Alexander Hap Ellis III, commonly known as Hap Ellis, serves as a General Partner and Founding Partner at RockPort. See sector focus and contact routes.
Alexander Hap Ellis III, commonly known as Hap Ellis, serves as a General Partner and Founding Partner at RockPort Capital Partners, a Boston-based venture firm where he has been active since 1998. He focuses his investment thesis on decarbonizing strategies within electric power and natural gas/hydrogen sectors, leveraging extensive operating experience in renewable energy and electric power generation. The firm operates as a multi-stage investor specializing in alternative and traditional energy, mobility, and sustainability, though specific check sizes and lead/follow behavior for Ellis individually are not publicly detailed. Notable portfolio companies linked to his specific focus include Abnaki Group, which addresses electric power decarbonization, and New Energy Development Co., LLC, focused on natural gas and hydrogen technologies. Ellis previously expanded wind generation portfolios at Kenetech Corporation and developed major gas-fired generating stations at Casco Bay Energy and Acadia Bay Energy before joining RockPort. While he holds a BA from Colorado College and an MBA from Yale, there is no publicly available record of distinctive public writing
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