The expansion of firms is a subject of high interest for both management research and business life. Managers often name expansion as a central goal for their firms in order to increase firm value. Fabian Günther addresses growth within and across industries and analyzes whether differences in the growth process impact further development as well as financial success. The author identifies the capacity and capabilities of a firm's management both as an accelerator of as well as a restriction for the growth process and its outcomes. On this basis, challenges of the growth process from a complexity perspective are discussed. Specifically, the author deals with status and process complexity as well as the amount and the volatility of complexity over time and empirically tests their impact on further firm development and performance.