Nobody knows. The names of the original investors of the Federal Reserve were never released. They put up the original money for the 'reserve' the fed uses, who earn interest on the many times that amount that was loaned out, ie fractional reserve banking. I think they used that initial money to buy up government bonds, then loan 10-100 (or more till the number doesn't matter) times that much to business and the government and reap the interest.
There is a lot of evidence (check out the moneymasters on google video) that many if not most or all of them were the elite British bankers. This small group including the Rothschild's owned much of the worlds wealth for a long time (probably still do today).
They likely have most or all of the gold that was in Fort Knox (whoever 'they' are sense they don't tell anybody), remember this gold was collected from America it was our gold. Many believe it's gone now, control of it was given to the fed and no one ever checked on it afterwards (no audit for 50ish years I shit you not).
It's not even specifically known which banks the fed works for/answers too. The whole thing is shrouded in massive secrecy and total media blackout. Ron has been challenging the fed for over 20 years, but according to the media it's a completely natural and necessary part of every country (the central bank).
It's on the news everyday (presented in a good light as being beneficial for the people I might add) that foreign companies are buying up massive amounts of US businesses and property, even whole markets. Many of the elite US companies are moving to Dubai ala Haliburton.
Draw your own conclusions.
EDIT: I finished your linked article. The articles he references could never be proved, nor the authors rosy account of who owns them, since they have never told anybody in a way that could be verified. Just remember every time they say "we are lending more to help the market" they mean "we are creating money from nothing and reaping huge interest profits, essentially absorbing the wealth from the monetary system, to help the market".