Thomas Messmore, president and CEO of UBS Asset Management (New York), and John Hock, head of marketing, have left the firm.
A spokeswoman wouldn't say why they left.
Union Bank of Switzerland, UBSAM's parent, announced Jim McCaughan and George Jamgochian have been appointed to succeed Messrs. Messmore and Hock, respectively.
Mr. McCaughan previously had been an adviser on institutional asset management at UBS in Zurich; Mr. Jamgochian was most recently head of North American business development for UBS Asset Management (London).
