Mergent Intellect (via Laramie County Library)
We use this database as a secondary resource.  The data seems to include many more closed companies than AtoZ or Reference USA, but it does have Canadian and International Companies listed.

NORTH AMERICAN DATABASE

Over 70 million US private businesses

Over 3.5 million Canadian private businesses

Over 6500 US public companies

Complete North American family tree details

Over 12 million home base businesses

 

INDUSTRY DATABASE

Access to over 900 industry segments via First Research

 

GLOBAL DATABASE

Over 245 million global private businesses

Global corporate family tree details

 

Sample US File

Sample International File