The aim of this study is to investigate the determinants of financial performance and market value of technology sector companies in Turkey. We used DuPont Analysis with Multiple Linear Regression method to evaluate which components of DuPont Analysis; Profitability, Asset Efficiency, Leverage, determine financial performance of technology companies at which level. Afterwards, with the aid of DuPont Analysis and Multiple Linear Regression method, market values of technology sector firms are investigated to understand which components of financial performance is related with market value in the sector. This study reveals that main determinants of financial performance of technology firms are profitability and asset efficiency respectively. This study also shows that asset efficiency and equity multiplier have positive impact on market value of technology firms but explanatory power of these variables are very low (R 2 =0,075). According to the results of this study, profitability does not explain market valuation of technology firms. The most important contribution of this study to the current literature is that components of financial performance are not sufficient to explain market value of technology firms in Turkey. There are different determinants of market value of technology firms rather than financial performance components such as profitability, asset utilization efficiency and capital structure.