Corporations in the days of the Founders were a different animal from modern corporations. In those days a corporation was a legal monopoly over all commerce in a given geographical area that was granted by the King. The East India Company was a classic example.
Which explains why the tea tossed into Boston harbor belonged to the East India Company. US corporations of the time were nothing like England's. They were chartered by states for a specific time period and limited only to public works projects like canals and roads. Many of the founding generation saw the rise of private for-profit corporations as a threat to democracy, and they've been proven correct.