"A company is a legal entity separate and distinct from its shareholders. It has its own assets and liabilities and its own creditors. The company's property belongs to the company and not to its shareholders. If the company has a cause of action, this is a legal chose in action which represents part of its assets. Accordingly, where a company suffers loss as a result of an actionable wrong done to it, the cause of action is vested in the company and the company alone can sue. No action lies at the suit of a shareholder suing as such, though exceptionally he may be permitted to bring a derivative action in right of the company and recover damages on its behalf ... Correspondingly, of course, a company's shares are the property of the shareholder and not of the company, and if he suffers loss as a result of an actionable wrong done to him, then prima facie he alone can sue and the company cannot. On the other hand, although a share is an identifiable piece of property which belongs to the shareholder and has an ascertainable value, it also represents a proportionate part of the company's net assets and if these are depleted the diminution in its assets will be reflected in the diminution in the value of the shares. The correspondence may not be exact, especially in the case of a company whose shares are publicly traded, since their value depends on market sentiment. But in the case of a small private company like this company, the correspondence is exact.
This causes no difficulty where the company has a cause of action and the shareholder has none; or where the shareholder has a cause of action and the company has none ... Where the company suffers loss as a result of a wrong to the shareholder but has no cause of action in respect of its loss, the shareholder can sue and recover damages for his own loss, whether of a capital or income nature, measured by the diminution in the value of his shareholding. He must, of course, show that he has an independent cause of action of his own and that he has suffered personal loss caused by the defendant's actionable wrong. Since the company itself has no cause of action in respect of its loss, its assets are not depleted by the recovery of damages by the shareholder.
The position is, however, different where the company suffers loss caused by the breach of a duty owed both to the company and to the shareholder. In such a case the shareholder's loss, in so far as this is measured by the diminution in value of his shareholding or the loss of dividends, merely reflects the loss suffered by the company in respect of which the company has its own cause of action. If the shareholder is allowed to recover in respect of such loss, then either there will be double recovery at the expense of the defendant or the shareholder will recover at the expense of the company and its creditors and other shareholders. Neither course can be permitted. This is a matter of principle; there is no discretion involved. Justice to the defendant requires the exclusion of one claim or the other; protection of the interests of the company's creditors requires that it is the company which is allowed to recover to the exclusion of the shareholder. These principles have been established in a number of cases, although they have not always been faithfully observed."