David Haller engages in complex commercial litigation, including patent, antitrust, mergers and acquisitions, securities, real estate, trademark, copyright and bankruptcy litigation. He has defended and prosecuted numerous complex securities-related lawsuits for various financial services firms, including on appeal. He also has prosecuted several actions in connection with, and arising out of, hostile tender offers and proxy contests. He frequently represents parties in post-acquisition disputes, in particular involving complex accounting issues and employee malfeasance.
He has been involved in patent litigation in the federal courts and before the U.S. International Trade Commission. He also represents private and public companies in internal and regulatory investigations, particularly concerning securities and accounting issues. He is Managing Partner for Legal Personnel in New York and also coordinates the New York office’s pro bono representations.