Ann Reis was appointed Chief Financial Officer in January 2026, responsible for overseeing the company’s financial strategy, accounting, and operations. Prior to joining Green Plains, Ms. Reis served as CFO and Chief Accounting Officer at Southwest Iowa Renewable Energy (SIRE). She has over 20 years of experience in finance and operations, primarily within the agribusiness and energy sectors.
Before her tenure at SIRE, Ms. Reis held leadership roles at ConAgra Foods and Lincoln Financial Group. She holds a Master of Science in Accounting from the University of Toledo and a Bachelor of Arts from the University of Nebraska-Lincoln.