The article deals with current issues of digital transformation of metallurgical companies in the conditions of sustainable development of industry 4.0. The authors systematize the tools of through digitalization of companies in the metallurgical industry, give their characteristics, as well as proposed a mechanism for the impact of digital tools on the capital structure and financial stability. At the same time the analysis of the capital of the leading metallurgical company of Russia and the world JSC “Uralelectromed” confirms the necessity to consider the formation of the capital structure by digital methods of management in the aspect of sus-tainable development.