X0206 3 2021-02-11 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 Series A Preferred Stock Common Stock 7058 D Stock Option (right to buy) 4.31 2029-07-17 Common Stock 54445 D Stock Option (right to buy) 4.31 2029-03-18 Common Stock 59640 D Stock Option (right to buy) 2.58 2028-07-30 Common Stock 214735 D Stock Option (right to buy) 2.42 2027-03-02 Common Stock 31586 D Stock Option (right to buy) 2.42 2027-03-02 Common Stock 94758 D Stock Option (right to buy) 2.58 2028-09-24 Common Stock 8917 D The shares of preferred stock will automatically convert 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. The shares of preferred stock will automatically convert into the Issuer's common stock on a 1-for-1 basis immediately upon completion of the Issuer's initial public offering. This option vests as to 25% of the shares on June 18,2020 with the remainder vesting in equal installments every month thereafter, beginning on June 18,2020 and ending on June 18, 2023. All shares underlying this option have vested. Exhibit 24.1 /s/ Ilse Johnson, Attorney-in-fact 2021-02-11