Mergers and Acquisitions are among those operations able to launch a career of a manager or make it fall into the deepest chasm. Despite the mere meaning in the eyes of managers, the outcome in terms of value creation of these operations is tied to a lot of different endogenous and exogenous factors like country, the market where the firms are operating and more in general, by the performances of worldwide economic conditions. Going through the subject matter is then discussed the tender offer and, the other two most common ways the buyer negotiates with the seller, Negotiation one-to-one and auction.