About

Marc William O’Brien is an attorney with experience in business law, corporate and incorporation matters, and financial markets and services. Based in Chicago, he serves clients from the firm of Bronson & Kahn LLC Attorneys At Law | Much Shelist, P.C., where he brings a practical, business-focused perspective to complex legal issues. His work is centered on helping businesses navigate formation, governance, transactions, and regulatory concerns with clarity and confidence. Known for his professional and measured approach, Mr. O’Brien works to understand each client’s objectives and tailor legal guidance to the needs of the matter at hand. Whether assisting emerging companies, established businesses, or clients operating in regulated financial sectors, he focuses on providing strategic counsel that supports long-term stability and informed decision-making. His background in corporate and financial matters allows him to address a wide range of legal challenges with attention to detail and an eye toward practical outcomes. Mr. O’Brien is committed to delivering responsive, thoughtful representation that helps clients move forward efficiently. From his office at 150 North Wacker Drive in Chicago, he serves businesses seeking experienced guidance in today’s evolving legal and commercial environment.

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