If you cannot find a company by doing a SIC lookup using the SEC database or the company has only filed Form D with the SEC, it's unlikely the company SIC code is known.

Real-World Examples of SIC Codes . Apple Inc.'s SEC filings show its SIC code as 3571 (electronic computers). The first two digits—35—identify its major industry group as "Industrial and ...

The NAICS Code represents the North American Industry Classification System. In other words, the NAICS Code places a business within its industry by assigning to it a six-digit code that indicates ...