If you are investing in, establishing or acquiring a business in the United States, the E-2 Treaty Investor visa may allow you to live and work in the US to develop and direct that business.
For UK investors, however, putting money into an American company does not automatically create an E-2 visa route.
The ownership of the business, your nationality, how much capital has genuinely been committed, the nature of the US enterprise and the role you will have once you are in the United States all matter.
For that reason, the immigration position is worth testing before the investment or acquisition structure becomes difficult to change.