Here is the list.
Those joining the unicorn herd in December are:
Global Switch UK
Careen Networks UAE
Procore Technologies USA
Companies which are predicted by CB Insights to join the herd this year are here
As fabled beasts these unicorns can disappear in an instant as London-based Powa Technologies did – ‘worth’ $2.6 billion in June 2014 and in bankruptcy proceedings in February 2016.