Called by Fortune America's leading advisor for the new CEO, Marc’s CEO clients are leaders of very large, high performing global companies.

Marc founded Feigen Advisors in 2007. The firm has grown to serve over time nearly 50 chief executives with a team of 14 professionals. The firm’s CEO clients outperform the S&P and have longer tenures – nearly twice as long – as their cohorts. Expert in the role of the CEO, Feigen Advisors provides decision-support to CEOs in the full range of their work: strategy and value creation, capital management, governance, investor relations, stakeholder loyalty, and leadership. In 2017, Shawn Tully profiled Marc’s work in a five-page article in Fortune Magazine.

In addition to founding Feigen Advisors, Marc conceived, and with his partner Anton Warendh, built Hercules Solutions LLC, an investor relations software platform, which they sold to ICE, owners of the New York and London Stock Exchanges, in 2021. In 1998, Marc founded Katzenbach Partners LLC, bringing together the anchor client, the strategy, and the team. After a successful growth trajectory, the firm sold to Booz & Company nine years later. Marc co-founded Cambridge in America, an organization that has raised over $1 billion for Cambridge and has been the organization’s executive Vice Chairman for 24 years. Marc conceived and created two CEO forums: the Bower Forum, McKinsey & Company’s training program for new CEOs (over 100 have been delivered) and Prium, a leading CEO roundtable (he sold his one third interest to McKinsey.

Marc is a Fellow and Visiting Lecturer at the Cambridge Judge Business School, where he teaches an elective course on the “Art and Science of the High Performing CEO.” (The most popular elective at the school.) Marc publishes frequently in The Harvard Business Review. His most recent article on co-CEOs has received wide recognition, including a podcast on Freakonomics. He has also written for HBR on governance, military history, and CEO retirement. Earlier in his career, Marc taught corporate governance at the Wharton Spencer Stuart Director’s Institute.

Marc is a member of the Council on Foreign Relations and an Honorary Fellow at St John’s College, Cambridge.

Marc has a BA with honors in History from the University of Pennsylvania, an M. Phil. in International Relations from Cambridge University, where he was a Thouron Fellow, and an MBA from The Harvard Business School. Previously, Marc was an Associate at McKinsey & Company, where he and a team of seven co-authored a best-selling business book on creating growth and performance. He lives in New York City with his wife and two daughters, and his best friend, Oatie.