Information on Wikipedia would seem to indicate that neither Roussel-Uclaf, Hoechst, or Sanofi are any longer connected with the manufacture of RU-486.
Yes, and Bayer no longer makes Zyklon-B or Mustard Gas, either, but the way the poster wrote his thread he was attempting to indict companies, some of whom continue to be in existence to this day as themselves or as renamed entities, who developed chemical technologies for other purposes which were subsequently mis-used, as though they have some additional shame to shoulder in this era.
It is an example of completely irresponsible and misapplied extrapolation of guilt by association.
FReegards!