Alright, I made some companies, have a look

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Coldiron Industires

Coldiron is located in what was the southern polar ice caps back before the war. Unlike many other companies, they use giant ships and large rigs as factories and buildings as there is very little space to actually build on land since much of the ice has melted. They comb and mine the ocean floor for resources which has resulted in their NCMs and sea-borne vehicles to be very resistance to pressure and sometimes some of the most armored of any other company. Their NCMs are incredibly effective in otherwise hazardous environments and many of their technologies are well suited for aircraft as its built to with stand high pressure and freezing cold temperatures. Their colors tend to be white and shades of blue and lighter blues.

Toyomomi Technology Corp

The TTC is based in what is left of Korea and Japan. While it is a small ruling company, it excels at nano-technology with many of its creations able to transform or alter themselves in some way. They have a number of special creations to help their cause such as the Geass Perpetual Motion Drive, Projected Wire Anchors and High Frequency weaponry. Their equipment often runs with black and gold colors with a light grey being thrown in sometimes.

Archer-Oswalt Productions

A ruling company based on the remains of a largely untouched Australia, their hovercraft and low altitude flight abilities are second to none. ArOs vehicles are incredibly flexible in their uses since they aren't bothered by things such as rough terrain. Weapon wise, they enjoy the idea of using focused beams of energies and solar power. They have rapidly expanded into the rest of Oceania and Polynesia and are pushing on Asian companies. Their colors are shades of tan, biege and brown.