Stephen Berenson brings an unusual combination of MIT mathematics training and 33 years at J.P. Morgan—including 12 years as vice chairman of investment banking—to his role as managing partner at Flagship Pioneering, where he applies Wall Street capital markets expertise to early-stage biotech company building. He leads Flagship's approach to large-scale corporate partnerships, exemplified by his role in structuring the collaboration with Samsung, and mirrors his investment philosophy through his MIT Berenson Mathematical Exploration Fund, which backs unconventional mathematical research that may seem unreasonable at the outset. Stephen Berenson brings an unusual combination of MIT mathematics training and 33 years at J.P. Morgan—including 12 years as vice chairman of investment banking—to his role as managing partner at Flagship Pioneering, where he applies Wall Street capital markets expertise to early-stage biotech company building. He leads Flagship's approach to large-scale corporate partnerships, exemplified by his role in structuring the collaboration with Samsung, and mirrors his investment philosophy through his MIT Berenson Mathematical Exploration Fund, which backs unconventional mathematical research that may seem unreasonable at the outset.