B corps certified companies appeared to reduce greenwashing and have transparency in companies’ social responsibilities. Since B corps in the UK is a newcomer, there is not much research; hence, this study aims to analyze B corps’ performance in the UK and the power of BIA as a CSR indicator. The study is based on the triple bottom line theory by having 172 B corps and data gathered in a qualitative and quantitative method and in an inductive way. Some Information about the growth rate of B corps, Average Size of companies, employees, BIA, and sectors were extracted. As a result, two companies from the food & beverage sectors were selected, and their performance in years of being B corps evaluated.