Operational performance quantifies the effectiveness and efficiency with which a company carries out its internal procedures in order to meet its targets. It entails keeping an eye on and improving key performance indicators (KPIs) like cost effectiveness, quality, productivity, and customer satisfaction. By assessing and enhancing its operational performance, a company can lower expenses, boost investor satisfaction, and become more competitive. Operational performance is crucial for businesses for a variety of reasons. It can, first and foremost, have a big effect on a company’s bottom line. By enhancing operational performance, a company can raise revenue, cut expenses, and boost profitability. For instance, a manufacturing company’s sales and profits will rise if it can boost productivity and create more products using the same resources. The present study aimed to know the investment decisions among the stock market investors and the operational performance of privatized companies in the Malappuram District of Kerala. The study used a questionnaire method to collect the data from 120 respondents by applying convenience sampling. The study revealed that investors must measure operational performance in order to pinpoint problem areas and streamline procedures. Organizations may monitor their progress and make well-informed decisions to increase productivity and cut expenses by establishing quantifiable goals and monitoring key performance indicators (KPIs).