X0101 EFFECT 33 LIVE 2015-05-19 09:00:00

S-4

0001514732 SAExploration Holdings, Inc. 333-203752 0001640845 SAExploration Sub, Inc. 333-203752-04 0001640847 SAExploration, Inc. 333-203752-03 0001640900 SAExploration Seismic Services (US), LLC 333-203752-02 0001640902 NES, LLC 333-203752-01