The most powerful organisation in the world, could be the mighty US Federal Reserve.
The Central Bank to the world’s most dynamic and largest economy. Home to companies like Amazon, Google, IBM, Intel, Ford, BT Private Wires and S-One Communications.

https://www.federalreserve.gov/releases/h41/current/h41.htm

Look at the current size of the balance sheet.

4,453,820 MILLION on Wed March 23rd 2016

That is $4.45 TRILLION

That is over 25% of the size of the US National GDP. It is absolutely massive.