Seth Klarman acquired 21.9 Million SLM shares worth $700 Million. That's 23.25% of their entire equity portfolio (2nd largest holding). The investor owns 10.65% of the outstanding SLM stock. The first SLM trade was made in Q1 2007. Since then Seth Klarman bought shares two more times and sold shares on one occasions. The stake costed the investor $328 Million, netting the investor a gain of 114% so far.