This tool should provide the ratios you need: Mergent.
Mergent allows you to create a specific list of competitors and generate a report comparing them.
These library databases and open websites will have articles, profiles and analysis of your companies.
The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy. It is important to know the NAICS codes associated with your business because you will use them while searching for resources.
Identifying NAICS (Industry) Codes. From the University of North Carolina Greensboro business librarian. Run time: 5:18.