Are sole proprietorships permitted to own stock in other companies and are they competent to realize wherewithal gain?
Answers:
you would own the stock as an individual , not a proprietor. A proprietorship is not a separate entity resembling a corporation or partnership, and can't own stock. You would claim the wealth gain or losses on your 1040. Income on your calendar C would cost you more because you'd enjoy to income FICA taxes on it - you don't repay those on funds gain as an individual investor so it make no sense to try and do what you are asking
Sure, you a short time ago track and report on your individual personal taxes. That's what a sole prop is = simply you.
Yes, they are.