Gaming Companies
 

What are the major companies in the gaming industry?

Well it depends on what you mean by industry "leaders" there are alot of companies that arent as big but push the bars of gaming.
There are alot of branches known as 3rd party developers

Here are some of the big ones in my opinion not just in monetary value but in new technology and gaming

Epic
Created the Unreal Engines

Bungie

EA
DICE

Crytek

It's not about which companies are the biggest, its about finding the compnay you would like to work for the most, and going from there.
:)
Tell me if that helped any?
Check out
www.gamedevmap.com
They have lists of developers, production companies and so forth in your area

EA, Activision, and THQ can be found around or near LA.