Jennifer Rumsey, Chair and CEO of Cummins Inc . (NYSE:CMI), a prominent player in the machinery industry with a market cap of $48.6 billion, recently sold a portion of her holdings in the company.

This was the stock's second consecutive day of gains.

Cummins Inc. (NYSE: CMI) and Liberty Energy Inc. (NYSE: LBRT) (“Liberty”) today announced that the industry’s first natural ...