Diversification is a strategy adopted by many enterprises in the process of expansion. The success of the diversification of an enterprise mainly depends on the choice and implement of strategy; choosing an organizational structure that fits the type of diversification strategy used is fundamental to improving financial performance. Based on the empirical research method, this study establishes a symmetric model of diversification strategy and organizational structure on financial performance and selects data from 613 A-share-listed companies in China, from 2012 to 2016, to test the impacts of unrelated and related diversification strategies on financial performance, as well as the moderating effects of united company, holding company, and multidivisional structures on such relationships. The results show that there is asymmetry between the diversification strategy adopted and financial performance, and a related diversification strategy should be adopted as a priority; the symmetry of an unrelated diversification strategy and holding company structure on financial performance is partially confirmed, and other elements should be adopted, simultaneously, to improve this symmetry; a related diversification strategy and multidivisional structure on financial performance is symmetric. The above findings will provide references for the diversification strategy choice and the organizational structure design of enterprises.

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