This work examines the implementation by commercial enterprises and organizations of the concept of sustainable development, which is so relevant at present, with the help of such innovative financial instruments as “green” financing and social investment; the possibility and effectiveness of their use in the practice of managing a commercial organization is substantiated. The purpose of the presented research is to determine the possibility and economic feasibility of using such financial instruments as “green” finance and social investment in the practice of managing a commercial organization. The object of the study is the EFKO group of companies (RF, Belgorod region) – one of the largest food companies in the Russian Federation, the subject is “green” finance and social investments as innovative financial instruments that ensure the sustainable development of a commercial organization and an indicator of its effective management. According to the results of the study, it was established that for 30 years the company under study has been carrying out effective commercial activities, while carrying out active social investment, the object of which is both the internal environment of the organization (personnel, internal infrastructure, etc.) and the external environment (active environmental management, development territories, charity, etc.), ensuring the implementation of the concept of sustainable development. At the same time, it has been established that against the backdrop of an increase in the volume of investments for the implementation of social goals and objectives, there is a positive trend in the main indicators of economic activity and basic financial indicators. The forecast of the main performance indicators of the Group of Companies also allows us to draw a conclusion about the feasibility of implementing social investment, in general, and “green” financing, in particular, since against the backdrop of growing investments in their implementation, the forecast is positive. Undoubtedly, the practice of “green” financing and social investment is a tool for creating and maintaining a positive image and business reputation of the company, which is confirmed by the high results of an independent rating assessment, which has a positive effect on the investment attractiveness of the company and its competitiveness, and allows for a permanent increase in operational efficiency.