 The fund estimates that portfolio companies and awardees have raised close to $1B in follow-on investment and private funding following ETF investment yet this is self reported information and has not been audited .Cardiospectra, Inc., an ETF portfolio company, was acquired by Volcano Corporation in December 2007 for $25M in cash with an additional $38M available upon the achievement of specific milestones.ETF's return on investment on the Cardiospectra deal was 216% as of January 2011.