Mario Gabelli acquired 46.3 Thousand O`Reilly Automotive shares worth $63 Million. That's 0.68% of their equity portfolio (27th 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 50 occasions. The stake costed the investor $3.47 Million, netting the investor a gain of 1717% so far.