MISSION WEST PROPERTIES INC
S-8, 1999-06-10
OPERATORS OF NONRESIDENTIAL BUILDINGS
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As filed with the Securities and Exchange Commission on June 9, 1999.

                                                        File No. 333-__________

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933

                          MISSION WEST PROPERTIES, INC.
             (Exact Name of Registrant as Specified in Its Charter)

             Maryland                                    95-2635431
   (State or Other Jurisdiction             (I.R.S. Employee Identification No.)
 of Incorporation or Organization)

                    10050 Bandley Drive, Cupertino, CA 95014
                                  (408)725-0700
   (Address, including ZIP Code and Telephone Number, of Principal Executive
                                    Offices)


                          MISSION WEST PROPERTIES, INC.
                             1997 STOCK OPTION PLAN
                            (Full Title of the Plan)

                                Mr. Carl E. Berg
                10050 Bandley Drive, Cupertino, California 95014
                    (Name and Address of Agent For Service)

                                (408) 725-0700
         (Telephone Number, Including Area Code, of Agent For Service)

                                   Copies to:
                                  Alan B. Kalin
                                Daniel D. Meyers
                     McCutchen, Doyle, Brown & Enersen, LLP
               3150 Porter Drive, Palo Alto, California 94304-1212
                     Tel: (650)840-4400, Fax: (650)849-4800
<TABLE>
<CAPTION>

                         CALCULATION OF REGISTRATION FEE
- --------------------------------------------------------------------------------------
   Title of
  Each Class                                Proposed       Proposed
      of                                    Maximum        Maximum
  Securities               Amount To        Offering       Aggregate     Amount of
     To Be                    Be            Price Per      Offering     Registration
  Registered              Registered(1)       Unit*         Price*          Fee
- --------------------------------------------------------------------------------------
<S>                       <C>              <C>           <C>               <C>
Outstanding shares and       392,917        $4.50(2)      $ 1,768,127     $   492
  options to purchase
  Common Stock, $.001
  par value

Common Stock, $.001        5,092,083        $8 3/8(4)     $42,646,196     $11,856
  par value, reserved
  for future option
  grants(3)
                           ---------        --------      -----------     -------
  TOTAL                    5,485,000           -          $44,414,323     $12,348
</TABLE>

- ------------------------------------------------------------------------------

(1)  This  Registration  Statement  shall  also cover any  additional  shares of
     common stock which become issuable by reason of any stock  dividend,  stock
     split,  recapitalization or other similar transaction  effected without the
     reciept of consideration  which results in an increase in the number of the
     outstanding shares of stock.

(2)  Fee calculated  pursuant to Rule 457(h)(i) based upon the weighted  average
     exercise price of options  granted and outstanding as of May 28, 1999 which
     equals the maximum  aggregate  offering price for all  outstanding  options
     divided by the number of shares of common stock subject to the  outstanding
     options.

(3)  Shares of common stock issuable on exercise of options which may be granted
     in the future under the option plan.

(4)  Estimated  solely  for  the  purpose  of  calculating  the  amount  of  the
     registration  fee based on the average of the high and low prices  reported
     for the  common  stock on the  American  Stock  Exchange  on June 9,  1999,
     pursuant to Rule 457(h)(1) and 457(c).

*    Estimated  solely  for  the  purpose  of  calculating  the  amount  of  the
     registration  fee based on the average of the high and low prices  reported
     for the Common  Stock  on the  American  Stock  Exchange on  June 9,  1999,
     pursuant to Rule 457(h)(i).

     The Registration Statement shall become effective upon filing in accordance
with Rule 462 under the Securities Act of 1933.

<PAGE>

                                 450,000 SHARES

                          MISSION WEST PROPERTIES, INC.

                                  COMMON STOCK
                                ----------------

     This prospectus  relates to the reoffer and resale of 450,000 shares of our
common stock, $.001 par value, which have been or may be acquired under our 1997
Stock Option Plan, or Option Plan, or other employee  benefit plans.  The shares
of Common Stock  acquired under the Option Plan may be offered from time to time
by the selling  stockholders  named or described in this prospectus.  The shares
may be offered  through  brokers  and  dealers  to be  selected  by the  selling
stockholders,  and may be offered for sale through the American Stock  Exchange,
or "AMEX",  or the Pacific  Exchange  Incorporated,  or "PSE",  pursuant to this
registration  statement,  pursuant to Rule 144, in negotiated  transactions,  at
fixed prices, at market prices prevailing at the time of sale, at prices related
to prevailing market prices or at negotiated prices.
See "Selling Stockholders" and "Plan of Distribution."

