X0306 4 2021-08-25 0 0001828522 eFFECTOR Therapeutics, Inc. EFTR 0001748622 Bhatt Elizabeth EFFECTOR THERAPEUTICS, INC. 11120 ROSELLE ST SUITE A SAN DIEGO CA 92121 1 0 0 0 Class A Common Stock 2021-08-25 4 C 0 9047 0.00 A 9047 I By LWAC D&O LLC Class B Common Stock 2021-08-25 4 D 0 8453 0.00 D Common Stock 8453 8453 I By LWAC D&O LLC Class B Common Stock 2021-08-25 4 C 0 9047 D Common Stock 9047 0 I By LWAC D&O LLC On August 25, 2021, pursuant to that certain Agreement and Plan of Merger, dated as of May 26, 2021 (the "Merger Agreement"), by and among the Issuer (f/k/a Locust Walk Acquisition Corp.), Locust Walk Merger Sub, Inc. ("Merger Sub"), and eFFECTOR Therapeutics, Inc. ("Old eFFECTOR"), Merger Sub merged with and into Old eFFECTOR with Old eFFECTOR surviving as a wholly owned subsidiary of the Issuer (the "Merger"). In connection with and upon consummation of the Merger, each of the Issuer's outstanding shares of Class B Common Stock automatically converted into one share of Class A Common Stock. Represents shares held directly by the Sponsor, of which LWAC D&O LLC is a member. Pursuant to an agreement by and between the Issuer and Locust Walk Sponsor, LLC (the "Sponsor"), concurrent with the consummation of the Merger, these shares of Class B Common Stock were forfeited to the Issuer immediately prior to the Merger. /s/ Michael Byrnes, Attorney-in-Fact for Elizabeth Bhatt 2021-08-25