Inside Low-Cost Fund Firm Vanguard's 401(k)

Low-cost fund firm Vanguard rates in the top three plans based on fees, with fees of just 0.385% of assets. No surprise there. Of course, the top holdings in the plan are also Vanguard's own funds. Which ones get the pick? Vanguard's 500 Index, Primecap, and Windsor funds.

Data: BrightScope