Exhibit 99.1 Mr. Bircher will report to Chief Executive Officer Theresa Heggie as part of the executive leadership team. He will bring to Freeline his deep experience leading manufacturing site teams through successful regulatory inspections conducted by the US Food and Drug Administration ("FDA"), including the Center for Biologics Evaluation and Research ("CBER"), the Center for Drug Evaluation and Research ("CDER"), the European Medicines Agency ("EMA") and other regulatory agencies. "Jay's deep knowledg ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the transition period from to OR ☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF ...