On March 20, 2019, Smart Sand, Inc. received a letter of resignation from Tracy Robinson indicating that she will be resigning, effective June 15, 2019, from her position on the Board of Directors of the Company, and from each of the Audit Committee of the Board, the Compensation Committee of the Board and the Nominating and Corporate Governance Committee of the Board. Ms. Robinson's resignation is not due to any disagreement with the Company's operations, policies or procedures.