The present study aimed to investigate the effect of business intelligence adoption on the performance of bank support services companies with an emphasis on the mediating role of agility. To this end, a case study was conducted on Sepah Bank branches in Shiraz. The methodology of this study is of an applied and descriptive-survey type, and the statistical population includes all employees of Sepah Bank branches and those of Omid Net Infrastructure Support Company in Shiraz. The sample size was determined to include 310 people using the Krejcie and Morgan’s (1970) table, and simple random sampling method was used to select the sample. Data were collected through a questionnaire and its reliability was confirmed by means of the Cronbach's alpha coefficient being higher than 0.7. The results of the analysis show that agility acts as a mediating variable between business intelligence adoption and the performance of bank support services companies. Also, the tendency towards entrepreneurship has the greatest impact on the performance of these companies. This research helps to explain and clarify the role of business intelligence and agility in improving the performance of bank support services companies and can help managers of these organizations in making strategic and operational decisions. The results of this research can be the basis for future studies revolving around the performance improvement of organizations based on business intelligence and agility.