X0206 3 2021-02-11 0 0001538210 NexImmune, Inc. NEXI 0001247015 BARER SOL J C/O NEXIMMUNE, INC. 9119 GAITHER ROAD GAITHERSBURG MD 20877 1 0 0 0 Common Stock 567632 D Common Stock 129007 I Held by Joshua Barer Stock Option (right to buy) 5.17 2030-03-04 Common Stock 205900 D Series A Preferred Stock Common Stock 800182 D Series A Preferred Stock Common Stock 894036 I Held B&S NexImmune Holdco LLC Series A2 Preferred Stock Common Stock 164408 I Held by B&S NexImmune Holdco LLC Series A3 Preferred Stock Common Stock 82204 I Held by B&S NexImmune Holdco LLC Convertible Promissory Note Common Stock 336682 I Held by B&S NexImmune Holdco LLC Series A Preferred Stock Common Stock 217570 I Held by Joshua Barer Mr. Barer is the father of Joshua Barer. Mr. Sol Barer disclaims beneficial ownership of the securities held by Joshua Barer except to the extent of his pecuniary interest therein. All shares underlying this option will automatically fully vest immediately upon completion of the Issuer's initial public offering. 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. Mr. Barer is the father of Joshua Barer, who is the sole manager of B&S NexImmune Holdco LLC and has sole voting and dispositive control over the shares held by B&S NexImmune Holdco LLC. Mr. Sol Barer is also a member of Barer & Son Capital, LLC, which is a member of B&S NexImmune Holdco LLC, but he does not have voting or dispositive control over the shares held by B&S NexImmune Holdco LLC. Mr. Sol Barer disclaims beneficial ownership of the securities held by B&S NexImmune Holdco LLC except to the extent of his pecuniary interest therein. These shares will automatically convert into the Issuer's common stock immediately upon completion of the Issuer's initial public offering. These shares 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. Exhibit 24.1 - Power of Attorney /s/ Ilse Johnson, Attorney-in-fact 2021-02-11