Knowledge sharing culture (KSC) and intellectual capital (IC) are two significant sources in achieving a competitive advantage and are essential for long-term success of any organization. Intellectual capital is the sum of all knowledge used to develop the process of conducting business to gain competitive advantages. However, the role of organizations’ KSC in building IC and supporting organizational performance has received limited attention, although KSC creates a context of shared values, which fosters learning and knowledge development. The main aim of this research paper is to explore how KSC and IC (human, structural and relational capital) influences organizational performance. Through a quantitative survey of 140 employees from 37 organizations in Saudi Arabia, we confirm our hypotheses that KSC is positively related to IC, and that human and relational capital is in turn positively related to organizational performance. However, we found no relationship between structural IC and organizational performance.