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Mark is an antitrust lawyer whose practice focuses on merger control, including filings under the Hart-Scott-Rodino (HSR) Act and similar “merger control” laws around the world. Mark has represented clients in merger investigations by the U.S. Department of Justice and Federal Trade Commission. Mark recently completed a secondment with a global power management company where he served as in-house competition counsel. He also is an experienced litigator who has represented clients in state and federal trial and appellate courts, arbitration tribunals, and administrative proceedings involving antitrust, competition, and other complex claims, including class actions. He has argued appeals before the U.S. Court of Appeals for the Sixth Circuit and the Ohio Court of Appeals and represented clients in appeals before other appellate courts, including the New York Court of Appeals and the U.S. Court of Appeals for the Ninth Circuit. Mark also has represented companies and individuals facing criminal inquiries and investigation. He is an active participant in the firm’s pro bono practice.

In a 2021 Executive Order on Promoting Competition in the American Economy, President Biden referred to antitrust as the “first line of defense against the monopolization of the American economy.”  Now—in the parlance of a time-honored coaching cliché—the Administration is strengthening that defense by going on offense.

During remarks at two recent American Bar