X0101 EFFECT 33 LIVE 2011-11-22 0001193125-11-280154 POS AM 0001465872 OFFSHORE GROUP INVESTMENT Ltd 333-174851 0001465873 SAPPHIRE DRILLER Co 333-174851-16 0001465876 EMERALD DRILLER Co 333-174851-15 0001504851 MANDARIN DRILLING Corp 333-174851-14 0001522823 P2020 RIG CO. 333-174851-13 0001504852 P2021 RIG CO. 333-174851-12 0001522817 VANTAGE HOLDINGS MALAYSIA I CO. 333-174851-11 0001465862 VANTAGE INTERNATIONAL MANAGEMENT CO. 333-174851-10 0001465871 VANTAGE DRILLER I CO. 333-174851-09 0001465865 VANTAGE DRILLER II CO. 333-174851-08 0001465866 VANTAGE DRILLER III CO. 333-174851-07 0001465867 VANTAGE DRILLER IV CO. 333-174851-06 0001419428 Vantage Drilling CO 333-174851-05 0001522821 VANTAGE DRILLING LABUAN I LTD. 333-174851-04 0001522853 VANTAGE DRILLING (MALAYSIA) I SDN. BHD. 333-174851-03 0001465863 VANTAGE DRILLING NETHERLANDS B.V. 333-174851-02 0001465864 VANTAGE HOLDING HUNGARY KFT 333-174851-01