Mike Hermsen has an extensive practice that focuses on securities matters. He represents issuers, investment banking firms and security holders in connection with issuances of equity and debt securities. Mike also represents corporate clients in connection with compliance and reporting matters and counsels companies, boards of directors and management on stock purchases, liability management, executive compensation reporting and corporate governance matters.

Before Mike joined Mayer Brown in 1994, he had extensive senior administrative experience with the US Securities and Exchange Commission in Washington, DC. In the SEC's Division of Corporation Finance he served as Assistant Director (1992-1994), Special Counsel (1990-1992) and Attorney/Advisor (1986-1990). He also has accounting and audit experience with a then-Fortune 500 manufacturing corporation.

Mike has been included in The Best Lawyers in America in the practice areas of Securities/Capital Markets Law and Securities Regulation for over a decade and Legal 500  recommends Mike in "Capital Markets - Equity Offerings," noting Mike has "unsurpassed knowledge of SEC rules."  In addition, Mike is frequently cited in the media regarding new regulatory initiatives.

Spoken Languages

  • English


University of Wisconsin Law School, JD

Marquette University, MBA

Marquette University, BS


  • Illinois
  • Wisconsin


  • American Bar Association, Business Law Section
  • Illinois State Bar Association, Section of Corporations, Securities and Business Laws
  • State Bar Association of Wisconsin
  • Chicago Bar Association