The relevance of the study is due to the need to solve the problem of identifying participants in network relationships for the purpose of subsequent research. This study was carried out within the framework of a network methodology, the development of the provisions of which is carried out on the basis of stakeholder and institutional approaches, which, by studying various collective forms of influence, form management tools for organizing networks in the economy, as well as innovation systems, industries and business clusters. In the course of approbation of the methodology for identifying subjects of network interaction in the industry of the region on the territory of the Sverdlovsk region, a network integrative structure was revealed in the industry "Production of drugs and materials used for medical purposes" uniting twelve economic entities that are legally independent from each other and have long-term contractual relationships, within the framework of which supplies of resources are made and eight economic entities that are intermediate consumers of products.