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Shearman & Sterling LLP

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Henry Weisburg

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Shearman & Sterling LLP

Work Department

International Arbitration


Partner in Shearman & Sterling's International Arbitration practice


Henry Weisburg is a partner in the International Arbitration and Litigation practices.

He focuses on the resolution of cross-border financial disputes arising out of investments, projects and joint ventures, expropriations, banking insolvencies, sovereign debt restructurings and similar matters.

Henry represents clients in international arbitrations in proceedings administered by many different bodies, including the ICC, ICSID, AAA and LCIA, as well as in ad hoc proceedings.

In addition, Henry regularly appears in domestic courts with respect to issues such as the construction and enforcement of arbitration clauses, arbitral awards and foreign judgments, sovereign immunity issues and matters involving torts under international law. He also acts as arbitrator.

Henry Weisburg has been praised by clients and peers in leading directories as “tremendously smart” and a “hugely experienced” and “very impressive” lawyer with an “electric intellect” who “always has his strategy clearly defined” and is “excellent at preparing a case.”


  • Director, New York International Arbitration Center (NYIAC)
  • Member, Task Force on the Revision of the ICC Rules of Arbitration
  • Member, New York State Bar Association Task Force on New York Law in International Matters
  • Founding Member, The International Arbitration Club of New York
  • Member, London Court of International Arbitration (LCIA)
  • Member, International Arbitration Institute (IAI)
  • Member, American Society of International Law (ASIL)
  • Member, American Bar Association (ABA)


  • New York University School of Law, J.D.
  • Trinity College, B.A.

Latin America: International firms

International arbitration

Within: International arbitration

Shearman & Sterling LLP handles a broad range of commercial and investment treaty arbitration. In 2017, a team led by Paris-based Emmanuel Gaillard and Yas Banifatemi represented a Mexican company in a dispute under a BIT signed with a European state. Within its network of offices, New York-based Henry Weisburg and Washington DC-based Christopher Ryan and Jonathan Greenblatt are also names to note.

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United States: Dispute resolution

International arbitration

Within: Leading lawyers

Henry Weisburg - Shearman & Sterling LLP

Within: International arbitration

At Shearman & Sterling LLP, New York-based team head Henry Weisburg and Christopher Ryan in Washington DC are representing the Republic of Panama in treaty claims brought by Omega Engineering and its CEO relating to the alleged expropriation of multiple infrastructure construction projects under the US-Panama BIT. Recently promoted partner Daniel Reich, who splits his time between the Paris and New York offices and Mark McNeill, who divides his time between New York and London, are representing Cairn Energy in a treaty claim against the Republic of India, under the UK-India BIT. Jonathan Greenblatt, who is ‘a consummate team builder’ and ‘provides novel solutions in tough situations’, splits his time between New York and Washington DC. Recently promoted counsel Jonathan Tompkins, who is based in New York, is also noted.

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International litigation

Within: International litigation

Shearman & Sterling LLP is ‘a truly international firm that is more globally integrated than some of its competitors’ and has ‘a reputation that extends far beyond the US’. The firm advises multinational corporations and financial institutions on high-profile matters including global investigations, Foreign Corrupt Practices Act (FCPA) matters and US-based litigation involving non-US entities. In New York, global head of litigation Adam Hakki, who advised underwriters of the Alibaba IPO on a securities class action, and deputy head of the litigation department Richard Schwed are recommended. Schwed regularly handles cross-border matters relating to contested mergers and acquisitions, antitrust cases and financial services litigation. With Henry Weisburg and Washington DC-based Christopher Ryan, he sought enforcement of arbitral awards to secure a $50bn payment from the Russian Federation after its expropriation of investments in the former Yukos Oil Company. Paula Anderson is a rising star.

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