Good corporate governance practices reduce vulnerability to financial crises, reinforce property rights, reduce the cost of capital, and lead to greater capital market development. In this fourth edition of the Association of Southeast Asian Nations (ASEAN) Corporate Governance initiative of the Asian Development Bank and the ASEAN Capital Markets Forum, over 500 top publicly listed companies from six ASEAN countries were assessed. In depth analysis of each country including rights of shareholders, equitable treatment of shareholders, role of stakeholders, disclosure and transparency, and responsibilities of the board are discussed.