EA is primarly a publisher:
- who fully owns these studios (Dice, Westwood, EA sports, Bioware, Pandemic, Criterion, Black Box ...) in other words they own the IPs and are responsible for the output.
- and distributes third party titles (Valve's Orange Box, Crytek - not even sure that EA doesn't even have a stake in Crytek. Without EA there is no way Crytek would have done Crysis, no other publisher would have risked a PC only title that costs so much, not even Ubi)