As of March 31, 2019, MGT owned and or managed approximately 5,700 mining machines. Approximately 2,500 machines are located in Colorado and 3,200 machines are located in Ohio. Of the 5,700 machines, 3,700 are owned by the Company, and the remaining machines are investor owned. All miners owned or managed by MGT are S9 Antminers sold by Bitmain Technologies LTD. In addition to the S9 Antminers, the Company owns 50 custom designed GPU-based Ethereum mining rigs. Because the price of Bitcoin steadily decreased during 2018 and throughout the first quarter of 2019, the Company decided it was not economically responsible to commence mining operations in Colorado or Ohio. On May 14, 2019, the Company announced commencement of operations in both Colorado and Ohio. During the year ended December 31, 2018, we mined 245 Bitcoin for total revenue of $2,010,000. In addition, the miners we operate pursuant to the management agreements mined 184 Bitcoin during the same period.
As of June 17, 2019 , there were 234,178,082 shares of our common stock outstanding