X0306 4 2018-12-11 0 0001682852 Moderna, Inc. MRNA 0001222012 AFEYAN NOUBAR 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 1 0 1 0 0001508051 Flagship Ventures Fund IV General Partner LLC 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 0 0 1 0 0001400240 Flagship Pioneering Inc. 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 0 0 1 0 0001642578 Flagship VentureLabs IV, LLC 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 0 0 1 0 0001503559 Flagship Ventures Fund IV, L.P. 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 0 0 1 0 0001590973 Flagship Ventures Fund IV-Rx, L.P. 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 0 0 1 0 0001255927 KANIA EDWIN M JR 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 0 0 1 0 Common Stock 2018-12-11 4 C 0 7292145 A 7292145 I By: Flagship Ventures Fund IV, LP Common Stock 2018-12-11 4 C 0 1823036 A 1823036 I By: Flagship Ventures Fund IV-Rx, LP Common Stock 2018-12-11 4 C 0 24782551 A 32074696 I By: Flagship Ventures Fund IV, LP Common Stock 2018-12-11 4 C 0 6195632 A 8018668 I By: Flagship Ventures Fund IV-Rx, LP Common Stock 2018-12-11 4 C 0 5713739 A 37788435 I By: Flagship Ventures Fund IV, LP Common Stock 2018-12-11 4 C 0 1428432 A 9447100 I By: Flagship Ventures Fund IV-Rx, LP Common Stock 2018-12-11 4 C 0 85989 A 37874424 I By: Flagship Ventures Fund IV, LP Common Stock 2018-12-11 4 C 0 21496 A 9468596 I By: Flagship Ventures Fund IV-Rx, LP Common Stock 11460435 I By: Flagship Venture Labs IV LLC Common Stock 3924 I By: Flagship Pioneering, Inc. Series A Preferred Stock 2018-12-11 4 C 0 7292145 D Common Stock 7292145 0 I By: Flagship Ventures Fund IV, LP Series A Preferred Stock 2018-12-11 4 C 0 1823036 D Common Stock 1823036 0 I By: Flagship Ventures Fund IV-Rx, LP Series B Preferred Stock 2018-12-11 4 C 0 24782551 D Common Stock 24782551 0 I By: Flagship Ventures Fund IV, LP Series B Preferred Stock 2018-12-11 4 C 0 6195632 D Common Stock 6195632 0 I By: Flagship Ventures Fund IV-Rx, LP Series C Preferred Stock 2018-12-11 4 C 0 5713739 D Common Stock 5713739 0 I By: Flagship Ventures Fund IV, LP Series C Preferred Stock 2018-12-11 4 C 0 1428432 D Common Stock 1428432 0 I By: Flagship Ventures Fund IV-Rx, LP Series D Preferred Stock 2018-12-11 4 C 0 85989 D Common Stock 85989 0 I By: Flagship Ventures Fund IV, LP Series D Preferred Stock 2018-12-11 4 C 0 21496 D Common Stock 21496 0 I By: Flagship Ventures Fund IV-Rx, LP Shares held by Flagship Ventures Fund IV, L.P. ("Flagship Fund IV"). Flagship Ventures Fund IV General Partner LLC ("Flagship Fund IV GP") is the general partner of Flagship Fund IV. Noubar B. Afeyan, Ph.D. and Edwin M. Kania, Jr. are the managers of Flagship Fund IV GP. While Mr. Kania is retired from Flagship Pioneering, Inc. ("Pioneering"), he continues to serve as a manager of Flagship Fund IV GP. Each of the reporting persons except for Flagship Fund IV disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein. Shares held by Flagship Ventures Fund IV-Rx, L.P. ("Flagship Fund IV-Rx"). Flagship Fund IV GP is the general partner of Flagship Fund IV-Rx. While Mr. Kania is retired from Pioneering he continues to serve as a manager of the Flagship Fund IV GP. Each of the reporting persons except for Flagship Fund IV-Rx disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein. Shares held by Flagship VentureLabs IV LLC ("VentureLabs IV"). Flagship Fund IV is a member of VentureLabs IV and also serves as its manager. Flagship Fund IV GP is the general partner of Flagship Fund IV. Noubar B. Afeyan, Ph.D. and Edwin M. Kania, Jr. are the managers of Flagship Fund IV GP. While Mr. Kania is retired from Pioneering he continues to serve as a manager of the Flagship Fund IV GP. Each of the reporting persons except for VentureLabs IV disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein. Securities held by Pioneering. Noubar B. Afeyan, Ph.D. is the CEO and a stockholder of Pioneering. Each of the reporting persons except for Pioneering disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein. The Series A Preferred Stock converted into shares of the Issuer's common stock, $0.0001 par value per share ("Common Stock") based on an applicable conversion ratio of 0.45576 upon the closing of the Issuer's initial public offering on December 11, 2018. The Series A Preferred Stock had no expiration date. The Series B Preferred Stock converted into Common Stock based on an applicable conversion ratio of 0.45457 upon the closing of the Issuer's initial public offering on December 11, 2018. The Series B Preferred Stock had no expiration date. The Series C Preferred Stock converted into Common Stock based on an applicable conversion ratio of 0.45853 upon the closing of the Issuer's initial public offering on December 11, 2018. The Series C Preferred Stock had no expiration date. The Series D Preferred Stock converted into Common Stock based on an applicable conversion ratio of 0.45854 upon the closing of the Issuer's initial public offering on December 11, 2018. The Series D Preferred Stock had no expiration date. Flagship Pioneering, Inc., By: /s/ Noubar B. Afeyan, Name: Noubar B. Afeyan, Ph.D., Title: Manager 2018-12-13 Flagship Ventures Fund IV General Partner LLC, By: /s/ Noubar B. Afeyan, Name: Noubar B. Afeyan, Ph.D., Title: Manager 2018-12-13 Flagship VentureLabs IV LLC, By: Flagship Ventures Fund IV, L.P., its manager, By: Flagship Ventures Fund IV General Partner LLC, its general partner, By: /s/ Noubar B. Afeyan, Name: Noubar B. Afeyan, Ph.D., Title: Manager 2018-12-13 Flagship Ventures Fund IV, L.P., By: Flagship Ventures Fund IV General Partner LLC, its general partner, By: /s/ Noubar B. Afeyan, Name: Noubar B. Afeyan, Ph.D., Title: Manager 2018-12-13 Flagship Ventures Fund IV-Rx, L.P., By: Flagship Ventures Fund IV General Partner LLC, its general partner, By: /s/ Noubar B. Afeyan, Name: Noubar B. Afeyan, Ph.D., Title: Manager 2018-12-13 /s/ Noubar B. Afeyan, Name: Noubar B. Afeyan 2018-12-13 /s/ Edwin M. Kania Jr., Edwin M. Kania Jr. 2018-12-13