Joel Greenblatt acquired 99.2 Thousand Biogen shares worth $12.5 Million. That's 0.10% of their equity portfolio (260th largest holding). The first Biogen trade was made in Q4 2010. Since then Joel Greenblatt bought shares 23 more times and sold shares on 25 occasions. The investor's estimated purchase price is $18.4 Million, resulting in a loss of 32%.