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Originally from Rochester, Indiana, Mary has been practicing merger and antitrust law in New York City for almost 30 years. Mary has been Counsel in the Antitrust Group at Davis Polk & Wardwell since 2015, and is ranked in Band 4 by Chambers USA. Davis Polk, a global law firm with approximately 1000 attorneys working across 10 office locations, was named American Lawyer’s 2021 “Law Firm of the Year”.

At Davis Polk Mary has specialized in the areas of antitrust and competition counseling, with a focus on complying with and obtaining clearance under the Hart-Scott-Rodino Act and global merger control and foreign investment laws for U.S. and multinational acquisitions, divestitures and joint ventures. Mary advises transaction parties with respect to permissible pre-clearance and pre-closing activities. She also counsels clients regarding coordination and information sharing activities, and has been invited to participate in FTC discussions regarding HSR practice issues.

Prior to joining Davis Polk, Mary was Of Counsel in the Antitrust and Compliance Practice at Greenberg Traurig, and she spent 16 years in the Business Transactions Group at Schulte Roth and Zabel, working on securities offerings and reporting, mergers, corporate governance issues, antitrust compliance, and investment transactions involving private equity, venture capital and activist investors.

Mary regularly writes and speaks about US and international antitrust compliance. Since 2016 she has been the editor of Lexology / Getting the Deal Through’s Merger Control – United States chapter, and the editor of the antitrust aspects of Thompson Reuters’ Advising Private Funds treatise.

Mary has been active in the Antitrust Section of the American Bar Association since 2010, serving as Vice Chair of both the Mergers & Acquisitions Committee from 2013-2019 and Pricing Conduct Committee from 2010-2013. In 2023 she will be the Chair of the Antitrust Section of the New York State Bar Association. Mary is a Director on the Advisory Board of Keller Logistics Group in Defiance, Ohio.

Mary graduated With High Honors from the University of Notre Dame, majoring in philosophy and accounting, and has passed all four parts of the CPA exam. She received her JD from Georgetown University Law Center, where she was on the Georgetown Journal of Legal Ethics.

Mary has been active in her local parish, school Mothers’ Club, Girl Scouts, and the Northern Indiana Community Foundation, Defiance Area Foundation and the Women’s Giving Circle of Defiance County. Mary contributes to The Outlet Youth Center in Rochester, Indiana, the Defiance Dream Center, and various Rochester-area and Defiance-area projects, currently focusing on refurbishing and renovating the historic buildings at 300-304 Clinton Street in Defiance, Ohio.