A landmark of American capitalism is set to change hands again and a cadre of Am Law 100 lawyers couldn’t be happier about the potential bonanza in legal fees the deal could generate.

Sullivan & Cromwell, Shearman & Sterling, and Wachtell, Lipton, Rosen & Katz are among the firms advising on the proposed $8.2 billion cash-and-stock sale of NYSE Euronext—parent company of the New York Stock Exchange—to the Atlanta-based IntercontinentalExchange (ICE).