"No clients are bringing it up. It's almost a non-event." BankAmerica officials refused to discuss the lawsuits, other than to declare them "without merit," said spokesman Robert Stickler. They vow to "defend them vigorously." Wachtell Lipton Rosen & Katz in New York represents BankAmerica in the cases. The plaintiff attorneys, all frequent filers of shareholder actions, include Abbey Gardy & Squitieri, Bernstein Litowitz Berger & Grossman, Milberg Weiss Bershad Hynes & Lerach, and Wolf Popper. The petitions seek damages for several different classes of investors. Among them are shareholders who were eligible to cast a vote on the merger, which closed Sept. 30, and individuals who traded put or call options related to the deal.