U.S. federal prosecutors have charged two Brazilian nationals with insider trading in connection with 3G Capital’s $3.26 billion acquisition of Burger King in 2010.

The complaint announced Monday alleges that Waldyr Prado, a 43-year-old former Wells Fargo financial adviser, and one of his brokerage clients, Igor Cornelsen, illegally profited from insider information about the Burger King deal after Prado learned about it from another client who had invested in private-equity firm 3G.