Joel Greenblatt acquired 3.95 Thousand CSG Systems International shares worth $258 Thousand. That's 0.00% of their equity portfolio (1212th largest holding). The first CSG Systems International trade was made in Q4 2010. Since then Joel Greenblatt bought shares 21 more times and sold shares on nineteen occasions. The stake costed the investor $204 Thousand, netting the investor a gain of 27% so far.