The problem of financial security is especially relevant for enterprises association participants in transition economies, in particular, it concerns agro-industrial companies. The paper is devoted to the study of methods for assessing the level of financial security of enterprises association participants. The purpose of the paper is to apply the methodology for assessing the level of financial security to members of groups of enterprises (which include agro-industrial enterprises), identifying issues and formulating recommendations on the example of «System Capital Management» JSC and «Metinvest Holding» LLC. The modern approaches of scientists to the interpretation of concepts and the use of methods for assessing the level of financial security are analyzed. The method of calculating the integral index of the level of financial security valuation was used and supplemented for the enterprises association participants. The use of integrated assessment indicator of financial security made it possible to identify the poor financial condition of enterprises association members. Suggested ways to achieve a sufficient level of financial security for enterprises association participants based on the research are proposed.