Carlin operates an electronic trade execution platform, with a large following among emerging hedge fund managers and professional traders, and RBC said the deal would provide significant inroads into the North American hedge fund industry.
"We believe that this acquisition allows us to create a leading North American electronic execution platform for investors and expand into multi-asset class electronic trading," said Greg Mills, RBC Capital Markets' head of global equity sales and trading.
Mr Mills added that: "Emerging hedge fund managers, professional traders and other clients of the CFG [Carlin Financial Group] Business will continue to receive the same high quality of service they've come to rely on."
It expected that the acquisition will help RBC continue to build its capabilities and client base in the US.
The financial terms of the deal were not announced.