The management and controlling of investments represent central problem areas in both business practice and academic discussion. Today, not only capital market-oriented companies but also numerous medium-sized enterprises exhibit decentralized structures and a strong trend towards conglomeration, making the management of investments an increasingly significant leadership challenge. This case study book follows the lifecycle of investments: from acquisition to integration and ongoing management, all the way to controlling and exit. The individual phases in the life of an investment require tools that go beyond the toolbox of classical management. Therefore, instruments are developed that are specific to the management of investments, going beyond the conceptual framework of the original textbook.