Riot Blockchain, Inc. focuses on building, supporting, and operating blockchain technologies, primarily through its cryptocurrency mining operations and other developed businesses, as well as joint ventures, acquisitions, and targeted investments in the sector. Its primary focus is on Bitcoin and general blockchain technology. The company leverages its expertise and network to build and support blockchain technology companies. It builds a cryptocurrency mining operation and operates specialized computers that generate cryptocurrency, primarily Bitcoin. The company also holds interests in various activities, including purchasing and selling cryptocurrencies; providing accounting, audit, and verification services for blockchain based assets, such as cryptocurrencies; and developing TessPay, a payments ecosystem for component and sub-component supply chain settlements, and other blockchain solutions for telecommunications companies. As of March 31, 2018, approximately 3,500 of the miners were installed and operating. The company was formerly known as Bioptix, Inc. and changed its name to Riot Blockchain, Inc. in October 2017. Riot Blockchain, Inc. was founded in 2000 and is based in Castle Rock, Colorado.