On August 2, 2021, Keros Therapeutics, Inc. announced that Simon Cooper, M.B.B.S., has been appointed to serve as the Company’s Chief Medical Officer, effective as of August 2, 2021. Dr. Cooper is succeeding Claudia Ordonez, M.D., who departed from the Chief Medical Officer position effective July 30, 2021 (the “Separation Date”). Dr. Ordonez will provide consulting services to the Company until September 15, 2021. As consideration for these consulting services, the Company will pay Dr. Ordonez a fixed fee of $5,000 and agreed to amend the outstanding stock option award agreements granted to her under the Company’s 2017 Stock Incentive Plan, as amended, and the Company's 2020 Equity Incentive Plan, as applicable, to extend the post-termination exercise period to six months for those options that would otherwise expire three months after the Separation Date. Dr. Cooper, age 52, is joining the Company after most recently serving as the Senior Vice President, Chief Medical Officer of Kadmon Holdings, Inc.