Cross-cultural dimensions have become as an essential factor for understanding miscellaneous type of social, economic and business environments. It can be define as a learned system of knowledge, attitudes, behaviors, belief and norms which are shared among a group of people in different nations or cultures. This study examines the effect of the ethical corporate cultural dimensions on the business participation and activities in Sri Lanka. The survey directed over the 181 employees who belong to four ethnic groups provided the data for empirical investigation. In order to test the hypothesis, correlation and regression techniques were basically applied. The study result clearly shows that, workplace collectivism has a strong and significant effect on the business activities and participation rather other underlined variables. Key Words: Collectivism, Group Loyalty and Cross Cultural Dimensions.