Stone Key Team

Stone Key believes that intellectual capital is critical to our success. It guides the development and powers the execution of each of our innovative and customized services, helping our clients strike the right balance between strategic imperatives and optimized capital management. Our team applies a combination of deep domain knowledge and long-standing industry relationships together with rigorous analysis and decades of transaction experience to every client situation.

Michael J. Urfirer Michael J. Urfirer – Stone Key Partners

Chairman and Chief Executive Officer

Michael is Chairman and Chief Executive Officer of Stone Key Group. Prior to founding Stone Key, Michael was a Vice Chairman of Investment Banking and Global Head of Strategic Advisory Banking at Bear, Stearns & Co. Inc. Continue reading

Sumit Laddha


Sumit is a Partner at Stone Key and focuses on advising the Firm's IT Services, Business Process Outsourcing, Consulting and Knowledge Process Outsourcing clients.  Prior to joining Stone Key, Sumit was an Executive Director and Head of the IT Services, Business Process Outsourcing and Consulting Services sectors within the Technology Services Investment Banking Group at J.P. Morgan. Continue reading

Allen L. Weingarten Allen L. Weingarten

General Counsel

Allen is General Counsel of Stone Key and also serves as the firm's Chief Compliance Officer. He has over 30 years of experience as a corporate and securities lawyer, with expertise in a wide variety of matters, including mergers and acquisitions; leveraged buyouts; venture capital; joint ventures; public offerings; private placements; and restructurings of public debt securities. Continue reading

Bryan M. Kang

Managing Director

Bryan joined Stone Key from J.P. Morgan, where he was a Vice President in the Diversified Industries Group focused on advising Multi-Industrial Conglomerates and select Aerospace & Defense clients.  Prior to joining J.P. Morgan, Bryan was part of Macquarie Capital’s Industrials practice. Continue reading