The content and features of the integration strategy in the system of strategic planning of the joint stock company are determined. The sequence of formation and implementation of the integration strategy of the joint-stock company is substantiated. Strategic alternatives for ensuring sustainable development of the joint-stock company are systematized. It is proposed to use the genetic algorithm method to solve the problem of choosing corporate integration association in order to optimize a certain set of clear corporate integration association parameters necessary for the implementation of an effective integration process. The method for calculating the synergistic effect is proposed, which is advisable to use immediately after the integration and the beginning of the operational activity of the corporate integration association, since it can be adjusted depending on the type of the corporate integration association being formed and the motives for its formation.