X0508 4 2026-02-02 0001557746 Aclaris Therapeutics, Inc. ACRS 0002045027 Davis Hugh M. C/O ACLARIS THERAPEUTICS, INC. 701 LEE ROAD, SUITE 103 WAYNE PA 19087 true true false false President and COO 0 Restricted Stock Units 2026-02-02 4 A 0 96100 0 A Common Stock 96100 96100 D Employee Stock Option (Right to Buy) 3.61 2026-02-02 4 A 0 336300 0 A 2036-02-01 Common Stock 336300 336300 D Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer. The shares underlying these restricted stock units vest in four equal installments on the first, second, third and fourth anniversaries of February 2, 2026, subject to the Continuous Service (as defined in the Plan) of the Reporting Person as of each such date. Exercisable with respect to 25% of the shares subject to the option vesting in four equal installments on the first, second, third and fourth anniversaries of February 2, 2026, subject to the Continuous Service (as defined in the Plan) of the Reporting Person as of each such date. /s/ Matthew Rothman, Attorney-in-Fact 2026-02-06