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National Security Regulatory Practice

Multinational corporations, state-owned enterprises, and investment funds routinely rely on our National Security Regulatory Practice for advice on their most significant cross-border investments and transactions. Working in close coordination with our globally recognized M&A group, we address regulatory concerns arising out of acquisitions of and other investments in U.S. businesses, including national security reviews (CFIUS), export controls, classified government contracting, economic sanctions and anti-money laundering. 


Clients specifically seek our advice on navigating national security reviews of proposed transactions or investments in the U.S. before the Committee on Foreign Investment in the United States (CFIUS) and related regulatory reviews by the Defense Counterintelligence and Security Agency (DCSA). With consideration of the evolving landscape and increasingly expansive view of national security, we provide clients an informed assessment of CFIUS risk, develop creative solutions to minimize that risk, and in the event a transaction comes under CFIUS review, work closely with CFIUS representatives to seek approval of the transaction with minimal or no conditions. It is our extensive experience advising clients on national security reviews before the CFIUS and unparalleled ability to draw upon leading legal experts in the cross-border M&A sector that sets us apart.

In addition, financial institutions, private equity firms, and domestic and foreign issuers of securities routinely seek our counsel on economic sanctions matters as well as guidance on export control issues, most frequently in connection with CFIUS reviews, under the Export Administration Regulations (EAR) and the International Traffic in Arms Regulations (ITAR).

“The national security regulatory practice at Simpson Thacher & Bartlett LLP is regularly sought after by major corporates, private equity sponsors and state-owned enterprises to advise on transactional matters.”
The Legal 500 U.S. 2022

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