Moreover, it can be observed that many firms are part of a group that operates in other ports and other regions as well (percentage-wise they are 46 per cent in terms of number and 88 per cent in terms of revenue). Thirty-seven per cent of the firms have more than one branch. Ninety per cent of the firms have their registered office in the FVG, but some have their registered office abroad. The conclusion that the FVG port system is a very open economic system is confirmed when one looks at where the input suppliers and the clients are located. The FVG port system buys 50 per cent of its inputs abroad, 42 per cent in OIRs and only 8 per cent in FVG. It sells 29 per cent of its services within the FVG region, 36 per cent in OIRs and 34 per cent abroad.