Mario Gabelli acquired 55.4 Thousand Citigroup shares worth $3.56 Million. That's 0.04% of their equity portfolio (377th largest holding). The first Citigroup trade was made in Q2 2011. Since then Mario Gabelli bought shares seventeen more times and sold shares on 34 occasions. The stake costed the investor $3.02 Million, netting the investor a gain of 18% so far.