Can company A find out what web Internet Tracking at Work when I am using internet via VPN to another company ?

I work in company A and they have strict rules on internet usage during work hours. I am a contractor and I have VPN connection to my company B. If i connect to B's VPN and browse internet, will the company A find out about what sites I am browsing and how much bandwidth I am using?|||If the VPN starts at your machine then they can tell what your doing by looking at your machine but once your traffic enters the tunnel it becomes encrypted and virtually impossible to decypher.