Economic groups are a very important corporate structure in Chile, and, like any organization, they are faced with a variety of strategic decisions, including growth strategies (portfolio composition). Therefore, this article provides an in-depth discussion of these strategies, especially strategies of concentration and diversification. This study was conducted on the basis of information about all economic groups registered with the Chilean Superintendence of Securities and Insurance. A sample of 42 groups was obtained by using simple random sampling. One of the main findings was that most economic groups adopt concentration strategies in an industry where there is an active replacement of economic groups.