Exhibit 4.1

SEE REVERSE FOR IMPORTANT NOTICE REGARDING OWNERSHIP AND TRANSFER RESTRICTIONS AND CERTAIN OTHER INFORMATION DERMTECH, INC. INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE COMMON STOCK CUSIP 24984K 10 5 SEE REVERSE FOR CERTAIN DEFINITIONS THIS CERTIFICATE THAT IS THE OWNER OF FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, $0.0001 PAR VALUE, OF DERMTECH, INC. (hereinafter called the “Company”), transferable on the books of the Company in Person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. This Certificate and the shares represented hereby, are issued and shall be held subject to all of the provisions of the Certificate of Incorporation, as amended, and the Bylaws, as amended, of the Company (copies of which are on file with the Company and with the Transfer Agent), to all of which each holder, by acceptance hereof, assents. This Certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar. WITNESS the facsimile signatures of its duly authorized officers. COUNTERSIGNED AND REGISTERED CONTINENTAL STOCK TRANSFER & TRUST COMPANY [New York, N.Y.] TRANSFER AGENT AND REGISTRAR BY authorized signature Secretary President 0000001

Exhibit 4.1

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 JT TEN – as joint tenants with right of survivorship and not as tenants in common TTEE – trustee under Agreement dated UNIF GIFT MIN ACT – Custodian under Uniform Gifts to Minors (Cust) (Minor) 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 TYPEWRITE NAME AND ADDRESS INCLUDING POSTAL ZIP CODE OF ASSIGNEE. Shares of the common stock represented by this certificate and do hereby irrevocably constitutes 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 GUARANTEED: THE SIGNATURE (S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION, (BANKS, STOCKHOLDERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15. THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER WHO SO REQUESTS, A SUMMARY OF THE POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OF THE COMPANY AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND RIGHTS, AND THE VARIATIONS IN RIGHTS, PREFERENCES AND LIMITATIONS DETERMINED FOR EACH SERIES, WHICH ARE FIXED BY THE CERTIFICATE OF INCORPORATION OF THE COMPANY, AS AMENDED, AND THE RESOLUTIONS OF THE BOARD OF DIRECTORS OF THE COMPANY, AND THE AUTHORITY OF THE BOARD OF DIRECTORS TO DETERMINEVARIATIONSFORFUTURESERIES.SUCHREQUESTMAYBEMADETOTHEOFFICEOFTHESECRETARYOFTHECOMPANYORTOTHE TRANSFER AGENT. THE BOARD OF DIRECTORS MAY REQUIRE THE OWNER OF A LOST OR DESTROYED STOCK CERTIFICATE, OR HIS LEGAL REPRESENTATIVES,TOGIVETHECOMPANYABONDTOINDEMNIFYITANDITSTRANSFERAGENTSANDREGISTRARSAGAINSTANYCLAIMTHAT MAY BEMADEAGAINSTTHEMONACCOUNTOFTHEALLEGEDLOSSORDESTRUCTION OFANYSUCHCERTIFICATE.