PDF Solutions, Inc. announced that on June 15, 2021, Gerald Z. Yin, Ph.D. notified the Company that he has withdrawn his nomination for re-election to the Company’s Board of Directors at the Annual Meeting of Stockholders to be held at 3:00 p.m. Pacific time on June 15, 2021. Dr. Yin also submitted his resignation as a director of the Company effective as of the Annual Meeting. As a result, Dr. Yin will be removed from the slate of candidates for Class II directors to be voted upon at the Annual Meeting, and any votes previously submitted for his re-election will be disregarded.