As mentioned, a lot of EA games use Frostbite.
A lot of other EA games (sports) use another engine.
id has an inhouse engine
Valve has an inhouse engine
Riot has an inhouse engine
CDProjekt ..
NaughtyDog ..
Ubisoft ..
Guerrilla ..
Activision/Blizzard have at least 2 ..
...
Shit even Amazon has an engine these days