Christopher B. Ehrlich - 25 Aug 2021 Form 4 Insider Report for eFFECTOR Therapeutics, Inc.

Footnote F1

Represents shares held directly by the Sponsor, of which Locust Walk Partners LLC ("LWP") is a member. LWP has allocated these shares to the reporting person.

Footnote F2

Represents shares held directly by the Sponsor, of which LWP is a member. LWP has allocated these shares to the reporting person's spouse.

Footnote F3

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 and such shares of Class A Common Stock were automatically reclassified in shares of common stock.

Footnote F4

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.

Footnote F5

As a former principal of the manager of the Sponsor, the reporting person previously reported all securities held by the Sponsor. As of the date hereof, the reporting person is no longer a principal of the entity with control over the securities held by the Sponsor, accordingly, this report only includes securities to the extent of the reporting person's and his spouse's pecuniary interest therein.