United-Guardian, Inc. announced that on May 26, 2020, Robert S. Rubinger, a member of the Registrant’s Board of Directors (“Board”), notified the registrant that he was resigning as a director of the registrant, effective immediately. Mr. Rubinger’s resignation was based on personal reasons, and was not the result of any dispute or disagreement with the Company or the Board on any matter relating to the operations, policies or practices of the Company.