The company can play a major role in the industrial era like constructing infrastructure, manufacturing, military, financing, trading, electric grid, espionage and communication.

The  company is of the following types:

State-owned: These companies are owned by civ.

Private: These companies are owned by an individual.

These company roles are discussed below:

Infrastructure Construction: Instead of having builder units the civ will launch a tender or instantly award to its state-owned company or to another civ s state-owned company. Every turn civ has to give some money or can give the required money at the starting of the project. If civ unable to give money project will stop or can deal with the company to lease it for some turns. 

If the infrastructure is given for lease the civ will not get bonuses like money from it till the lease ends.

Manufacturing: For this civ will have to build an industrial park or district. The industrial park or district will have the capacity and the company will set their manufacturing plants. 

The manufacturing plants give  bonus and are of the following type:

Fertilizer plant: If this plant is established cause an increase in food production and money.

Car manufacturing plant: These plants give money and stability.

Military equipment Manufacturing: These plants increase the production of military units.

Industrial Machinery Manufacturing: These plants increase the production output of the city.

Military: These companies will have private military and civs can hire support from them in war or ensuring the safety of sea trade routes from hostile civs or pirates.

Electric Grid: These companies will make the electric grid from the power plant to the city or city to a city or city to a foreign city. The grid will only go to designated foreign civ if the treaty of power-sharing is signed. When a treaty is signed then both civ will assign company. This is beneficial for civ to trade power and get money.

Financial: These companies need a business district. These companies give high money bonuses to civ. The companies which are state-owned can grant the loan to civ with the money problem. If civ is unable to repay the loan it rating will decrease and no other company cannot give loans.

Trading: Its mechanic is very similar to endless space 2 and it will give a boost to all companies. Civs will have to build the world trade center and branch office in cities. If a civ will not show interest in it can face financial problems.

Communication: These companies will be in the modern era and play an important role in building the internet, improving, and providing it. Later on, these companies can take spaceport or launcher for lease and can launch their communication satellite.

Espionage: These companies are shell/fake companies and can harbor activities and make networks. If the main shell company is eliminated all activities and spy missions will fail.

These companies will have stocks and stocks that can buy or sell by other companies. Saving companies that originated from your civ can give the economic edge over other civs.