Globalization and economies of scale to counter competition on the one hand, the development of international financial markets and widespread and steady growth in share prices in the stock markets of Western countries, on the other hand, have trained over 90s a wave mergers and acquisitions unprecedented in history. After a period of reduction of these transactions, in recent years there is again a significant increase in transactions of mergers and acquisitions internationally. Internationally, among the most dynamic sectors were the energy, medical and pharmaceutical and consumer goods sector. The last two years were very good for mergers and acquisitions activity globally, maintaining the interest rates at extremely low levels.