There are six types of Mergers & Acquisitions:
Horizontal M&A - Brings together similar products and reduce competition in an industry.
Vertical M&A - Two separate companies with different services or products share the same supply chain and extend their business capabilities.
Market Extension - Two businesses that produce the same products in different markets join together.
Product Extension - Two businesses that create related products in the same industry merge to sell their products together and gain access to more customers, ultimately increasing profits.
Conglomerate M&A - Two businesses that are in totally unrelated markets join together.
Concentric M&A - Two companies in the same industry combine to offer a more extensive range of services and products.