Mario Gabelli acquired 637k O`Reilly Automotive shares worth $67M. That's 0.61% of their equity portfolio (28th 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 52 occasions. The stake costed the investor $3.18M, netting the investor a gain of 2005% so far.