The figures run contrary to speculation among analysts that ETPs have fared less well in 2011.
Source was launched in April 2009 and is a specialist provider of ETPs for European investors.
It has a diverse range of products and has £5bn in assets under management across equities, commodities, fixed income and alternative assets.
Source suggested the popularity was due to investors seeing ETPs as a transparent, low cost trading and investment tool and that investors valued receiving information about their investments, especially in current volatile markets.
It also said the use of derivatives and stock lending was a key issue for investors but they were comfortable with them so long as the risks were well controlled and diversified.
Regarding the outlook for 2012, the firm forecast the ETP market would expand rapidly but improved products and greater liquidity was needed.
ETP on-exchange trading currently only represents five per cent of equity on-exchange trading volumes in Europe compared to 25 per cent in the USA. Source hopes increased liquidity and trading activity will change this next year.