Complex sentence: The start-up was founded by Mark Lamb and Amadeo Pellicce; one of its team members is James McCarthy (aka Nefario) who was previously involved in Global Bitcoin Stock Exchange, which controversially shut down in October 2012.
Split into simpler sentences: The start-up was founded by Mark Lamb and Amadeo Pellicce. One of its team members was James McCarthy (aka Nefario) who was previously involved in Global Bitcoin Stock Exchange, which controversially shut down in October 2012.