Sirius Minerals Plc is a United Kingdom-based fertilizer development company. The Company is primarily focused on the development of polyhalite deposit, The York Potash Project. The Company operates through two divisions: the UK segment, which consists of the York Potash related activities and the corporate operations, and the Rest of World, which includes the Company's other overseas interests. The York Potash Project is based in North Yorkshire, within the United Kingdom, and is the Company's sole development asset focus. The Project's area of interest comprises approximately 796 square kilometers (around 271 square kilometers onshore and around 535 square kilometers offshore) within North Yorkshire, between Scarborough and Whitby, extending approximately 16.5 kilometers inland west from the coast and up to 14 kilometers offshore. The Company's subsidiaries include York Potash Holdings Limited, Sirius Minerals Holdings Limited and Sirius Minerals (Australia) Pty Limited.