Equity market transactions, such as company floats and share issuance, in the first six months of 2011 hit $412bn (£256.5bn), according to data provided by Thomson Reuters.
The bumper period handed investment banks a 22 per cent increase on the fees they recorded for the same period a year earlier, according to estimates from Freeman Consulting.
Fees from equity deals during the first half of 2011 totalled $10.8bn.
Goldman Sachs topped the league table for fees taken from equity market deals, taking $42.4bn from 137 deals and increasing its market share by 3.2 per cent.
Meanwhile, the total value of global debt market deals hit $3 trillion in the first six months of this year, a ten per cent increase on the same period a year earlier.
JP Morgan topped the list of banks handling debt market deals, with total proceeds of $212bn from just over 700 deals. Based on first half underwriting fees, JP Morgan topped all other underwriters with an estimated $932.8m.