exv4w1






Exhibit 4.1








	commonstock MOLECULAR INSIGHT PHARMACEUTICALS, INC. cusip 60852m 10 4] PAR
VALUE $0 01 PER SHARE see reverse for is the owner of FULLY PAID AND NON-ASSESSABLE SHARES
OF THE COMMON STOCK, PAR VALUE $0.01 PER SHARE, OF Molecular Insight Pharmaceuticals, Inc.
transferable on the books of the Corporation by the hokter hereof in person or by duly authorized
Attorney, upon surrender Of this Certificate, properly endorsed. This Certificate and 85 the shares
represented hereby are issued under and shall be held subject to tht laws of the Commonwealth of
Massachusetts and the Articles of Organization and By-Laws of the 5J33 Corporation and all
amendments thereto, copies of Which are on file With the Transfer Agent, to all of which the holder
of this Certificate assents by acceptance hereof. This Certificate is not valid until countersigned
and registered by the Transfer Agent and Registrar. WITNESS the facsimile seal of the Corporation
and the facsimile signatures of its duly authorized officers.





 









 









	The Corporation will furnish without charge to each stockholder who so requests the powers,
designations, preferences, and relative, participating, optional, or other special rights of each
class of stock or series thereof and the qualifications, limitations, or restrictions of such
preferences and/or rights. 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 TENENT
- as tenants by the entireties 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. PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF
ASSIGNEE a (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS. INCLUDING ZIP CODE, OF ASSIGNEE) THE
SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE NOTICE:
CERTIFICATE IN EVERY PARTICULAR. WITHOUT ALTERATION OR ENLARGEMENT OF1ANV CHANGE WHATEVER-
Signature(s) Guaranteed: THE SIGNATURE(S) SHOULD 66 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 S. E.G. RULE 17Ad-15. This certificate also
evidences and entitles the holder hereof to certain rights as set forth in a Rights Agreement
between Molecular,’ Insight Pharmaceuticals, Inc. and American Stock Transfer & Trust Company, LLC,
dated as of January 30,2009, and as such agreemsnt may be amended (the “Rights Agreement”), the
terms of which are hereby incorporated herein by reference and a copy.of which is-en file at !he
principal executive offices of Molecular Insight Pharmaceuticals, Inc. Under certain circumstances,
as set for in the Rights Agreement, such Rights will be evidenced by separate certificates and will
no longer be evidenced by this certificate. Molecular Insight Pharmaceuticals, Inc. will mail to
the holder of this certificate a copy of the Rights Agreement without charge after receipt of a
written request therefor. Under certain circumstances as set forth in the Rights Agreement, Rights
issued to, or held by, an Acquiring Person or any Affiliate or Associate thereof (as such terms are
defined in the Rights Agreement), whether held by such person or any subsequent’ holder, shall
become null and void.