Arthur S. Long advises clients on all aspects of financial institutions regulation. Mr. Long draws on extensive industry knowledge to help non-US and US financial institutions navigate:

  • The regulatory aspects of M&A and capital markets transactions
  • Bank regulatory compliance issues
  • Dodd-Frank issues, including the regulation of systemically significant banks and related heightened capital and liquidity requirements
  • Resolution planning
  • Volcker Rule issues with respect to bank proprietary trading and private equity fund/hedge fund operations

He has significant experience with bank securities offerings and issues unique to foreign banks operating or seeking to operate in the United States. Mr. Long also counsels fintech companies on the regulatory issues that relate to their businesses, as well as advises on virtual currency and blockchain technology regulation.

Mr. Long is a recognized thought leader whose publications include “The Financial Services Regulation Deskbook”, the Practising Law Institute treatise on the Dodd-Frank Act, and “The New Autarky? How U.S. and UK Domestic and Foreign Banking Proposals Threaten Global Growth” for the Cato Institute.

Before joining Latham, Mr. Long was a partner at another leading law firm. He served as law clerk to US Supreme Court Justice Clarence Thomas from 1997 to 1998 and to US Court of Appeals for the Fourth Circuit Judge J. Michael Luttig from 1993 to 1994.

Mr. Long’s recent experience includes:


  • Madison Dearborn Partners on its acquisition of the collective investment fund business of Wilmington Trust
  • Wealthfront on its proposed sale to UBS AG in an all-cash US$1.4 billion transaction*
  • A leading financial services firm on a proposed national trust bank that would serve as a clearance and settlement system for corporate loans*
  • Hazel, the Walmart-Ribbit Capital joint venture, on its acquisition of ONE Finance*
  • GE Capital on the sale of its retail bank deposit program to Goldman Sachs, the first expansionary transaction by a global systemically important bank (G-SIB) since the financial crisis*
  • Grupo Financiero Ficohsa on its purchase of Citigroup’s banking and credit card operations in Honduras and Nicaragua*
  • The conversion of Banco Santander’s principal US depository institution from a federal thrift to national bank*
  • Banco Santander on its acquisition of Sovereign Bancorp, which resulted in protested applications to the Federal Reserve Board, the Office of Thrift Supervision, and the New York State Banking Department*

Financial Crisis

  • The Federal Reserve Bank of New York on its emergency loan to American International Group*
  • Her Majesty’s Treasury on its plan to provide support to the UK banking system, including obtaining relief from the US Bank Holding Company Act for the UK-government company that was the majority shareholder of The Royal Bank of Scotland Group and Lloyds Banking Group*
  • Morgan Stanley on becoming a bank holding company and conforming its global operations to the Bank Holding Company Act*
  • Citigroup on its proposed rescue of Wachovia and Federal Deposit Insurance Corporation assistance and its sale of its retail brokerage business to Morgan Stanley*
  • One of the first-round filing international banks on its resolution plan required by Section 165 of the Dodd-Frank Act*

*Matter handled prior to joining Latham

Bar Qualification

  • New York


  • JD, Harvard Law School, 1993
    magna cum laude
  • AB, Harvard College, 1989
    magna cum laude