Exhibit 4.1

 


	

    	
SPECIMEN   SPECIMEN NUMBER SEE REVERSE FOR CERTAIN DEFINITIONS INCORPORATED UNDER THE   LAWS OF THE STATE OF DELAWARE CoMMonsToCK This CerTifies ThaT: SPECIMEN is   The owner of FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, PAR   VALUE $.00001 EACH OF aClaris TherapeuTiCs, inC. transferable on the books of   the Corporation in person or by attorney upon surrender of this certificate   duly endorsed or assigned. This certificate and the shares represented hereby   are subject to the laws of the State of Delaware, and to the Certificate of   Incorporation and Bylaws of the Corporation, as now or hereafter amended.   This certificate is not valid until countersigned by the Transfer Agent.   WITNESS the facsimile seal of the Corporation and the facsimile signatures of   its duly authorized officers. COUNTERSIGNED: BROADRIDGE CORPORATE ISSUER   SOLUTIONS, INC. 1717 ARCH ST., STE. 1300, PHILADELPHIA, PA 19103 TRANSFER   AGENT DATED: BY: AUTHORIZED SIGNATURE SECRETARY PRESIDENT CUSIP 00461U 10 5   SHARES
    




 






 


	

    	
The following   abbreviations, when used in the inscription on the face of this certificate,   shall be construed as though they were written out in full according to   applicable laws or regulations: TEN COM - as tenants in common TEN ENT - as   tenants by the entireties UNIF GIFT MIN ACT -   ....................Custodian.................... (Cust) (Minor) JT TEN - as   joint tenants with right of survivorship and not as tenants in common under   Uniform Gifts to Minors Act ...................................................   (State) Additional abbreviations may also be used though not in the above   list. For Value Received, hereby sell, assign and transfer unto PLEASE INSERT   SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE (PLEASE PRINT OR TYPE   NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) Shares of the stock   represented by the within Certificate, and do hereby irrevocably constitute   and appoint Attorney to transfer the said stock on the books of the within   named Corporation with full power of substitution in the premises. Dated   NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS   WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT   ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATSOEVER. Signature(s) Guaranteed   By The Signature(s) must be guaranteed by an eligible guarantor institution   (Banks, Stockbrokers, Savings and Loan Associations and Credit Unions with   membership in an approved Signature Guarantee Medallion Program), pursuant to   SEC Rule 17Ad-15. THE CORPORATION WILL FURNISH TO ANY STOCKHOLDER, UPON   REQUEST AND WITHOUT CHARGE, A FULL STATEMENT OF THE DESIGNATIONS, RELATIVE   RIGHTS, PREFERENCES AND LIMITATIONS OF THE SHARES OF EACH CLASS AND SERIES   AUTHORIZED TO BE ISSUED, SO FAR AS THE SAME HAVE BEEN DETERMINED, AND OF THE   AUTHORITY, IF ANY, OF THE BOARD TO DIVIDE THE SHARES INTO CLASSES OR SERIES   AND TO DETERMINE AND CHANGE THE RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS   OF ANY CLASS OR SERIES. SUCH REQUEST MAY BE MADE TO THE SECRETARY OF THE   CORPORATION OR TO THE TRANSFER AGENT NAMED ON THIS CERTIFICATE. COLUMBIA   PRINTING SERVICES, LLC - www.stockinformation.com