Mario Gabelli's position in Marsh & McLennan Cos. is currently worth $4.25 Million. That's 0.04% of their equity portfolio (349th largest holding). The first Marsh & McLennan Cos. trade was made in Q1 2001. Since then Mario Gabelli bought shares twenty more times and sold shares on 40 occasions. The stake costed the investor $2.11 Million, netting the investor a gain of 102% so far.