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Catherine M. Clarkin


Catherine M. Clarkin

New York +1-212-558-4175+1-212-558-4175 +1-212-558-3588+1-212-558-3588
[email protected]
Cathy Clarkin is a partner in Sullivan & Cromwell’s Capital Markets and Financial Institutions Groups and is a co-head of the Firm’s Capital Markets Group. She advises clients on a wide variety of capital market transactions across a broad range of industries. Ms. Clarkin has extensive experience in public and private offerings of equity and debt securities by U.S. and non-U.S. issuers, including IPOs, secondary offerings, complex debt issuances, liability management transactions and securities issued in connection with mergers, acquisitions and joint ventures. She regularly advises a broad range of clients on ongoing public company matters, including corporate governance and disclosure matters.

Ms. Clarkin has participated in multiple panels for the Practising Law Institute, including the most recent “What’s New in Securities Law? Traps for the Unwary.”

Rankings and Recognitions
  • The Legal 500 U.S. – recognized for Capital Markets: Debt Offerings (2017, 2018), Capital Markets: Equity Offerings (2017, 2018), and Capital Markets: Global Offerings (2018)
  • Euromoney Legal Media Group Americas Women in Business Law Awards – shortlisted “Best in Capital Markets” (2017)
  • Law360 – won “Capital Markets MVP” award (2016)


Selected IPOs
  • Artisan Partners Asset Management Inc. in its $331 million IPO and NYSE listing
  • Underwriters in connection with the $150 million IPO and NYSE listing by Cadence Bancorporation 
  • First Hawaiian Bank in its $557.7 million IPO, spinoff from BNP Paribas, and NASDAQ listing
  • First Republic Bank in its $323 million IPO and NYSE listing
  • National Australia Bank in the IPO and NYSE listing of its U.S. bank subsidiary, Great Western Bancorp, Inc.
Selected Capital Markets Transactions
  • Artisan Partners Asset Management Inc. in its $500.6 million and its $268.8 million synthetic secondary equity offerings
  • Bank of Butterfield in its $304 million SEC-registered follow-on offering of shares
  • First Republic Bank in numerous underwritten secondary equity offerings worth approximately $2.2 billion aggregate total since its $322.5 million IPO in 2011 and multiple subordinated notes and noncumulative perpetual preferred stock offerings worth $1.425 billion
  • IntercontinentalExchange Group, Inc. its $2.5 billion underwritten notes offering, in its $1.4 billion underwritten senior notes offering in connection with its $8.2 billion acquisition of NYSE Euronext and its $515.2 million underwritten secondary equity offering
  • NYSE Euronext in connection with its $750 million senior notes offering
  • Underwriters in connection with the $1.77 billion secondary equity offering by NYSE Group
  • Regions Financial Corporation in its $750 million offering of senior notes and related asset liability management transactions
  • Underwriters in connection with $16.0 billion SEC-registered offering of notes by Visa Inc.  
Selected M&A Transactions
  • Diebold in its combination with Wincor Nixdorf to form Diebold Nixdorf
  • Kraft in its merger with H.J. Heinz to form The Kraft Heinz Company
  • IntercontinentalExchange Group, Inc. in its acquisition of NYSE Euronext   
  • Praxair, Inc. in its $80 billion combination with Linde AG
  • Andeavor (formerly known as Tesoro Corporation) in its acquisition of Western Refining Inc.
  • Cheniere Energy, Inc. to acquire all of the outstanding shares of Cheniere Energy Partners LP Holdings, LLC (CQH)