Mario Gabelli acquired 24.5 Thousand Brooks Automation shares worth $2.77 Million. That's 0.03% of their equity portfolio (421st largest holding). Mario Gabelli acquired their 24.5 Thousand shares in Q3 2009. So far they never sold any shares in the company. The stake costed the investor $154 Thousand, netting the investor a gain of 1702% so far.