X0101 EFFECT 33 LIVE 2015-06-19 16:00:00

S-4

0000892986 WARREN RESOURCES INC 333-204860 0001644528 Warren Marcellus LLC 333-204860-03 0001644527 Warren E&P, Inc. 333-204860-02 0001345757 Warren Resources of California Inc 333-204860-01