Carl Feinberg is a serial entrepreneur, investor, and philanthropist. Carl is the Founder and Managing Partner of Karellen Capital LLC, and a Venture Partner at Stride Capital LLC. Mr. Feinberg was the Founder and CEO of Relational Architects International (RAI), an enterprise software vendor acquired by Broadcom whose products are part of the fabric of modern commerce. Feinberg also chaired Parker Infrastructure Partners, LLC, which brought iconic mega projects, like the Tappan Zee and Goethals Bridge replacements and the Port of Miami Tunnel, to fruition. Carl currently serves as a Board Observer for the orbital refueling firm Orbit Fab.

Carl is a Visiting scholar at NYU and a Designated Academic Colleague at Columbia University. Carl is also a member of the NYU President's Global Council, the NYU Arts and Science Board, and the NYU Langone Chairmans Circle, the Advisory Board of the Centre for the Study of Existential Risk (CSER) of the University of Cambridge, a former member of the Board of Trustees of the Institute for Advanced Study (IAS), and a current member of the KITP Director’s Advisory Cabinet, the McDonald Observatory of the University of Texas, and the Economic Club of NY.  

Carl endowed a pair of Professorships at the Institute for Advanced Study, one in theoretical physics and one establishing the Cross-Disciplinary Program in Innovation, whose current Director is Nima Arkani-Hamed. Carl also endowed a chair at the Kavli Institute for Theoretical Physics (KITP) at the University of California - Santa Barbara.

The Rees-Feinberg Chair at the University of Cambridge Center for the Study of Existential Risk was established in 2025, and the Feinberg Institute for Theoretical Physics is being inaugurated in 2026 at NYU.   

In addition, Carl supports research in the natural sciences at NYU, NYU Langone, Penn, Stanford, HUJI, the University of Texas - Austin, the Center for Study of Existential Risk at the University of Cambridge, and the International Centre for Theoretical Physics (ICTP) in Trieste, Italy. Carl received his BA from Penn and studied programming at NYU where he subsequently taught in the School of Continuing Education.