The Organization for Economic Co-operation and Development (OECD) had identified various corporate governance challenges in Asia, the most serious of these being the expropriation of minority shareholders. Since the 1997 Asian economic crisis, minority shareholder protection has become an area for focus as part of the overall movement to improve corporate governance of public listed companies in Thailand. The Stock Exchange of Thailand estimated that it has about nine million investors, directly and indirectly. A majority of these are minority shareholders who, left on their own accord, have little competitive advantage against controlling shareholders and their nominated corporate insiders. This study examines the protection of minority shareholders in public listed companies in Thailand by conducting a survey on a sample of 150 minority shareholders in order to derive recommendations for improvement of their protection.