Skip to Main Content

Arthur W. Hahn

Of Counsel
Chicago Office

Arthur W. Hahn is global co-chair of Katten's Financial Services practice and a member of the firm's Board of Directors. He represents major international banks and brokerage firms, international equity and commodity exchanges, and clearinghouses and technology companies in connection with their regulatory, business and litigation needs.

An experienced counselor to financial institutions, Arthur represents his clients' interests whether he is interfacing with exchanges, supervising regulatory compliance, advising on principal trading and sales practices issues, or overseeing litigation and enforcement matters. He provides valued guidance on business structuring and strategy, trading rules, technology initiatives, cross-border Securities and Exchange Commission (SEC) and Commodity Futures Trading Commission (CFTC) licenses, and international insolvency issues. In addition, Arthur counsels companies regarding capital formation and mergers and acquisitions.

His clients include the LCH.Clearnet Group, Bank of New York Mellon Corporation, The Mexican Derivatives Exchange (MexDer), Barclays and CalPERS. Arthur also provides experienced counsel on legal issues involving high-frequency trading. He is regularly involved in enforcement matters and securities litigation and is a certified mediator, focusing on resolving financial instruments and markets disputes. He is a sought-after lecturer and author on subjects relating to all facets of financial services.

As a member of the Board of Directors of the Futures Industry Association, Arthur is involved in rulemaking and policy discussions involving industry leaders, regulators and legislators. 

Shown below is a selection of Arthur’s engagements.


Chambers USA, 2017–2019
Legal 500, 2016, 2018–2019
Chambers Global, Capital Markets: Derivatives – USA, 2018–2019
Super Lawyers, Illinois, 2005–2011, 2013–2019
Best Lawyers in America, 2009–2019

Leading Lawyers Network

Leading Lawyers Network, Top 250 Leading Business Lawyers in Illinois, 2014
Firm News
Arthur W. Hahn


  • JD, Northwestern University School of Law
  • BA, Miami University
  • The London School of Economics and Political Science

Bar Admissions

  • Illinois


Chambers USA
Legal 500
2016, 2018–2019
Chambers Global
Capital Markets: Derivatives – USA, 2018–2019
Super Lawyers
Illinois, 2005–2011, 2013–2019
Best Lawyers in America

Leading Lawyers Network

Top 250 Leading Business Lawyers in Illinois, 2014
Previous Next


  • American Arbitration Association
  • Futures Industry Association, Board of Directors
  • Institute for Financial Markets, Executive Committee and Board of Directors
  • Legal Club of Chicago
  • Oxford Press Capital Markets Law Journal, Editorial Board
  • Panel of Recognised International Market Experts in Finance (P.R.I.M.E.)
  • Ravinia Festival, Board of Trustees
  • The Chicago Council on Global Affairs
  • The Economic Club
  • National Futures Association, Board of Directors
Katten Websites   Careers  |  Alumni  |  Mobile Site
Contact Us   Offices  |  Media Center  |  People  |  Email
Legal Notices   Disclaimer  |  Privacy Notice  |  Cookie Notice  |  United Kingdom Notices  | Accessibility 
Attorney Advertisting. © 2019 Katten Muchin Rosenman LLP