1. Is it possible to join a US startup or company and become an employee of it, if you stay overseas and you are not physically in the US?

2. How do you receive equity as remuneration from a US startup and register your ownership of the equity if you do not have H1B and:

2a. if you are an employee of US startup but working from overseas

2b. if you are employed by a US company that gave a visa but also do contractor stuff for a US startup as a side thing

3. Is there a way to start and incorporate a new US company under your name as a main shareholder, if you are currently employed on H1B or H1B1 by an existing company?

3b. Or do you have to start and incorporate a new US company under some other structure?