Exhibit 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
I, Arthur O. Tzianabos, Ph.D., President and Chief Executive Officer of Homology Medicines, Inc. (the “Company”) hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:
| (1) | The Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019 (the “Report”) fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and |
| (2) | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. |
Date: March 12, 2020 |
| By: | /s/ Arthur O. Tzianabos, Ph.D. |
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| Arthur O. Tzianabos, Ph.D. |
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| President and Chief Executive Officer (Principal Executive Officer) |