Adding new company

[Gueneri]

Hello to everyone,

I am new in modding and having amateur adventure nowadays. I've quiet figured out some topics like engine, transmissions etc. but now i want to create my own economy mod. As far as my research, I couldn't find any def file related with calling companies. I want to change regional companies to apply different base price for same products. To do so, i need to add companies (or duplicate some of them) however, as i mentioned before, there is no def file linking companies to a specific map region. Unfortunately, i have no idea about mapping. Is it integrated in the map files or am i missing smth?

Thanks for your help in advance,