Or maybe he has just noticed Raytheon are in Scotland and might have to move south in case of independence.
Raytheon HQ is in the USA; Raytheon UK HQ is in London; the military divisions are scattered around Farnborough, Portsmouth, Waddington and other points south. Glenrothes specialises in high Temperature silicon carbide chips and other civil integrated electronics components - a world leader but not a market where independence would instantly force the American HQ to relocate it south - frankly I doubt the staff would move.
Better off looking at companies like Marconi whose Avionics Radar and Countermeasure Systems is based in Edinburgh and, amongst other things, is responsible for the Typhoon ECR90 radar.....