Petro River Oil Corp. engages in the exploration and development of conventional oil and gas assets. The company is headquartered in New York City, New York. The company went IPO on 2005-03-28. The firm is focused on the exploration and development of conventional oil and gas assets. The firm's holdings are in the mid-continent region in Oklahoma; Kern County, California, and Larne Basin, Northern Ireland. The firm also holds indirect onshore and offshore acreage positions in Denmark and Dorset, the United Kingdom. The Company, through investment in Horizon Energy Partners, LLC (Horizon Energy), owns interest in Petroleum License PL 1/10 and P2123 (the Larne Licenses) located in the Larne Basin in Northern Ireland. The two Larne Licenses, one onshore and one offshore, together covered approximately 130,000 acres, as of April 30, 2016. The Denmark project is an underexplored oil basin with the oil and gas fields offshore in Norway and the United Kingdom. The Kern County field has produced over 100 million barrels of oil and natural gas equivalents.