Joel Greenblatt acquired 66.8 Thousand Oneok shares worth $5.45 Million. That's 0.04% of their equity portfolio (504th largest holding). The first Oneok trade was made in Q1 2016. Since then Joel Greenblatt bought shares fifteen more times and sold shares on thirteen occasions. The stake costed the investor $4.89 Million, netting the investor a gain of 11% so far.