Controlling, as an advisory function of management, reflects on the quality of company management at the strategic, tactical and operational levels. To a large extent, it contributes to the timely and quick reaction of the management to changes inside and outside the organization and thus minimizes risks and optimizes operations. At the same time, the application of appropriate controlling instruments affects the efficiency and effectiveness of business operations. The purpose of the research was to determine the role and contribution of controlling in the stabilization of Pevex’s operations after restructuring, as well as management’s perception and the role of controlling instruments in operations. In order to examine the established relationships, research was conducted using the semi-interview method with company management and analysis of f inancial statements and selected business financial indicators, as well as SWOT and TOWS analysis. The results of the research showed that there is a significant role and contribution of controlling in the stabilization of business after the restructuring of Pevex. Controlling greatly contributed to the adjustment of the business strategy, which affected business indicators measured by liquidity, profitability, economy, profitability and indebtedness. Management’s perception is that the use of controlling instruments contributes to the organization’s management processes and the achievement of the organization’s set goals. Based on information from the company itself, the controlling system at Pevex is presented, its contribution to management in making business decisions, and recommendations for further development are given. Primary data sources from the company itself and secondary data sources (annual financial reports) were used for the analysis.