John W. Rogers Jr. acquired 786k Bio-Rad Laboratories shares worth $229M. That's 2.43% of their equity portfolio (12th largest holding). The investor owns 2.87% of the outstanding Bio-Rad Laboratories stock. The first Bio-Rad Laboratories trade was made in Q1 2013. Since then John W. Rogers Jr. bought shares 22 more times and sold shares on 30 occasions. The stake costed the investor $155M, netting the investor a gain of 47% so far.