This study sought to examine how the rational strategy implementation style influenced the performance of commercial state corporations in Kenya. This study employed the positivism research philosophy and a descriptive research design. The target population was 1813 staff working in middle-level management (job groups N-Q) in commercial state corporations in Kenya. The multistage sampling method was applied to draw 327 respondents from the target population. Data was collected using semi-structured questionnaires. Using linear regression analysis through the SPSS statistical software, this research study established that the rational strategy implementation style had a positive and significant influence on the performance of commercial state corporations in Kenya. Further, this study found that a control system, clear strategic objectives and following pre-arranged activities positively and significantly influenced the financial performance of commercial state corporations in Kenya. In addition, a control system and following pre-arranged activities positively and significantly influenced the customer satisfaction of commercial state corporations in Kenya, but clear strategic objectives had no statistically significant influence on the customer satisfaction of commercial state corporations in Kenya. This study concludes that adoption of the rational strategy implementation style enhances the performance of commercial state corporations in Kenya, and therefore recommends that in order to improve performance, the management of commercial state corporations should ensure that control systems are in place, that strategic objectives are clear, and that the implementation of strategy follows pre-arranged activities.