Motley Fool | Why Jacobs Engineering Group's Shares Plunged 15% Today Motley Fool Shares of Jacobs Engineering Group Inc (NYSE:JEC) plunged as much as 15.2% in trading Tuesday after the company reported fiscal fourth-quarter results that didn't sit well with investors. Shares recovered some of those losses late in trading but were ... Jacobs Engineering tops estimates More on Jacobs Engineering's FQ4 Jacobs Engineering (JEC) Beats Q4 Earnings Estimates |