X0101 EFFECT 33 LIVE 2010-09-07 0000932471-10-002920 485APOS 0000891190 VANGUARD ADMIRAL FUNDS 033-49023 S000030012 Vanguard S&P 500 Growth Index Fund C000092034 ETF Shares S000030012 Vanguard S&P 500 Growth Index Fund C000092035 Institutional Shares S000030013 Vanguard S&P 500 Value Index Fund C000092036 ETF Shares S000030013 Vanguard S&P 500 Value Index Fund C000092037 Institutional Shares S000030014 Vanguard S&P Mid-Cap 400 Index Fund C000092038 ETF Shares S000030014 Vanguard S&P Mid-Cap 400 Index Fund C000092039 Institutional Shares S000030015 Vanguard S&P Mid-Cap 400 Value Index Fund C000092040 ETF Shares S000030015 Vanguard S&P Mid-Cap 400 Value Index Fund C000092041 Institutional Shares S000030016 Vanguard S&P Mid-Cap 400 Growth Index Fund C000092042 Institutional Shares S000030016 Vanguard S&P Mid-Cap 400 Growth Index Fund C000092043 ETF Shares S000030017 Vanguard S&P Small-Cap 600 Index Fund C000092044 ETF Shares S000030017 Vanguard S&P Small-Cap 600 Index Fund C000092045 Institutional Shares S000030018 Vanguard S&P Small-Cap 600 Growth Index Fund C000092046 ETF Shares S000030018 Vanguard S&P Small-Cap 600 Growth Index Fund C000092047 Institutional Shares S000030019 Vanguard S&P Small-Cap 600 Value Index Fund C000092048 ETF Shares S000030019 Vanguard S&P Small-Cap 600 Value Index Fund C000092049 Institutional Shares