Companies which use Python

As their primary language

Cloud9ers
eSpace used it in the 2012 Egyptian constitution website. It's still in use till now.
Codescalers
Bkam? A large part of Bkam infrastructure is written in python
FLying elephant lab - yaoota.com
EGYNCY

Some of the projects, or for scripting

Link Development
Silverkey
App Fruits Not sure about this one
TE Data
zlabs - Used for scripting and automation