X0306 4 2023-02-07 0 0001374690 Larimar Therapeutics, Inc. LRMR 0001965014 Shankar Gopi C/O LARIMAR THERAPEUTICS, INC. THREE BALA PLAZA EAST, SUITE 506 BALA CYNWYD PA 19004 0 1 0 0 Chief Development Officer Stock Option (Right to Buy) 5.88 2023-02-07 4 A 0 180000 0.00 A 2033-02-07 Common Stock 180000 180000 D The option vests 25% on February 7, 2024, with the remaining 75% vesting in equal monthly installments on the last day of each of the 36 calendar months immediately following such date, subject to the Reporting Person's continued service with the Issuer through the applicable vesting date. By: /s/ Jennifer Johansson, Attorney-in-fact 2023-02-09