X0101 EFFECT 33 LIVE 2010-01-25 10:00:00

S-4

0001131227 HORNBECK OFFSHORE SERVICES INC /LA 333-162197 0001159509 HORNBECK OFFSHORE SERVICES LLC 333-162197-06 0001159332 HORNBECK OFFSHORE OPERATORS, LLC 333-162197-05 0001311888 Hornbeck Offshore Transportation, LLC 333-162197-04 0001311889 Hornbeck Offshore Trinidad & Tobago, LLC 333-162197-03 0001311887 HOS-IV, LLC 333-162197-02 0001163750 ENERGY SERVICES PUERTO RICO LLC 333-162197-01