This document provides an overview of the principles of valuation for mergers and acquisitions. It discusses key terms like mergers, acquisitions, and types of M&A deals. It also outlines common motives for M&A like strategic gains, financial benefits, and managerial motives. The mechanics of an M&A deal including antitrust laws and accounting treatment are summarized. The document uses the AOL-Time Warner merger as a case study, outlining the motives and valuation of the two companies at the time of the announced deal.