Darden Restaurants, the nation’s largest casual dining operator, has enlisted the aide of two Am Law 100 firms in a growing battle with activist hedge funds pushing for changes at the company.

While Orlando-based Darden announced last week that it will spin off its Red Lobster brand, some investors want to see a complete breakup of the conglomerate, which also owns The Capital Grille, LongHorn Steakhouse and Olive Garden chains.