A report by the Investment Company Institute found that over two-thirds of mutual fund owners bought their funds through an employer-sponsored retirement plan, and 43 percent purchased funds with the help of a financial advisor. About 64 percent have over half their savings invested in mutual funds and 40 percent have at least 75 percent of their assets in mutual funds. Eighty-three percent of fund owners own more than one, and equity funds are the most popular, with 80 percent of owners choosing to invest in equity funds.

Read more at Investment Company Institute.