To maximize their effectiveness, color cases should be printed in color. Most large companies operate in more than one business. Valuing a diversified company requires separate valuations for each of its businesses and for the corporate headquarters. This method of valuing a company by parts and then adding them up is known as Sum-Of-The-Parts (SOTP) valuation and is commonly used in practice by stock market analysts and companies themselves. However, it is rarely taught in MBA programs or broached in valuation textbooks. Yet the application of the method raises a number of challenges.