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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.

  • Represents a leading financial institution in MDL antitrust litigation involving trading of aluminum and zinc.
  • Represents leading vodka brand in trademark litigation in New York Federal court.
  • Represents Huawei Technologies in ITC proceeding, and litigation in federal court, concerning patent, contractual and equitable claims.
  • Represented Shire in the Southern District of New York in a patent infringement and breach of contract action concerning Shire’s ADDERALL XR® product for the treatment of ADHD.
  • Represented Shire in the Southern District of New York in ANDA cases concerning Shire’s Fosrenol® product.
  • Represented defendant in WorldHomeCenter v. KWC America, an action asserting antitrust and consumer protection law claims.  2011 U.S. Dist. LEXIS 104496 (S.D.N.Y. Sept. 15, 2011).
  • Represented commodity trading firms in bankruptcy proceedings of counterparty engaged in fraud.
  • Represents underwriting syndicate in class action alleging claims under Sections 11 and 12 of Securities Act and Section 10(b) of Exchange Act.
  • Represents Kowa Pharmaceuticals in an appraisal action in Delaware Chancery Court.
  • Represented defendant in multi-district securities litigation arising from the Parmalat fraud.
  • Represented a global financial services firm in an action brought by companies that insured principal and interest payments for a collateralized debt securitization.
  • Represented lead defendants in Courtney et al. v. Halleran et al., a class action by underinsured depositors of an insolvent savings bank.  2004 U.S. Dist. LEXIS 18795 (Sep. 17, 2004), reconsideration granted in part, and injunction denied, 2005 U.S. Dist. LEXIS 3907 (N.D. Ill., Feb. 1, 2005), aff'd, 485 F.3d 942 (7th Cir. 2007). 
  • Represented defendant in Phillips et al. v. Coast-to-Coast Fin. Corp. et al., No. 03-C-153-M (Cir. Ct., McDowell Cty., W. Va.), an alleged predatory lending case.
  • Represented plaintiffs in Atlantow Associates et al. v. Cole et al., No. 40315/2005 (E.D.N.Y.), an action seeking to enjoin a sale of an apartment complex and for other relief.
  • Represented defendants in Augienello et al. v. Coast-to-Coast Fin. Corp. et al., an action by former officers and directors of an insolvent savings bank. 2002 U.S. Dist. LEXIS 14584 (S.D.N.Y. Aug. 7, 2002), aff’d, 2003 U.S. App. LEXIS 8770 (2d Cir. May 9, 2003).
  • Represented defendants-respondents on appeal in Certain Underwriters at Lloyds, London et al. v. Mobil Corp. et al., an insurance coverage case relating to environmental contamination, dismissed based on forum non conveniens. 756 N.Y.S.2d 204 (1st Dep't 2003).
  • Represented defendants in Ardent Liquidating, LLC v. KKR 1996 Fund LLP et al., Case No. 01-2086, Adv. No. A02-10041 (Bankr. D.D.C.), an adversary proceeding in bankruptcy court seeking recovery based on a deepening insolvency theory.

Pro Bono

  • Represents incarcerated criminal defendant seeking clemency.
  • Represents adoptive mother in contested adoption proceeding.
  • Represented victim of race discrimination.
  • Represented parent of firefighter victim of 9/11 attacks.
  • Represented mentally disabled mother seeking to restore custody of child.

Memberships and Affiliations

  • New York City and County Bar Associations, Joint Committee on Legal Referral Service
  • New York Super Lawyers, Business Litigation, Securities Litigation, and Appellate (2013-2016)