Mergers and acquisitions, or M&A, is a general term for when two companies join together. Though often used as a single phrase, mergers and acquisitions are slightly different. An acquisition is when one company buys another outright. A merger is when two companies, often of similar size, combine to form a new, single entity.

In practice, most M&A deals are acquisitions, even if they're called mergers for the sake of public relations. It's rare for two companies to be true equals. Usually, one company's management and shareholders end up with more control over the new, combined business.

M&A transactions can be categorized based on the relationship between the two companies involved:

• Horizontal: The two companies are in the same industry and are direct competitors. Think of one airline buying another.
• Vertical: The deal involves two companies at different stages of the same supply chain. For example, a car manufacturer might buy a tire company.
• Conglomerate: The companies are in completely unrelated industries. Imagine a software company buying a chain of coffee shops.

Why do companies go through the complex and expensive process of M&A? The core reason is to create value that couldn't be achieved alone. This value creation comes in several forms.

One major driver is achieving synergies. This is the idea that the combined company will be worth more than the sum of its parts. Synergies can come from cutting redundant costs, like having only one accounting department instead of two. They can also come from boosting revenue, such as by selling one company's products to the other's customer base.

Private equity (PE) firms are investment funds that buy and manage companies on behalf of institutional and high-net-worth investors. Unlike a regular corporation that might buy another company to expand its own operations, a PE firm's business model is M&A.

PE firms raise capital from investors (Limited Partners or LPs) and use it to acquire companies. The firm (as the General Partner or GP) then works to increase the value of these portfolio companies over a period of several years. Finally, they sell, or "exit," the investment, hopefully for a significant profit. The goal is to generate strong returns for their investors.

For these firms, M&A isn't just an occasional strategic move; it is the central activity through which they deploy capital and generate returns. They are specialists in buying, transforming, and selling businesses.

While both PE firms and corporations engage in M&A, their motivations and methods differ significantly. Understanding these differences is key.

Essentially, a corporation buys a company to keep it and make its own business stronger. A private equity firm buys a company to sell it later at a higher price. This fundamental difference in objective shapes every aspect of the deal, from financing to management.

This foundation gives you a clear picture of what M&A is and the unique role private equity plays in this field. Next, we will explore the M&A process in more detail.