Byron Energy Limited is an Australia-based company engaged in oil and gas exploration in the shallow waters and transition zone (offshore Louisiana) in the Gulf of Mexico, the United States. The Company is the operator and working interest holder of several blocks in the Gulf of Mexico prospective for oil and gas. Its blocks are located in the shallow waters of the Outer Continental Shelf of the Gulf of Mexico, offshore Louisiana. The Company's portfolio of properties consists of South Marsh Island, which includes Block 70 and Block 71; Eugene Island, which includes Block 18, Block 63 and Block 76; Grand Isle, which includes Block 95, and Transition Zone (Offshore Louisiana), which includes Bivouac Peak Leases. The Company's subsidiaries include Byron Energy (Australia) Pty Ltd, Byron Energy Inc. and Byron Energy LLC.