Rory O’Halloran

Rory O’Halloran


Rory represents U.S. and international clients in a broad range of public and private M&A transactions, including in complex cross-border transactions, joint ventures and unsolicited transactions. His experience also includes special committee representations as well as advising clients on corporate governance matters.


Representative matters

General Electric Company in various matters including:  the acquisition of Nexus Controls; the combination of GE Oil & Gas with Baker Hughes Incorporated to create a new publicly traded company; the sale of the GE Energy Financial Services project finance debt business; and the sale of GE Asset Management to State Street Corporation.

Intercontinental Exchange in various matters including:  the acquisition of Black Knight, and related divestiture transactions; the acquisition of Ellie Mae; the acquisitions of the Chicago Stock Exchange and the National Stock Exchange; the acquisitions of TMC Bonds and BondPoint; the acquisition of Simplifile; and the sale of its IDMS business to FactSet.

Anglo American in various matters including:  its proposed joint venture with Vale involving the acquisition by Anglo American Brasil of the Serra da Serpentina iron ore resource and the concurrent acquisition by Vale of a 15% shareholding in Anglo American Brasil; Mitsubishi Corporation’s investment in Anglo American’s Quellaveco copper project (Peru) and the negotiation of related joint venture arrangements; the sale of its Anglo American Norte copper business in Chile to an investor consortium led by Audley Capital; its sales to Mitsubishi Corporation and Codelco of minority shareholdings in Anglo American Sur (Chile) and the negotiation of related partnership arrangements; and the sale of its Moly-Cop and AltaSteel businesses to OneSteel.

ArcelorMittal in various matters including:  the joint acquisition (with Nippon Steel) of Essar Steel; the joint acquisition (with Nippon Steel) of ThyssenKrupp Steel USA; and the sale of a 15% interest in its Labrador Trough iron ore mining and infrastructure assets in Canada to a consortium led by POSCO of Korea and China Steel Corporation.

Pro bono

Rory has been active for many years in representing pro bono clients The Mexican Fund for the Conservation of Nature (Fondo Mexicano para la Conservación de la Naturaleza) (FMCN) and the Mesoamerican Reef Fund (MAR Fund).

FMCN is a Mexican non-profit organization that serves as a private financial intermediary for the conservation of the biological richness of Mexico. Rory’s work here includes representing FMCN in its participation in arrangements relating to the financing, production and marketing of the IMAX film “Flight of the Butterflies”, which chronicles the annual migration of monarch butterflies from the United States and Canada to Mexico and debuted at the Smithsonian’s National Museum of Natural History in Washington, D.C.

MAR Fund is a non-profit organization that focuses on regional funding and partnerships for the conservation, restoration, and sustainable use of the Mesoamerican Reef in Belize, Guatemala, Honduras, and Mexico.

Leadership Positions And Professional Affiliations

Member, New York City Bar Association
He is outstanding. He has one of the calmest demeanors I have ever come across.
Chambers, 2016


  • Recommended lawyer M&A/Corporate and Commercial: M&A: Large Deals ($1BN+) Legal 500 2023, 2021



New York, 2006


B.S., Boston College, 2002
J.D., Tulane University, 2005
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.