Seth Klarman acquired 790k Unitedhealth Group shares worth $245M. That's 6.30% of their entire equity portfolio (10th largest holding). Seth Klarman started to build up the position in Unitedhealth Group in Q2 2008. Since then they sold 3.87M shares. The stake costed the investor $26.2M, netting the investor a gain of 837% so far.