Dimensional Fund Advisors (DFA)
I have been working with DFA for about 20 years. It is one of the largest mutual fund companies, but you probably never heard of it. That is because DFA does virtually zero advertising as it is sold only by approved fee-based advisors, not stockbrokers or insurance agents.
There is so much to say about DFA that it's hard to say it concisely; however, let me quote a paragraph from a recent Morningstar publication:
"Dimensional Fund Advisors has forged a strong and distinctive culture that has served investors well. The firm's low cost structure and disciplined approach to investing, launching new strategies, and qualifying the financial advisors who use its funds helps set it apart. It reflects a consistent, industry leading focus on fund holders and thus we are raising its corporate culture to an A."
DFA’s public website is www.us.dimensional.com