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Yes and no, there is a difference. Even in common parlance, a stakeholder is anyone who has a stake in the outcome of an enterprise, it is a broader category than shareholder although in stakeholder capitalism such stakeholding is intended to be formalized by making stakeholders into shareholders by default, through the act of engaging with the enterprise.

In traditional capitalism, the shareholder is usually only the person who exchanges capital for shares (while only sometimes providing shares to employees, and usually even then only executives). In stakeholder capitalism, the act of participation in an enterprise automatically confers shares, so that participants become shareholders by default. For example being an employee may automatically confer shares, being a customer or supplier may automatically confer shares etc.