Michael E. Seifert has resigned as Resonant Inc.'s Chief Financial Officer and Secretary effective September 21, 2018. Jeff A. Killian, who served as Chief Financial Officer from October 2016 until Mr. Seifert's appointment on September 4, 2018, has been appointed as its Interim Chief Financial Officer (principal financial and accounting officer) and Secretary while the company search for a permanent replacement for Mr. Seifert.