@Garrett **********
"Ownership of a Thai company has no bearing on your visa. You CAN do work for your company, not just be a silent partner, WITHOUT a needing a work permit."
Maybe True for a BOI.
I am the Managing Director of a Thai Company with about 48% Share. I prefer the One Year Multi-Entry B Visa rather than an Extension of Stay. When I go to Penang to get a new One Year Multi-Entry B Visa I have to prove that I have eight months remaining on my Work Permit or I cannot apply for the B Visa.
Several years ago when I had a B Visa One Year Extension of Stay I had to show my WP and have eight months left on the WP.
So for a regular Thai company structure I have been required every year to prove possession of a WP with 8 months left or I am denied the Visa or Extension.