The study investigated the relationship between stock control and management of costs at Mukwano Group of Companies, Uganda's leading manufacturing conglomerate. The research examined how inventory management practices, stock recording systems, stock valuation methods, and reorder level management influenced cost management outcomes including inventory holding costs, stockout costs, ordering costs, and overall operational efficiency. A descriptive cross-sectional survey design was employed, involving 168 employees from procurement, stores, and finance, production, and management departments across Mukwano's multiple manufacturing facilities. Data were collected through structured questionnaires and analyzed using Pearson correlation and multiple regression analysis. Results revealed a significant positive relationship between stock control and cost management (r=0.794, p