On January 3, 2019, Calyxt, Inc. announced the appointment of William Koschak as Chief Financial Officer of the Company, effective as of January 7, 2019. As Chief Financial Officer, Mr. Koschak serves as the Company's principal financial officer and principal accounting officer. Mr. Koschak previously served as the Vice President, Finance of the Brain Therapies division of Medtronic plc, from June 2017 through January 2019.

During this time, Mr. Koschak also served as interim Vice President and General Manager, Brain Modulation at Medtronic plc from May 2018 through October 2018. Prior to joining Medtronic plc, Mr. Koschak served as the Executive Vice President and Chief Financial Officer of Young America Holdings, LLC, beginning in December 2014. Earlier in his career, Mr. Koschak held various finance positions at General Mills, where he was employed from May 2005 until December 2014.

Prior to General Mills, Mr. Koschak was an audit partner at KPMG LLP. In connection with the appointment of Mr. Koschak as Chief Financial Officer of Calyxt, Eric Dutang will resign as Calyxt's interim Chief Financial Officer effective January 7, 2019. Mr. Dutang remains the Chief Financial Officer of Cellectis S.A., which is the majority shareholder of the Company.