X0306 4 2021-02-17 0 0001538210 NexImmune, Inc. NEXI 0001843694 Carmer Scott C/O NEXIMMUNE, INC. 9119 GAITHER ROAD GAITHERSBURG MD 20877 1 1 0 0 President and CEO Common Stock 2021-02-17 4 C 0 7058 A 7058 D Series A Preferred Stock 2021-02-17 4 C 0 7058 D Common Stock 7058 0 D The shares of preferred stock automatically converted into common stock immediately upon completion of the Issuer's initial public offering on a 1-for-1 basis. The shares of preferred stock were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering. Not applicable. /s/ Ilse Johnson, Attorney-in-fact 2021-02-19