Trends emerging in recent years, such as divestitures, spin-offs and class action suits, make an understanding of valuation of companies with ongoing operations imperative, not only for investors, but also for managers and for a company's directors. The discounted cash flow method to valuation that is discussed in this note will be a guide, first, to business managers in their attempt to follow value maximizing strategies; second, to portfolio managers and security analysts in their effort to discover the true economic value of a company and its equity; and third, to investment bankers in their advisory role of companies involved in merger transactions and restructuring. This note will not demonstrate how to value companies in financial distress; in such cases, a contingent claims valuation will be more appropriate. The discounted cash flow valuation method is demonstrated through the valuation of a Canadian company using actual financial data.