Seth Klarman acquired 790 Thousand Unitedhealth Group shares worth $389 Million. That's 12.09% of their entire equity portfolio (4th largest holding). Seth Klarman started to build up the position in Unitedhealth Group in Q2 2008. Since then they sold 3.87 Million shares. The stake costed the investor $26.2 Million, netting the investor a gain of 1389% so far.