Sullivan tries cases on behalf of public and private companies, prosecuting and defending a wide range of complex commercial claims in federal and state courts and arbitration proceedings. We have defended our clients' interests in class actions, securities, contract disputes, insurance coverage controversies, environmental issues, fraud claims, and bankruptcy and collections actions.

Internationally, and working closely with London disputes practice head Marian Boyle, we represent clients in multinational commercial disputes across a range of industries and sectors. We have particular expertise in finance, trade, construction and project disputes as well as professional negligence claims. We assist clients to resolve disputes through international arbitration, mediation and claims in domestic courts.

Representative Client Work

  • Representing the Export-Import Bank of the Republic of China in various sovereign debt collections, including successfully settling a 17-year-old judgment for the bank against the Republic of Niger. Through various federal and state post-judgment procedures, Sullivan obtained a temporary restraining order in federal court, restraining payment from a U.S. company to a Nigerian state-owned company. This led to negotiations in Paris and an eventual settlement
  • Obtained the dismissal of approximately $2 billion in common law claims brought by the Trustee for the Madoff Estate against our client in the United States District Court, Southern District of New York
  • Obtained a judgment of more than $40 million for a European bank against a Middle Eastern bank for the failure to reimburse on a so-called synthetic letter of credit. The defendant attempted to avoid reimbursement claiming it was not subject to jurisdiction and was defrauded in connection with the underlying transaction
  • Obtained the dismissal of approximately $59 billion in claims against our client Bank Austria, Bank Austria's corporate parent UniCredit S.p.A., sister company Pioneer Global Management S.p.A, and the former CEO of UniCredit, Alessandro Profumo. U.S. District Judge Rakoff ruled that the Madoff Trustee's RICO claims should be dismissed because the Trustee lacked standing to pursue the claims, the claims were barred by the Private Securities Litigation Reform Act ("PSLRA"), and that in any event the Trustee's pleadings failed to state actionable claims
  • Defended our client in two class action suits brought by investors of foreign funds involved in the Madoff Ponzi scheme, filed a joint motion to dismiss arguing that the suit should be dismissed for inconvenient forum. U.S. District Judge Richard M. Berman agreed dismissing the plaintiffs’ complaints
  • Represented independent trustees and mutual funds in various disputes with their advisors and/or third-party service providers. These matters are generally highly confidential, complex disputes requiring detailed factual analyses and involving arcane issues arising under both the Investment Company Act of 1940, as amended, as well as common law duties 
  • Represented banks and financial institutions in domestic and international litigation and arbitration involving trade credit disputes
  • Representing companies in toxic tort and environmental exposure cases, including the determination and allocation of liabilities and actions against other potential responsible parties and their insurance providers
  • Following trial, successfully negotiated resolution of a complicated dispute over a 62-year ground lease involving approximately four acres in the Kendall Square area of Cambridge, Massachusetts
  • Defended a maritime insurer against coverage claims of several hundred million dollars for asbestos-related illness
  • Represented a national insurance and financial securities company in numerous litigations, workouts and negotiated resolutions of securities, fiduciary and other claims arising out of three mezzanine investment funds
  • Represented a foreign manufacturer of optical fiber in a successful multimillion-dollar breach-of-contract claim against a domestic customer
  • Defended a unit of a major international accounting firm in lawsuits arising from the collapse of a software company
  • Represented both purchasers and sellers of companies and assets in post-closing disputes including alleged breach of representations and warranties, balance sheet adjustments, valuation controversies and indemnification rights

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