Michael M. B. Hoffman

Chairman of the Board

Mr. Hoffman is a Partner of Riverstone Holdings LLC, where he is principally responsible for investments in power and renewable energy. Riverstone has committed approximately $28 billion to 113 investments in North America, Latin America, Europe, Africa and Asia. Mr. Hoffman is co-head of Riverstone’s Renewable Energy Funds Iand II.

Before joining Riverstone in 2003, Mr. Hoffman was senior managing director and head of the mergers and acquisitions advisory business of The Blackstone Group for fifteen years, where he also served on the firm’s principal group investment committee as well as its executive committee.

Mr. Hoffman serves on several private and public Company Boards including Pattern Energy and the newly created Talen Energy.

Mr. Hoffman is also the chairman of Onconova Therapeutics, Inc.Onconova is finishing both Phase II and Phase Ill trials for its lead compound which has activity in both solid and liquid tumors. He is also Founder and Chairman of Tera Immuno-Oncology, which is developing Chimeric Antigen Receptor (CAR-T) constructs for both hematological and solid tumors.

He is on the Board of Trustees of The Rockefeller University and is a member of their Tech Transfer Committee. He has also funded their Tri-lnstitutional Therapeutic Discovery Institute which is a collaboration between Rockefeller, Cornell-Weill and Memorial Sloan Kettering.

He is on the Board of Trustees of The Rockefeller University and is a member of their Tech Transfer Committee. He has also funded their Tri-lnstitutional Therapeutic Discovery Institute which is a collaboration between Rockefeller, Cornell-Weill and Memorial Sloan Kettering.