PDF Solutions, Inc. announced that on July 31, 2018, Gregory C. Walker announced his plan to retire from his positions of Vice President, Finance and Chief Financial Officer of the Company effective after the Company files its Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2018 with the SEC. Mr. Walker will continue in an operations role. The Board of Directors appointed Christine Russell as Mr. Walker's replacement for the position of Chief Financial Officer effective upon Mr. Walker's retirement.

Ms. Russell is currently VP, Finance with the Company, having joined in July 2018. Ms. Russell is 68 years old and brings over 25 years of corporate and financial experience to PDF Solutions. Prior to joining the Company, Ms. Russell served as Chief Financial Officer, UniPixel, Inc., a touch sensor company, from May 2015 to August 2017.

Prior to UniPixel, she was Chief Financial Officer of Vendavo, Inc. from May 2014 to March 2015.