X0306 4 2020-06-11 0 0001367920 CONCERT PHARMACEUTICALS, INC. CNCE 0001185039 ALDRICH RICHARD C/O CONCERT PHARMACEUTICALS, INC. 65 HAYDEN AVENUE, SUITE 3000N LEXINGTON MA 02421 1 0 0 0 Stock Option (right to buy) 9.16 2020-06-11 4 A 0 10000 0.00 A 2030-06-10 Common Stock 10000 10000 D Stock Option (right to buy) 9.16 2020-06-11 4 A 0 13260 0.00 A 2030-06-10 Common Stock 13260 13260 D The shares underlying this option vest in equal quarterly installments over a one-year period through June 11, 2021, provided that such option shall vest in full on the date that is one business day prior to the date of the Issuer's next annual meeting of stockholders (if earlier than June 11, 2021). This option was granted to the director based on such director's election to receive annual cash compensation in the form of a stock option. /s/ Roger D. Tung, attorney-in-fact 2020-06-12