[R] free float of swiss shares (streubesitzanteil)

[draht zieher]

dear list,
i'd like to do some calculation for which i need the free float
(german :streubesitzanteil) of a number of swiss firms' shares. but at
swx.com i did only find very few information. does anyone know, if and
where that information is available? best would be a website where
it's extractable via regexp.
thanks in advance!

josuah