I'm a British citizen who is based in London, UK. For the last few years I have been structuring trading systems for investment banks and financial firms, mainly a state-of-the-art web trading layers that works very well with various data providers like Realtick and Lightspeed, now my startup is embarking on maintaining a direct FIX connectivity framework with BATS and ARCA but need to have a broker-dealer registration established in the US Is there anyone who is willing to participate in a US based new venture, or can help in finding a reasonably priced equities trading broker dealer (preferably shell) for sale? Thank you.