The capital stock of such corporation may consist of common stock and 1 or more classes of preferred stock. Capital stock is the number of common and preferred shares that a company is authorized to issue, and is recorded in shareholders' equity.No co-operative bank or savings bank shall convert to a capital stock form of organization without written approval of the commissioner. Assessable capital stock is capital stock that could subject shareholders to liabilities above what they paid for their shares. Note: State capital stock taxes (often referred to as state franchise taxes) are levied on net assets of a company or its market capitalization.