The Brexiteer said meetings between Open Society Foundation and the European Commission should be looked into after Hungarian billionaire George Soros donated $18 billion to the think tank.
Mr Soros, who infamously made £1 billion on black Wednesday in 1992 when the pound devalued causing an economic crisis in Britain, transferred the “bulk of his wealth” to Open Society.
Speaking during a European Parliament debate on the Paradise Papers, Mr Farage questioned whether Mr Soros has spent billions to influence the EU, in order to undermine the nation state.
The Ukip MEP blast: “I say this at a time when the use of money and the influence it may have had on the Brexit result or the Trump election has reached a level of virtual hysteria.
“Just last week, the Electoral Commission in the UK launched an investigation to find out whether the Leave campaign took offshore money or Russian money.
“This came about as a result of questions asked in the House of Commons by one Ben Bradshaw, somebody linked to an organisation called Open Society.
“I just wonder when we’re talking about offshore money, when we’re talking about political subversion, when we’re talking about collusion, I wonder whether we’re looking in the wrong place.
“And, I say that because George Soros recently gave Open Society – his organisation, which campaigns for free movement of people and supports supranational structures like the European Union – $18 billion.
“His influence here and in Brussels is truly extraordinary.”
Mr Farage promised to delve into a so-called list of “reliable friends in the European Parliament” published in a book by Open Society.
The list contained the names of 226 people connected to the Brussels bloc, with Mr Farage promising to write to each one to establish any possible involvement with the think tank.
“If we’re going to have a debate, and we’re going to talk about full political and financial transparency, well, let’s do it,” he added.