Industry information you'll find here:
The NAICS industry classification system: you need to know about this because many publishers use it to organize their data and content!
Business Insights Essentials: a handy database for determining the NAICS code for a specific company.
Industry ratios: the big source is RMA e-Statement Studies.
Industry profiles: IBISWorld is the place to start, but there are other sources. These can provide context for your company.
Of course, often you're trying to identify the code(s) for a specific company. In that case, use a company directory database. Here are two that make it easy to see the codes.
Business Insights Essentials offers company profiles that make it fairly easy to find out what is the primary NAICS code.
Primary industry codes: Designate the line of business (industry) from which the company derives the largest proportion of its income.
Secondary industry codes: Designate any other lines of business from which the company derives income.
On the right-hand side you will see the Industries and the NAICS codes relevant to the company. In the screenshot above, I've enlarged this section, and given it a green border. Click here to see the actual GE company profile.
Notice that the industries and codes are NOT in numerical order! The first industry code (335999) is also shaded in beige -- this is the primary industry of the company.
The homepage of the database is shown at left:
– NAICS code
After searching, you'll get a description page such as the one shown below.
Click on Financial Discussion.
Below is a screenshot showing what you need to download! The arrows point to:
Below is a screenshot showing IBISWorld's interface.
Search in it using ...
– NAICS codes
– Or browse the hierarchical display of NAICS codes (click on "Industry Research in the upper menu)
NOTE: You can also search by company name, but that is less reliable. It only works IF the company represents a major player in the industry!
Look for the Industry reports (indicated below with an arrow).
Once in the report, you can download the PDF or view it online.