why only 49.9% ? (50.1% shares belong to the belgian state).
this way, the EC (European Community) consider Sabena still a belgian (owned) company - with all the advantages of beeing IN the EC. These advantages would get lost if Swissair had the majority (Switzerland not being in the EC).
And as it is, Swissair can play Duett on this political-piano (as SR non EC - as daughter Sabena in the EC).