Mario Gabelli acquired 5.16 Thousand AMGEN shares worth $1.41 Million. That's 0.01% of their equity portfolio (516th largest holding). The first AMGEN trade was made in Q1 2001. Since then Mario Gabelli bought shares 34 more times and sold shares on 44 occasions. The stake costed the investor $332 Thousand, netting the investor a gain of 325% so far.