Is there a minimum amount of shares somebody can have?

XXX Investments (foreign investor) will have the majority of the shares (probably the maximum of 99%). YYY (Ethiopian company/branch) will serve as the ‘straw man’ (1% of the shares or less).  Is 99% the maximum amount of shares XXX Investments can have? Or could it e.g. be 99,9%?
Thanks,
 
Becx