X0101 EFFECT 33 LIVE 2017-01-18 12:00:00

S-3

0001471261 Cobalt International Energy, Inc. 333-215280 0001692609 Cobalt International Energy GP, LLC 333-215280-05 0001470808 Cobalt International Energy, L.P. 333-215280-04 0001692599 Cobalt GOM #2 LLC 333-215280-03 0001692597 Cobalt GOM #1 LLC 333-215280-02 0001692607 Cobalt GOM LLC 333-215280-01