This will largely depend on the circumstances of the case but if the company was set up during the marriage, the starting point will be 50% of the value of the company/shareholding. This is true even if only one party works for the company, and this is their primary source of income. There will of course be arguments that can be run to suggest a departure from equality, but it is imperative for parties to appreciate what the starting point will be from the outset of proceedings to avoid disappointment down the line.