John W. Rogers Jr.'s position in Schlumberger is currently worth $68.7M. That's 0.75% of their equity portfolio (40th largest holding). The first Schlumberger trade was made in Q2 2013. Since then John W. Rogers Jr. bought shares 23 more times and sold shares on nine occasions. The stake costed the investor $48.9M, netting the investor a gain of 40% so far.