Foster Group Inc., a fee-only advisory firm in West Des Moines, has been named to Wealth Management magazine's list of Top 100 Registered Investment Advisers for 2013. The list ranks the 100 largest registered investment adviser firms in the country, based on total assets under management. Foster Group, the only Iowa-based company on the 2013 list, was No. 78 on the list with $1.287 billion under management. Founded in 1989 by Jerry Foster, the firm serves more than 850 clients across 36 states. To be considered for the list, a firm must have at least 10 percent individual clients and at least 10 percent high-net-worth clients, and no more than 50 percent institutional clients. In addition, firms on the list cannot operate as a broker-dealer or a bank or have an affiliation with an investment company.