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          FULLY PAID AND  NON-ASSESSABLE  SHARES  OF COMMON    STOCK OF $.001 PAR VALUE EACH  OF        ______________                     ACCELERATE DIAGNOSTICS, INC. ==============--­ transferable on the books of the Corporation in person or by duly authorized 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                                                                        BY;                                                                                                     AUTHORIZED SIGNATURE  





 






          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                                UNIF GIFT MIN ACT -      .................... Custodian................... .      TEN ENT     - as tenants by the entireties                                                      (Gust)                   (Minor)     JT TEN      - as joint tenants with right of                                               under Uniform    Gifts to Minors                   survivorship and not as tenants                                              Act                   in common                                                                                (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 SECURllY 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 ASSIGNMENTMUST  CORRESPOND \l\nTH THE NAME AS WRITTEN UPON THE FACE                                                           OF THECERTIFICATE  IN EVERY PARTICULAR, \l\nTHOUTALTERATION  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 VV1LLFURNISH       TO ANY STOCKHOLDER, UPON REQUEST AND VV1THOUTCHARGE,            A FULL STATEMENT OF THE DESIGNATIONS,  RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF THE SHARES OF EACH CLASSAND               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 CLASSESOR         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