Cal. Bus. & Prof. Code § 25503.12

Notwithstanding any other provision of this division, a retail licensee may hold a diminutive amount of stock in a corporate licensed manufacturer, manufacturer’s agent, winegrower, rectifier, importer, or wholesaler, provided that the purpose of the stock ownership by the retail licensee, as determined by the department, is not to violate any of the provisions of this chapter, and provided further that the stock is listed on the New York Stock Exchange, the American Stock Exchange, or on NASDAQ, and the department is notified of the stock ownership.