In the conditions of globalization of social and economic processes, growth of dynamism and uncertainty of factors of environment network interaction of economic agents, especially in the innovative sphere, becomes the important instrument of formation of competitive advantage due to access to various combinations of ideas, advanced knowledge and technologies, unique resources. In this regard in article methodological basics of creation of intercompany networks are covered: the categories opening the maintenance of intersubject networks, dual approach to structural interaction of subjects of innovative activity, theoretical prerequisites of formation of mechanisms of formation of network structures (the theory of information, chaos, synergetrics, nonequilibrium thermodynamics). The practice of network interaction within the portfolios of alliances created by the international companies Sony and Sumsung allowing to reveal features in the organization of intra firm interaction of structural divisions, management of the companies and also in creation of portfolios of alliances is studied. The analysis of various configurations of networks, their advantages and shortcomings is carried out, the factors having impact on success of network interaction of subjects of innovative business, their competitive advantages are established. It is shown that the Russian business still has no understanding of importance of change of organizational forms of both intra firm, and intercompany interaction, wide use of the experience of creation of interindustry and international networks which is saved up by the foreign companies on the basis of strategic partnership and alliances.