Julius Baer Holding Wednesday disclosed details on the planned listing of U.S. fund manager Artio, in a deal that could generate as much as $500 million in proceeds for the Swiss private bank.

Julius Baer, based in Zurich, said its subsidiary Artio Global Investors has started presentations to investors about a planed initial public offering of 23.4 million shares. The proposed offering is expected to price and be completed by Sept. 30.