Owned? Just one.
However, company and rental cars... wow, let's see.
Ford Focus 2003 1.6 (current)
Renault Scenic 1.5 TD (x2, first one broke)
Vauxhall Meriva 1.6 (horrible, horrible car)
Fiat Stilo 1.4 (6-speed gearbox, WTF?)
Ford Mondeo 1.8 (lovely car)
Toyota Avensis 1.8 (horrible)
Ford Focus estate 1.6 (wagon, I guess you call it)
Nissan Micra 1.0 (hmm)
Ford Escort 1.8 TD (slow as hell but an okay car)
Citroen C3 1.4 (nice)
Skoda Octavia 2.0 estate (quick, fun)