On February 25, 2022, Carolyn Romero, the Chief Accounting Officer and Principal Accounting Officer of Gevo, Inc. communicated to the Company her intention to retire from the Company as of the close of business on March 4, 2022. Ms. Romero's retirement is not a result of any disagreement with the Company's independent auditors or any member of management on any matter of accounting principles or practices, financial statement disclosure or internal controls.