On October 1, 2020, as previously announced, Jason Ryan resigned as the Chief Operating Officer and Treasurer of Magenta Therapeutics, Inc. Following Mr. Ryan's resignation, Cindy Driscoll, the company's Vice President, Finance, has assumed the responsibilities of principal accounting officer of the company on an interim basis. Ms. Driscoll, 55, has served as the Company's Vice President, Finance since June 2017. Prior to joining the company, Ms. Driscoll worked at Tokai Pharmaceuticals, Inc. (Tokai"), from June 2011 to June 2017, most recently as the vice president of finance from September 2014 to June 2017, where she oversaw all finance and administrative operations for the publicly-traded company, including supporting its 2014 initial public offering.