Petro River Oil Corp. (OTCPK:PTRC) acquired an additional 5.63% stake in North Sea UK Project on February 27, 2019. Petro River Oil already holds an indirect 5.63% interest in the North Sea UK Project through its investment in Horizon Energy Partners, LLC. Petro River Oil Corp. (OTCPK:PTRC) completed the acquisition of an additional 5.63% stake in North Sea UK Project on February 27, 2019.