The Globe and Mail reports in its Friday edition that Bank of Montreal is shaking up its executive ranks as the lender aims to expand its business and realigns its U.S. division. The Globe's Stefanie Marotta writes that the bank is rejigging the structure of its U.S. operation as it looks to rebuild its profitability. It is combining its key businesses south of the border and installing several new senior leaders -- including an executive from a major U.S. bank -- to sit at the CEO table. BMO has been working to revive its return on equity. Chief executive officer Darryl White said the changes will help improve the bank's performance through improved collaboration, artificial intelligence and technology integration, and better client advice and service. Among the changes, BMO is bringing in an executive from Bank of America to lead three of BMO's U.S. units. Aron Levine will oversee the U.S. personal and business banking, commercial banking, and wealth management divisions. Mr. Levine has spent three decades working in U.S. banking, with roles spanning consumer banking, wealth management, corporate strategy and commercial real estate finance. He will report to Mr. White and Darrel Hackett, CEO of BMO's U.S. business.