Aclaris Therapeutics Inc (ACRS): RA Capital Management Disposes of 1.1 Million Shares

Page 7 of 8 – SEC Filing

CUSIP No. 00461U105

Item 8. Identification and Classification
of Members of the Group:

Not applicable.

Item 9. Notice of Dissolution of
Group:

Not applicable.

Item 10. Certification:

By signing below I hereby certify that,
to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of
or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held
in connection with or as a participant in any transaction having that purpose or effect.

Exhibits

1

Joint Filing Agreement by and among the Reporting Persons is incorporated herein by reference to Exhibit 1 to the Schedule 13G filed by the Reporting Persons with the Securities and Exchange Commission on October 13, 2015.