David Tepper's position in NRG Energy is currently worth $331 Million. That's 5.56% of their entire equity portfolio (7th largest holding). The investor owns 1.11% of the outstanding NRG Energy stock. The first NRG Energy trade was made in Q1 2009. Since then David Tepper bought shares seven more times and sold shares on five occasions. The stake costed the investor $179 Million, netting the investor a gain of 85% so far.