Louis Robert Guenthner
Sonnenschein Nath & Rosenthal LLP • Chicago, IL
Mergers AcquisitionsPersonal InjuryRestructuring
Is this your profile?
Claim it for free to update your information and connect with clients.
Contact
Email
Phone
(844) 467-5309
Address
233 East Wacker Drive, Chicago, IL, 60601, US
Professional
About
Louis Robert Guenthner is an experienced attorney with more than 25 years of practice advising clients on complex business and transactional matters. Based in Chicago, he is a member of Sonnenschein Nath & Rosenthal LLP, where he focuses his practice on mergers and acquisitions, corporate and incorporation matters, and health care law. His background gives him a broad perspective on the legal and strategic issues that can affect companies at every stage of growth, from formation and governance to expansion, restructuring, and sale. In his corporate practice, Mr. Guenthner works with businesses navigating sophisticated transactions and organizational matters, helping clients address legal risks while advancing their business objectives. His mergers and acquisitions work reflects a practical, detail-oriented approach designed to support efficient deal execution and thoughtful decision-making. In the health care sector, he advises clients in an industry shaped by regulatory complexity, operational demands, and ongoing change, providing guidance intended to help organizations move forward with confidence. Clients value Mr. Guenthner’s commitment to responsive service, clear communication, and commercially focused counsel. He approaches each matter with professionalism and attention to detail, aiming to deliver practical legal solutions tailored to client goals. Through his extensive experience and client-centered approach, he continues to serve as a trusted advisor to businesses and organizations seeking guidance in corporate, transactional, and health care-related matters.
About Mergers Acquisitions Law
M&A attorneys handle complex business transactions including mergers, acquisitions, and divestitures. They guide companies through due diligence and deal structuring. Common matters include mergers, acquisitions, due diligence, deal structuring.
Credentials
Education
1999 Washington University School of Law JD/MBA - Juris Doctorate and MBA 1992 University of Dayton BS - Bachelor of Science
Recognition & Involvement
Awards
2014 Super Lawyer Health Care, Super Lawyers 2013 Up and Coming Healthcare Lawyer, Chambers USA 2010 Outstanding Healthcare Transaction Lawyer, Nightingale's Healthcare News 2004 Outstanding Young Healthcare Lawyers, Nightingale's Healthcare News
Publications
2006 Unknown Pennsylvania Court Rules on Standing to Challenge Action of Bartol Institute 2004 Unknown "Internal Revenue Services Issues Proposed Regulations to Exclude Medical Residents from Student FICA Tax Exemptions 2002 E-Health Business and Transactional Law, BNA Books Due Diligence 1999 Washington University Journal of Law and Policy Who is the Victim Here: Vicarious Sexual Harassment After Liebovitz v New York City Transit Authority
Associations
American Health Lawyers Association Member American Bar Association Member Chicago Bar Association Member
Other Mergers Acquisitions Attorneys in Chicago, IL
More Attorneys at Sonnenschein Nath & Rosenthal LLP
Updated: Jul 13, 2026