Block, Inc., founded by Jack Dorsey, the co-founder and ex-CEO of Twitter, is a financial technology company with a deepening full-stack connection to the Bitcoin industry through its subsidiaries. Its companies span payments apps and merchant tooling with Bitcoin integration, the development of bitcoin mining hardware, open source software development, a decentralized finance protocol for peer-to-peer markets and even a self-custody hardware wallet. 

Formerly called Square and founded in 2009, the company started integrating Bitcoin into its technology offering as early as 2014 via Cash App — its most famous subsidiary — allowing merchants to accept bitcoin payments through the…

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