Gilbert E. Nathan
Chair of the Board
Gilbert Nathan has served as an Advisor to the Board since November 2015 and as a director since November 2019. Mr. Nathan is the Managing Member of Jackson Square Advisors LLC, and is the Chief Executive Officer of Keycon Power Holdings, LLC. Mr. Nathan serves on the Board of Directors of two additional publicly traded companies, Ready Capital Corporation and Magnachip Semiconductor Corporation. He previously served on the Boards of Directors of Owens Realty Mortgage, Inc. and Emergent Capital, Inc., and as a liquidating trust board member of Hercules Offshore Liquidating Trust. Mr. Nathan was formerly a Senior Analyst with Candlewood Investment Group, an investment firm with significant debt and equity investments in the ethanol industry. Prior to joining Candlewood, Mr. Nathan served as Principal at Restoration Capital Management for 10 years. Mr. Nathan has a B.S. degree in Management, Major in Finance from the A. B. Freeman School of Business at Tulane University.
Dianne S. Nury
Vice Chair of the Board
Dianne Nury has served as an Advisor to our Board since August 2018 and as a Director since November 2019. Ms. Nury is President and Chief Executive Officer of Vie-Del Company. Ms. Nury serves on the Board of Directors of the Wine Institute and is a former Chairman of the Board. Ms. Nury is a member of the Juice Products Association, and formerly served as Chairman of its Board of Directors. She is a member of the Board of Directors of the Agricultural Foundation for California State University at Fresno and serves as the Vice Chairman of the Viticulture and Enology Industry Advisory Board. Ms. Nury previously served on the USDA Fruit and Vegetable Industry Advisory Committee. Ms. Nury is a Board Member of the Foundation for Clovis Schools, Clovis, California, and previously served on the Board of Trustees of the Saint Agnes Medical Center, Fresno, California. Ms. Nury has a BS degree in Business from California State University at Fresno.
Maria G. Gray
Director
Maria Gray has served as an advisor to our Board since 2021 and as a Director since June 2022. Ms. Gray served as a Senior Refining Engineer at Marathon Petroleum Company, an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. From 2012 to 2021, Ms. Gray served in several capacities including as a Senior Health, Safety, and Environmental Professional and as a Project Process Engineering Lead, at Marathon Petroleum Company. Ms. Gray also served in various engineering and supervisory capacities from 2001 to 2012 for Motiva Enterprises LLC, then a joint venture between Shell Oil Company and Saudi Refining Inc, a subsidiary of Saudi Aramco, that operates North America’s largest refinery in Port Arthur, Texas, producing and distributing fuels and specialty chemicals. Ms. Gray also served as a Process Engineer for Union Carbide Corporation, a wholly-owned subsidiary of Dow Chemical Company, that produces specialty chemicals and polymers. Ms. Gray has a B.S. degree in Chemical Engineering, Minor in Business and Minor in Architecture from Tulane University.
Alan R. Tank
Director
Alan Tank brings more than three decades of executive leadership and board experience across the agriculture, food, and renewable energy sectors. Since 2024, Mr. Tank has served as an advisor to Mercator Partners, an asset management platform that invests in decarbonization opportunities. Since 2022, he has served as an advisor to Eion Corp, a carbon capture and removal company. Since 2017, he has served as an executive advisor to Blue Sea Capital, a private equity firm focusing on the industrial growth, aerospace and healthcare sectors. Since 2015, he has co-owned and managed Tank Brothers Farm/Tank Customs, his family farm in eastern Iowa, as its managing member. Until 2016, Mr. Tank served as chief executive officer and managing partner of Revolution Energy Solutions, a company he co-founded in 2006 that developed, owned and operated renewable energy/waste-to-energy projects on agricultural platforms in the US. In 2001, Mr. Tank also founded AgCert International, a world leader in the production and sale of agriculturally derived greenhouse gas emission reductions used to satisfy the Kyoto Protocol and European Union Emission Trading Scheme requirements and served as its chief executive officer until 2005. He serves on the board to WestMET Group and Victory Hemp Foods. Mr. Tank holds a B.S. in Animal Science, from Iowa State University.
Bryon T. McGregor
President, Chief Executive Officer, and Director
Bryon McGregor has served the company for over 17 years. Named CEO in 2023, Mr. McGregor joined Alto Ingredients in 2008 as Vice President Finance/Treasurer and later appointed Chief Financial Officer in 2009. During his tenure as CFO, McGregor has led multiple financings, integrated acquisitions, strengthened the company’s balance sheet and implemented cost reduction programs. He served as Brokerage Treasurer for E*TRADE Financial, overseeing Europe and Asian treasury operations, where his responsibilities included international and U.S. brokerage treasury operations, corporate finance, and investor relations. Prior to that, as Manager, Global Head of Project Finance at BP (formerly ARCO, one of the top 10 fully integrated multi-national oil and gas companies in the world at that time), Mr. McGregor was responsible for the development of and managing investments in global industrial and infrastructure projects, including a multi-billion dollar LNG project in Indonesia, a $3 billion heavy-oil project in Venezuela, over $1 billion in regasification and natural gas pipeline projects, and over a $1 billion in various other energy and chemical investments located both domestically and internationally. When at Credit Suisse, he developed limited-recourse financing opportunities globally in excess of $8 billion in energy, petrochemical, mining, infrastructure, telecommunications, as well as facilitated M&A for clients. McGregor has a BS degree in Business Management from Brigham Young University.