What Is a Merger?
A merger is a transaction in which two companies combine to form one, with the shareholders of both firms typically ending up owning stock in the combined entity. Legally, one company usually survives and absorbs the other, even when the deal is presented publicly as a partnership between equals.
Classic examples include the large oil, pharmaceutical, and media combinations of the past few decades, where two industry giants joined to gain scale. In a so-called merger of equals, the ownership split might be close to 50/50 and leadership roles are shared between the two management teams.
How Mergers Are Structured
Most mergers are stock-for-stock transactions, meaning shareholders of one company receive shares of the other at a negotiated exchange ratio rather than cash. For example, if Company A agrees to exchange 1.5 of its shares for each share of Company B, and Company A trades at $40, each Company B share is effectively valued at $60.
The exchange ratio determines how much of the combined company each shareholder group owns, which makes it one of the most heavily negotiated terms in the deal. Bankers run contribution analyses comparing each company's revenue, EBITDA, and earnings to what its shareholders receive.
Merger vs. Acquisition
The practical difference between a merger and an acquisition is mostly about framing and control. In an acquisition, a buyer clearly purchases a target, usually for cash or a mix of cash and stock, and the target's identity often disappears into the acquirer.
In a merger, the transaction is positioned as a combination, often with a new name or shared branding, and target shareholders roll their ownership into the new company. Calling a deal a merger can also make it easier for the target's board and employees to accept, even when one side is economically the buyer.
Why Mergers Matter in Banking
Bankers advising on mergers build merger models that combine both companies' financials, layer in synergies, and test whether the deal is accretive or dilutive to earnings per share. They also help negotiate the exchange ratio, governance terms, and social issues like which CEO leads the combined company.
In interviews, expect questions on why a company would merge rather than acquire, how exchange ratios work, and how to analyze a stock-for-stock deal's impact on EPS.
