You can't just use your random family lawyer. You need one who specialises in corporate law, VCs, RSUs and so on. Who that will be depends entirely on your location. I know a company that does this in London, but that's no use at all to this poster.

For someone based in London, are you able to share?

I've used Bird & Bird in the past. Expensive though!

How about US/California?

Rimon Law is fantastic.

Thank You.

David at Grellas Shah would be my recommendation. They're a boutique-y startup-oriented law firm that understands these issues.

Your random family lawyer, if they are any good, will refer you to a specialist they know for something like this. That's a decent way to find one.

call the intake people at Grellas Shah and ask for David Siegel, or for a different partner as appropriate.

Contact the state bar.

They provide relevant referrals to the public.

It is part of how they justify their monopoly.