As always, your professor is the authority - and approves your choice of topic. This is just some advice to help this project go more smoothly:
The resources below provide information on international 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.
NAICS was adopted in1 997; prior to that, businesses were classified by SIC Code. For historical research, it may be necessary to make conversions between the systems: