Jeremy Grantham acquired 664 Thousand NRG Energy shares worth $30.4 Million. That's 0.16% of their equity portfolio (107th largest holding). The first NRG Energy trade was made in Q1 2013. Since then Jeremy Grantham bought shares seven more times and sold shares on twelve occasions. The stake costed the investor $24.7 Million, netting the investor a gain of 23% so far.