X0306 4 2015-10-13 0 0001557746 Aclaris Therapeutics, Inc. ACRS 0001524064 Sofinnova Venture Partners VIII, L.P. SOFINNOVA VENTURES, 3000 SAND HILL ROAD, 4-250 MENLO PARK CA 94025 0 0 1 0 0001559565 Sofinnova Management VIII, L.L.C. SOFINNOVA VENTURES, 3000 SAND HILL ROAD, 4-250 MENLO PARK CA 94025 0 0 1 0 0001245624 HEALY JAMES SOFINNOVA VENTURES, 3000 SAND HILL ROAD, 4-250 MENLO PARK CA 94025 0 0 1 0 0001253170 AKKARAJU SRINIVAS SOFINNOVA VENTURES, 3000 SAND HILL ROAD, 4-250 MENLO PARK CA 94025 0 0 1 0 0001202793 POWELL MICHAEL SOFINNOVA VENTURES, 3000 SAND HILL ROAD, 4-250 MENLO PARK CA 94025 0 0 1 0 Common Stock 2015-10-13 4 C 0 1880390 A 1880390 D Common Stock 2015-10-13 4 P 0 409090 11.00 A 2289480 D Series A Preferred Stock 2015-10-13 4 C 0 2000000 0.00 D Common Stock 579710 0 D Series B Preferred Stock 2015-10-13 4 C 0 2424242 0.00 D Common Stock 702678 0 D Series C Preferred Stock 2015-10-13 4 C 0 2063107 0.00 D Common Stock 598002 0 D The total represents shares received upon conversion of shares of Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock. Effective upon the closing of the issuer's initial public offering of its common stock, each share of preferred stock automatically converted into 0.289855 shares of common stock. The preferred stock had no expiration date. The shares are held of record by Sofinnova Venture Partners VIII, L.P. ("SVP VIII"). Sofinnova Management VIII, L.L.C. ("SM VIII") is the general partner of SVP VIII. The individual managing members of SVP VIII are Michael Powell, James Healy, Srinivas Akkaraju and Anand Mehra, and they may be deemed to share voting and dispositive power over the shares held by SVP VIII. Such persons and entities disclaim beneficial ownership over the shares held by SVP VIII except to the extent of any pecuniary interest therein. /s/ Nathalie Auber, Attorney-in-Fact for Sofinnova Venture Partners VIII, L.P. 2015-10-13 /s/ Nathalie Auber, Attorney-in-Fact for Sofinnova Management VIII, L.L.C. 2015-10-13 /s/ Nathalie Auber, Attorney-in-Fact for James Healy 2015-10-13 /s/ Nathalie Auber, Attorney-in-Fact for Srinivas Akkaraju 2015-10-13 /s/ Nathalie Auber, Attorney-in-Fact for Michael Powell 2015-10-13