The contents of the GM's handbook won't contain this but under the "Factions" section there will be a fairly wide range of different groups and organizations. Faction might not be an incredibly accurate word to use with these but it'll do for now. The list is probably incomplete, I think I've forgotten one or two but this is pretty much it:
Major factions - groups with a huge amount of influence
The Company - a syndicate of powerful individuals bent on controlling the global economy.
The New Crusade - a secret, church sponsored group out to put an end to the stranglehold of drugs and consumerism on society.
The Shadow Government - a whole illuminati, men in black, X files thing.
The Establishment - dedicated to protecting the british monarchy and to a lesser extent monarchies around the world associated with the British royal family.
The Shop - white hat mercenaries.
Black Book - black har mercenaries.
Agencies and government forces
Murder Inc - known for doing a lot of mafia work.
Bounty Hunters - semi legal law enforcement groups.
Creating your own faction
Faction resources and responsibilities.
Faction advantages and disadvantages.
Inserting your faction into the game - guidelines for adding your faction in a realistic manner and determining their relationship with others.
Each one will contain information on: their goals, their methods of hiring and operating, their history and notable individuals within the faction/group.