Not content with his rousing turnaround of Mellon BankCorp., Frank V. Cahouet has engineered a series of audacious acquisitions that will transform the Pittsburgh-based company into a fee-driven leviathan.

The ball got rolling in September, when Mr. Cahouet plunked down $1.45 billion for Boston Co., with $9.2 billion of banking assets and nearly $300 billion of trust assets. Then, in a stunning move, Mr. Cahouet in December agreed to pay $1.85 billion for Dreyfus Corp., the nation's sixth largest mutual fund company.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.