John W. Rogers Jr. acquired 817k Bio-Rad Laboratories shares worth $308M. That's 3.32% of their equity portfolio (7th largest holding). The investor owns 3.04% 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 23 more times and sold shares on 30 occasions. The stake costed the investor $162M, netting the investor a gain of 90% so far.