Asian Nations members Indonesia, Malaysia, the Philippines, Singapore, Thailand, and Viet Nam. The mean total score in PLCs of the countries increased by 12% in 2019 compared to 2017, showing improvement in corporate governance practices.