| This study aims to examine the effect of capital structure on company performance, each of which is measured by DER (Debt to Equity Ratio) and ROA (Return On Asset). In addition, this study also aims to examine the effect of ownership structure on company performance, each of which is measured by the index of Herfindahl and Tobin's Q. The sample used in this study were 18 non-financial companies which continuously listed in LQ45 Index on Indonesia Stock Exchange during the 2009¬2010 period. This study uses simple regression analysis and SPSS 17.0 to analyze the data. The result showed that capital structure affects negatively and significant to the company performance and the ownership structure affects positively and significant to the company performance. |