Mario Gabelli acquired 399 Thousand Xylem shares worth $49 Million. That's 0.52% of their equity portfolio (44th largest holding). The first Xylem trade was made in Q4 2011. Since then Mario Gabelli bought shares ten more times and sold shares on 42 occasions. The stake costed the investor $10.7 Million, netting the investor a gain of 358% so far.