      We will receive  none of the  proceeds  from the sale of the shares by the
selling  stockholders.  We have agreed to bear certain  expenses,  including the
fees and costs of  preparing,  filing and keeping  effective  this  registration
statement  (other than selling  commissions and fees and expenses of counsel and
other advisors to the selling  stockholders) in connection with the registration
of the shares.

      Our common stock is listed on the AMEX and the PSE under the symbol "MSW".
On June 9, 1999,  the closing price of the common stock,  as quoted on the AMEX,
was $8 3/8.

                               -------------------

                  INVESTING IN OUR COMMON STOCK INVOLVES RISKS.
                     SEE "RISK FACTORS" BEGINNING ON PAGE 5.
                               -------------------

      The selling  stockholders and any  broker-dealers,  agents or underwriters
that participate with the selling stockholders in the distribution of the shares
may be deemed to be  "underwriters"  within the meaning of Section  2(11) of the
Securities Act of 1933, and any  commissions  received by them and any profit on
the  resale  of  the  shares  purchased  by  them  may  be  deemed  underwriting
commissions or discounts under the Securities Act.

      Neither the  Securities and Exchange  Commission nor any state  securities
commission has approved or disapproved of these securities or determined if this
prospectus  is truthful or  complete.  Any  representation  to the contrary is a
criminal offense.

                  The date of this prospectus is June 10, 1998.



<PAGE>

<TABLE>
<CAPTION>


                                TABLE OF CONTENTS
<S>                                                                  <C>
Available Information .................................................3

Information Incorporated by Reference..................................3

Risk Factors ..........................................................4

Use of Proceeds ......................................................11

The Selling Stockholders .............................................11

Plan of Distribution .................................................12

Legal Matters ........................................................12

Experts ..............................................................12

Disclosure of Commission Position on Indemnification
   for Securities Act Liabilities ....................................12

</TABLE>



                                     - 2 -
<PAGE>


                              AVAILABLE INFORMATION

      We  are  subject  to the  informational  requirements  of  the  Securities
Exchange Act of 1934, as amended,  or the "Exchange Act". In accordance with the
Exchange  Act,  we  file  all  required  reports,  proxy  statements  and  other
information with the Securities and Exchange  Commission,  or the  "Commission".
Reports, proxy statements and other information filed by us may be inspected and
copied at the public  reference  facilities  maintained by the Commission at 450
Fifth Street, N.W., Room 1024,  Washington,  D.C. 20549, and at the Commission's
regional offices located at 7 World Trade Center, 13th Floor, New York, New York
10048,  and Citicorp  Center,  500 West  Madison  Street,  Suite 1400,  Chicago,
Illinois  60661;  and copies of such  material  may be obtained  from the Public
Reference  Section of the  Commission,  Washington,  D.C.  20549,  at prescribed
rates. In addition,  the Commission  maintains a web site that contains reports,
proxy and information  statements and other  information  regarding  registrants
that  file  electronically  with  the  Commission  ("http://www.sec.gov").  Such
reports,  proxy  statements and other  information  may also be inspected at the
offices of the American Stock  Exchange,  86 Trinity Place,  New York, New York,
and the Pacific  Exchange  Incorporated,  115  Sansome  Street,  8th Floor,  San
Francisco, California.

                      INFORMATION INCORPORATED BY REFERENCE

      The following  documents filed by us with the Commission are  incorporated
by reference in this prospectus:

      1. Our Annual  Report on Form 10-K for the fiscal year ended  December 31,
1998.

      2. All other  reports  filed  pursuant  to  Section  13(a) or 15(d) of the
Exchange Act since December 31, 1998.

      3. The  description  of our common  stock  contained  in our  registration
statement on Form S-4 filed on May 15, 1998 and  declared  effective on November
23, 1998 (Registration #333-52835-99) and the prospectus dated November 23, 1998
filed pursuant to Rule 424(b).

