The purpose of this study is to investigate the impact of antidumping (AD) filings on profits of the firms in the subject industries with 17 Taiwanese AD cases over the period 1991-2008. Using an event study approach, we find that the Taiwan AD investigations yield an average abnormal gain of about 4.7%-6.1% to domestic firms producing the investigated products. In addition, the magnitude of the abnormal gains is determined by AD duties as well as the internal characteristics of the firms.