Armour & Company begins in our story being owned by Greyhound Lines which is most notably known for its Coach / Bus services in the USA. However during 1977/1978 it was sold to Revlon (Source), yes, that company you might suspect have only ever made beauty products were actually in the business of Factor VIII.
Revlon had a good run with Armour and their main-stay Factor VIII product which was aptly named "Factorate". Revlon remained in control of Armour from 1978 to around 1986 (Shortly after Haemophiliacs began to become aware they were infected with HIV). In 1986 Revlon sold Armour to a company called Rorer Pharmaceutical for almost $700 Million. Rorer went on to merge with Rhône-Poulenc in 1990 (Source).
In 1996 Armour was merged with German company Behringwerke, the new alliance was named "Centeon". It was 3 years later in 1999 that the entity known as Centeon changed its name to Aventis Behring following a merger of the parent companies, Rorer and Hoechst AG, which merged to become known as Aventis.