17.

CONCENTRATIONS

During 2016, 19% of revenues were derived from one customer that individually had over 10% of our total revenues: DigiKey Electronics in the Power and Electromechanical segment. During 2015, 31% of revenues were derived from two customers that individually had over 10% of our total revenues. DigiKey Electronics was 20% of our consolidated revenue and National Grid in the Energy segment was 11% of our consolidated revenue in 2015. During 2014, 46% of revenues were derived from two customers that individually had over 10% of our total revenues. Digikey Electronics was 30% and National Grid was 16% of our consolidated revenue in 2014.

The Company’s major product lines in 2016, 2015 and 2014 were power and electromechanical products and natural gas infrastructure and high-tech solutions.

At December 31, 2016, of the gross trade accounts receivable totaling approximately $9.5 million, 30% was due from three customers in the Energy segment: Scotia Gas Networks plc, Socrate spa, and National Grid at 10% each. At December 31, 2015, of the gross trade accounts receivable totaling approximately $14.8 million, 11% was due from one customers in the Energy segment: National Grid.

There were no supplier concentrations greater than 10% in 2016 or 2015. During 2014, the Company had a supplier concentration of 11% from one vendor of inventory product in the Power and Electromechanical segment.

With the United Kingdom operations of Orbital, the Company also has foreign revenue and trade accounts receivable concentrations in the United Kingdom of 20% and 27%, respectively for the year ended and at December 31, 2016. In 2015, the Company had foreign revenue and trade accounts receivable in the United Kingdom of 25% and 28%, respectively. In 2014, the Company had foreign revenue and trade accounts receivable in the United Kingdom of 34% and 54%, respectively for the year ended and at December 31, 2014.