Big E - Stelios and his family still own around 60% of the company.
clipstone - EZY Switzerland is, I believe, majority owned by Swiss interests and acts as a 'franchisee'.
The rules are very simple, and you can get hold of a copy from the CAA's Economic Regulation Group if you want. They boil down to the following:
1) If you want to operate intra EU only, the company must be majority owned and controlled by EU nationals. Brits, Greeks, Belgians, French - it doesn't matter.
2) If you want to operate from any EU country to a point outside the EU, then the company must be majority owned and controlled by nationals of that country. This is one of the issues that's holding up GSS - who actually controls it. John Porter and his minions, which would be fine - or Atlas Air, which isn't?
Those rules will change as the EU takes over the sovereign rights on bilaterals. Incidentally, OM is ultimately owned by Globus, which is a Swiss company.