Lobbyist Annie Hall is suing Bank One Corp. for $15 million, claiming age and sex discrimination as well as "extensive retaliation" by superiors. The suit also names the company's president, Verne G. Istock, and a senior vice president, Gerald E. Buldak.

Ms. Hall was ousted in March after 17 years at Bank One, which has been undergoing a wrenching reorganization. In her complaint, Ms. Hall alleged that after the 1998 merger of what was then Columbus, Ohio-based Banc One with First Chicago NBD Corp. she was "systematically discriminated against on the basis of her sex and age." She alleged that her pay and title, among other things, were affected.

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