Sam Ricketts and Dan Reynolds assumed the role of co-heads of the New Zealand investment bank, and Silvana Schenone was previously named as co-head of Investment Banking NZ, alongside Ricketts.
Lee started with Jarden, then called Credit Suisse First Boston, in December 2000 as a junior trader.
In 2017, with the firm then known as First NZ Capital, Lee took over as CEO.
“James now wishes to spend time with his young children before his next career move,” the firm said in a statement.
“We acknowledge and appreciate James’ significant contribution to the Group during his many years and wish him well into the future.”
In a recent interview with the Herald, Lee said New Zealand still remained a relevant market for investors.
“I don’t view the New Zealand market as being in a terminal state,” he said.
“The NZX has a clear place in the market and the ASX has a clear place in the market for clients,” he added.