X0306 4 2019-01-31 0 0001650664 Editas Medicine, Inc. EDIT 0001742806 Myer Vickesh C/O EDITAS MEDICINE, INC. 11 HURLEY ST. CAMBRIDGE MA 02141 0 1 0 0 Chief Technology Officer Restricted Stock Units 2019-01-31 4 A 0 16722 0 A Common Stock 16722 16722 D Each restricted stock unit represents the right to receive one share of common stock of Editas Medicine, Inc. The restricted stock unit award is scheduled to vest in its entirety on January 31, 2020, subject to acceleration in specified circumstances. Vested shares will be delivered to the Reporting Person on January 31, 2020. /s/ Vickesh Myer 2019-02-04