Joel Greenblatt acquired 229 Thousand Omnicom Group shares worth $17.5 Million. That's 0.18% of their equity portfolio (116th largest holding). The first Omnicom Group trade was made in Q2 2011. Since then Joel Greenblatt bought shares 28 more times and sold shares on 26 occasions. The stake costed the investor $17.4 Million, netting the investor a gain of 0.2% so far.