This research investigates the causal relationship of big data management with the organizational performance of Zenith Bank, Nigeria Plc. The primary aim was to assess how the components of big data management--storage, visualization, and analytics--enhance the bank’s operational efficiency and overall performance. A cross-sectional survey research design was employed, relying on primary data collected from management personnel at Zenith Bank branches in Delta State, Nigeria. Using a census sampling approach, the entire population of 32 management staff was included in the sample. The data were analyzed through linear regression techniques. The findings revealed that all three aspects of big data management--storage, visualization, and analytics--positively and significantly contribute to the bank’s performance. The study concludes that effective big data management is a strategic asset that fosters operational efficiency, promotes data-driven decision-making, and enhances organizational growth. It is recommended that financial institutions prioritize investments in advanced big data tools and infrastructure to maintain competitive advantages and achieve superior performance in an evolving financial landscape.