On April 19, 2023, the Board of Directors of Energy Recovery, Inc. accepted the previously tendered resignations of Board members, Mr. Sherif Foda and Ms. Lisa Pollina, effective upon the completion of their respective term, which ends at their 2023 Annual Meeting. Both Mr. Foda and Ms. Pollina has notified the Board that their respective decision to not seek re-election is not based on any disagreement with the Company.