Mario Gabelli acquired 652 Thousand O`Reilly Automotive shares worth $58.1 Million. That's 0.60% of their equity portfolio (34th largest holding). The first O`Reilly Automotive trade was made in Q1 2011. Since then Mario Gabelli bought shares five more times and sold shares on 51 occasions. The stake costed the investor $3.25 Million, netting the investor a gain of 1687% so far.