The least profitable was Distribution Services, with a profit margin of 1.84%, followed by Retail Trade, with a net profit margin of 3.50%. It looks like Energy Minerals will take the biggest leap percentagewise, moving from 0.25% in 2015 to 3.87% in 2016. Electronic Technologies, Producer Manufacturing and Retail Trade will all be flat in 2016 against this year. Transportation is the only industry FactSet is predicting will have a reduced profit margin in 2016. The sector will drop 5.5% from 10.05% in 2015 to 9.45% in 2016. The chart below shows the top 10 sub-industries within the sectors. Top 10 Most Profitable Industries Chart Source: FactSet/Forbes Click here to see all sectors ranked by profit margin in chart form .