Mario Gabelli acquired 182 Thousand Ultra Clean Hldgs shares worth $3.67 Million. That's 0.04% of their equity portfolio (365th largest holding). The first Ultra Clean Hldgs trade was made in Q4 2008. Since then Mario Gabelli bought shares one more times and sold shares on two occasions. The stake costed the investor $478 Thousand, netting the investor a gain of 668% so far.