Mario Gabelli's position in Masimo is currently worth $11.7 Million. That's 0.12% of their equity portfolio (195th largest holding). Mario Gabelli started to build up the position in Masimo in Q4 2013 and continued to invest until Q4 2014. Since then they sold 49.5 Thousand shares. The stake costed the investor $2.29 Million, netting the investor a gain of 409% so far.