"Paul Theiss earns plaudits for his knowledge of 'anything to do with capital markets or corporate development - buying, selling, financing.'"
Chambers USA


Paul Theiss is a partner of Mayer Brown. He is the former chairman of the firm, served on the firm’s Management Committee since 2009 and previously served as a co-leader of the firm’s global Corporate & Securities practice. He joined Mayer Brown in 1985.

Paul practices corporate law focusing on a broad spectrum of mergers and acquisitions and capital markets work. He advises clients on both public and private mergers and acquisitions, and serves as general outside counsel to numerous companies as they develop and expand their growing businesses, advising on matters ranging from corporate governance to regulatory filings with the Securities and Exchange Commission.

Widely recognized as one of the leading corporate lawyers in the United States by Chambers USA for nine of the past ten years, the 2012 edition noted that “sources describe him as ‘a very high-quality lawyer.’” The 2010 edition noted, "'Some guys can do it all...Paul is definitely one of those guys.' His practice is a mix of M&A and capital markets work.” The 2009 edition noted that “Paul Theiss also draws praise for his assured negotiation skills and ability to ‘get a deal done with a minimum of fuss,’” and the 2008 edition noted that "Paul Theiss earns plaudits for his knowledge of 'anything to do with capital markets or corporate development - buying, selling, financing.'" Paul is also recognized in other leading publications including Leading Lawyers Network and IFLR.

Paul’s experience includes: 

Mergers and Acquisitions. Counseling buyers, sellers and financial intermediaries in connection with public and private acquisitions, joint ventures, divestitures, mergers, tender offers and proxy contests in the United States and worldwide.

Capital Markets. Representing issuers and underwriters in connection with public and Rule 144A offerings of debt, equity, convertible and hybrid securities; advising on liability management transactions, including equity and debt self-tenders, exchange offers and consent solicitations.

General Corporate Practice. Advising companies regarding Securities Act and Exchange Act compliance, NYSE and NASDAQ compliance, corporate governance and Sarbanes-Oxley Act matters. 

Industry Experience. Deep understanding and experience with a variety of industries, including telecommunications, insurance, investment management, consumer products, metals recycling, packaging, gaming and hotels and lodging.

Spoken Languages

  • English


The University of Chicago Law School, JD

Amherst College, BA


  • Illinois