U.S. Sues to Block Aon’s $30 Billion Willis Towers Deal (2)

The U.S. Justice Department sued to block Aon Plc’s proposed $30 billion acquisition of Willis Towers Watson Plc, saying the deal to create the world’s largest insurance brokerage is anticompetitive.

The department’s antitrust division filed a lawsuit in federal court in Washington Wednesday asking a judge to stop the deal, arguing that it would create too much concentration in the market and hurt businesses, their employees and retirees.

“Today’s action demonstrates the Justice Department’s commitment to stopping harmful consolidation and preserving competition that directly and indirectly benefits Americans across the country,” Attorney General Merrick Garland said in a ...