EXHIBIT 4.1

     NUMBER                                                        SHARES
      1775                                                      COMMON STOCK
  COMMON STOCK

                          MISSION WEST PROPERTIES, INC.

THIS CERTIFICATE IS TRANSFERABLE             SEE REVERSE FOR IMPORTANT NOTICE ON
IN DENVER, CO OR IN NEW YORK, NY               TRANSFER RESTRICTIONS AND OTHER
                                                         INFORMATION
                                                      CUSIP 605203 10 8
                          INCORPORATED UNDER THE LAWS
                            OF THE STATE OF MARYLAND

THIS CERTIFIES THAT



IS THE RECORD HOLDER OF


       FULLY PAID AND NONASSESSABLE SHARES OF THE COMMON STOCK, $.001 PAR
                              VALUE PER SHARE, OF

                          MISSION WEST PROPERTIES, INC.

(the "Corporation") transferable on the books of the Corporation in person or by
its  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 charter of the Corporation
(the "Charter") and the Bylaws of the  Corporation  and any amendments  thereto.
This  Certificate  is not  valid  unless  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.

Dated:



       SECRETARY                                                PRESIDENT




COUNTERSIGNED AND REGISTERED:
AMERICAN SECURITIES TRANSFER & TRUST, INC.
P.O. Box 1596, Denver, Colorado 90201


By

TRANSFER AGENT AND REGISTRAR AUTHORIZED SIGNATURE






                                IMPORTANT NOTICE

     The  Corporation  will furnish to any  stockholder,  on request and without
charge, a full statement of the information  required by Section 2-211(b) of the
Corporations  and  Associations  Article of the Annotated  Code of Maryland with
respect to the  designation  and any  preferences,  conversion and other rights,
voting   powers,   restrictions,   limitations   as  to   dividends   and  other
distributions,  qualifications,  and terms and  conditions  of redemption of the
stock of each class which the  Corporation  has  authority  to issue and, if the
Corporation is authorized to issue any preferred or special class in series, (i)
the  differences in the relative  rights and  preferences  between the shares of
each series to the extent set, and (ii) the  authority of the Board of Directors
to set such rights and preferences of subsequent  series.  The foregoing summary
does not purport to be complete and is subject to and  qualified in its entirety
by reference to the charter of the Corporation (the "Charter"),  a copy of which
be sent without charge to each stockholder who so requests. Such request must be
made to the  Secretary  of the  Corporation  at its  principal  office or to the
Transfer Agent.
     The  Corporation  will furnish a full statement  about the  restrictions on
transferability  with respect to the shares  represented by this  certificate to
each holder of Capital Stock of the  Corporation on request and without  charge.
Such request must be made to the Secretary of the  Corporation  at its principal
office or to the Transfer Agent.
     KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST,  STOLEN, OR DESTROYED
THE CORPORATION  WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE
OF A REPLACEMENT CERTIFICATE.

     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                                   (Cust)                 (Minor)
JT TEN    -as joint tenants with right of                              under Uniform Gifts to Minors Act
           survivorship and not as tenants in
           common                                                      ......................................
                                                                                       (State)

                                                    UNIF TRF MIN ACT -.............Custodian (until age .....)
                                                                          (Cust)

                                                                       ............. under uniform Transfers
                                                                          (Minor)
                                                                       to Minors Act ........................
                                                                                              (State)


Additional abbreviations may also be used though not in the above list.

FOR VALUE RECEIVED, ___________________ hereby sells, assigns and transfers unto

   PLEASE INSERT SOCIAL SECURITY OR OTHER
       IDENTIFYING NUMBER OF ASSIGNEE
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|                                           |
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  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

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                                                                          Shares
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of the  capital  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.

Date:
     ---------------------                X:
                                            ------------------------------------
                                          X:
                                            ------------------------------------
                                    NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT
                                            MUST CORRESPOND WITH THE NAME(S) 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 GUANRANTEE
MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.