      The  above-listed  documents  are on  file  with  the  Commission  and are
incorporated  in this  prospectus  by  reference  and  made a part  hereof.  All
documents we subsequently filed pursuant to Section 13(a), 13(c), 14 or 15(d) of
the Exchange Act,  prior to the  termination of the offering of the common stock
under this prospectus  shall be deemed to be incorporated by reference into this
prospectus registration  statement.  Any statement contained in this prospectus,
any prospectus  supplement or in a document  incorporated  by reference shall be
deemed  modified or superseded  to the extent that a statement  contained in any
prospectus  supplement or in any other subsequently filed document which also is
or is deemed to be  incorporated  by  reference  herein or therein  modifies  or
supersedes such statement.  Any statement so modified or superseded shall not be
deemed to constitute a part hereof, except as so modified or superseded.

      We will cause to be furnished  without  charge to each person to whom this
prospectus  is  delivered,  upon the written or oral request of such  person,  a
complete copy of the above  referenced Form 10-K or Form 10-Q or other documents
filed under the Exchange  Act.  Requests  should be addressed  to:  Mission West
Properties, 10050 Bandley Drive, Cupertino, CA 95014; telephone:
(408) 725-0700.

                                     - 3 -



<PAGE>

                                 RISK FACTORS

     You should carefully consider the following risks,  together with the other
information  contained and  incorporated by reference in this prospectus  before
deciding to invest in shares of our common  stock.  The  following  risks relate
principally to our business and the industry in which we operate.  The risks and
uncertainties classified below are not the only ones we face.

WE ARE  DEPENDENT ON CARL E. BERG,  AND IF WE LOSE HIS SERVICES OUR BUSINESS MAY
BE HARMED AND OUR STOCK PRICE COULD FALL.

     We are  substantially  dependent  upon the  leadership of Carl E. Berg, our
Chairman, President and Chief Executive Officer. Losing Mr. Berg's knowledge and
abilities could have a material  adverse effect on our business and the value of
our common stock. He manages our day-to-day operations and devotes a significant
portion  of his  time to our  affairs,  but he has a number  of  other  business
interests as well.  These other  activities  reduce Mr. Berg's  attention to our
business.


MR.  BERG  AND HIS  AFFLILIATES  EFFECTIVELY  CONTROL  OUR  CORPORATION  AND THE
OPERATING  PARTNERSHIPS  AND MAY ACT IN WAYS THAT ARE  DISADVANTAGEOUS  TO OTHER
STOCKHOLDERS.

     SPECIAL BOARD VOTING PROVISIONS.  Our governing corporate documents,  which
are our  articles of  amendment  and  restatement,  or charter,  and our bylaws,
provide  substantial control rights for the Berg Group. The Berg Group's control
of our  corporation  means that the value and returns from your investment in us
are subject to the Berg Group's  exercise of its rights.  These rights include a
requirement   that  Mr.  Berg  or  his  designee  as  director  approve  certain
fundamental  corporate actions,  including  amendments to our charter and bylaws
and any merger, consolidation or sale of all or substantially all of our assets.
In addition,  our bylaws provide that a quorum necessary to hold a valid meeting
of the board of  directors  must  include Mr. Berg or his  designee.  The rights
described in the two  preceding  sentences  apply only as long as the Berg Group
members  and  their  affiliates, other than us and the  operating  partnerships,
beneficially  own, in the aggregate,  at least 15% of the outstanding  shares of
common  stock  on a fully  diluted  basis,  which  is  calculated  based  on all
outstanding  shares of common stock and all shares of common stock that could be
acquired  upon the  exercise  of all  outstanding  options to acquire our voting
stock,  as well as all shares of common stock issuable upon exchange of all O.P.
Units.  Also,  directors  representing  more  than  75% of the  entire  board of
directors must approve other  significant  transactions,  such as incurring debt
above certain  amounts and conducting  business other than through the operating
partnerships.  Without  the  approval  of Mr.  Berg or his  designee,  board  of
directors  approval  that we may need for actions that might result in a sale of
your  stock at a premium  or  raising  additional  capital  when  needed  may be
difficult or impossible to obtain.

