Sanders said his campaign is working on a plan to require large businesses to regularly contribute a portion of their stocks to a fund controlled by employees, which would pay out a regular dividend to the workers. Some models of this fund increase employees’ ownership stake in the company, making the workers a powerful voting shareholder. The idea is in its formative stages and a spokesman did not share further details.

Sanders also said he will introduce a plan to force corporations to give workers a share of the seats on their boards of directors.