Joel Greenblatt acquired 226 Thousand Microsoft shares worth $99.1 Million. That's 1.00% of their equity portfolio (6th largest holding). The first Microsoft trade was made in Q4 2010. Since then Joel Greenblatt bought shares 25 more times and sold shares on 29 occasions. The stake costed the investor $28.4 Million, netting the investor a gain of 248% so far.