X0206 3 2021-02-11 0 0001538210 NexImmune, Inc. NEXI 0001843849 Jones Kristi C/O NEXIMMUNE, INC. 9119 GAITHER ROAD GAITHERSBURG MD 20877 0 1 0 0 Chief Operating Officer Common Stock 47429 D Series A Preferred Stock Common Stock 14738 D Stock Option (right to buy) 2.42 2027-03-02 Common Stock 15743 D Stock Option (right to buy) 2.58 2028-09-24 Common Stock 3715 D Stock Option (right to buy) 4.31 2029-03-18 Common Stock 24499 D Stock Option (right to buy) 2.58 2028-07-30 Common Stock 88156 D Stock Option (right to buy) 4.31 2029-06-17 Common Stock 18824 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. All shares underlying this option have vested. 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. Exhibit 24.1 /s/ Ilse Johnson, Attorney-in-fact 2021-02-11