X0101 EFFECT 33 LIVE 2012-08-01 15:30:00

S-4

0001465872 OFFSHORE GROUP INVESTMENT Ltd 333-181890 0001419428 Vantage Drilling CO 333-181890-21 0001465864 VANTAGE HOLDING HUNGARY KFT 333-181890-20 0001465863 VANTAGE DRILLING NETHERLANDS B.V. 333-181890-19 0001522823 P2020 RIG CO. 333-181890-18 0001504852 P2021 RIG CO. 333-181890-17 0001465876 EMERALD DRILLER Co 333-181890-16 0001465873 SAPPHIRE DRILLER Co 333-181890-15 0001465871 VANTAGE DRILLER I CO. 333-181890-13 0001465865 VANTAGE DRILLER II CO. 333-181890-12 0001522821 VANTAGE DRILLING LABUAN I LTD. 333-181890-11 0001522853 VANTAGE DRILLING (MALAYSIA) I SDN. BHD. 333-181890-10 0001522817 VANTAGE HOLDINGS MALAYSIA I CO. 333-181890-09 0001465862 VANTAGE INTERNATIONAL MANAGEMENT CO. 333-181890-08 0001465870 VANTAGE DEEPWATER Co 333-181890-07 0001550869 Vantage Deepwater Drilling, Inc. 333-181890-06 0001550868 Dragonquest Holdings Co 333-181890-05 0001551170 Vantage Holdings Cyprus ODC Ltd 333-181890-04 0001551627 Vantage Drilling Poland - Luxembourg Branch 333-181890-03 0001465866 VANTAGE DRILLER III CO. 333-181890-02 0001465867 VANTAGE DRILLER IV CO. 333-181890-01