     BOARD OF DIRECTORS REPRESENTATION. The Berg Group members have the right to
designate  two of the director  nominees  submitted by our board of directors to
stockholders  for  election,  as  long  as the  Berg  Group  members  and  their
affiliates, other than us and the operating  partnerships,  beneficially own, in
the aggregate, at least 15% of the outstanding shares of common stock on a fully
diluted basis,  which is calculated  based on all  outstanding  shares of common
stock and all shares of common stock that could be acquired upon the exercise of
all  outstanding  options to acquire our voting stock,  as well as all shares of
common stock  issuable  upon  exchange of all O.P.  Units.  If the fully diluted
ownership of the Berg Group members and their affiliates,  other than us and the
operating  partnerships,  is less  than  15% but is at least  10% of the  common
stock,  the Berg Group  members have the right to designate  one of the director
nominees submitted  by our board of directors to stockholders for election.  Its
right to designate director nominees affords the Berg Group substantial  control
and influence  over the management  and direction of our  corporation.  The Berg
Group's  interests  could conflict with the interests of our  stockholders,  and
could  adversely  affect the price of our common  stock.

     SUBSTANTIAL  OWNERSHIP  INTEREST.  The Berg Group currently owns O.P. Units
representing  approximately  84.7%  of the  equity  interests  in the  operating
partnerships and approximately  84.5% of our equity interests on a fully diluted
basis,  which is calculated based on all outstanding  shares of common stock and
all shares of common stock that

                                     - 4 -

<PAGE>

could be acquired  upon the exercise of all  outstanding  options to acquire our
voting  stock,  as well as all shares of common stock  issuable upon exchange of
all O.P.  Units.  The O.P.  Units may be converted  into shares of common stock,
subject to limitations  set forth in our charter and other  agreements  with the
Berg  Group,   and  upon  conversion  would  represent  voting  control  of  our
corporation.  The Berg  Group's  ability to exchange  its O.P.  Units for common
stock  permits  it to  exert  substantial  influence  over  the  management  and
direction of our  corporation.  This  influence  increases our dependence on the
Berg Group.

     LIMITED  PARTNER  APPROVAL  RIGHTS.  Mr. Berg and other  limited  partners,
including  other  members of the Berg Group,  may  restrict our  operations  and
activities  through rights  provided under the terms of the amended and restated
agreement  of  limited   partnership   which   governs  each  of  the  operating
partnerships  and our legal  relationship  to each operating  partnership as its
general partner.  Matters requiring approval of the holders of a majority of the
O.P.  Units,  which  necessarily  would  include  the Berg  Group,  include  the
following:

     -    the  amendment,  modification  or  termination of any of the operating
          partnership agreements;

     -    the  transfer of any  general  partnership  interest in the  operating
          partnerships,  including with certain exceptions, transfers attendant
          to any merger, consolidation or liquidation of our corporation;

     -    the admission of any additional or substitute  general partners in the
          operating partnerships;

     -    any other change of control of the operating partnerships;

     -    a general  assignment for the benefit of creditors or the  appointment
          of a  custodian,  receiver  or  trustee  for any of the  assets of the
          operating partnerships; and

     -    the  institution  of  any  bankruptcy  proceeding  for  any  operating
          partnership.

     In addition,  as long as the Berg Group members and their affiliates, other
than us and the operating  partnerships,  beneficially own, in the aggregate, at
least 15% of the  outstanding  shares of common stock on a fully diluted  basis,
which is  calculated  based on all  outstanding  shares of common  stock and all
shares  of  common  stock  that  could  be  acquired  upon the  exercise  of all
outstanding options to acquire our voting stock, as well as all shares of common
stock  issuable  upon  exchange  of all O.P.  Units,  the consent of the limited
partners  holding the right to vote a majority of the total number of O.P. Units
outstanding is also required with respect to:

     -    the sale or other transfer of all or  substantially  all of the assets
          of  the  operating  partnerships  and  certain  mergers  and  business
          combinations resulting in the complete disposition of all O.P. Units;

     -    the issuance of limited partnership interests senior to the O.P. Units
          as to distributions, assets and voting; and

     -    the liquidation of the operating partnerships.

     The liquidity of your investment in our common stock, including our ability
to respond to  acquisition  offers,  will be  subject to the  exercise  of these
rights.

OUR CONTRACTUAL  BUSINESS  RELATIONSHIP WITH THE BERG GROUP PRESENTS  ADDITIONAL
CONFLICTS OF INTERESTS WHICH MAY RESULT IN THE  REALIZATION OF ECONOMIC BENEFITS
OR THE DEFERAL OF TAX LIABILITIES BY THE BERG GROUP WITHOUT EQUIVALENT  BENEFITS
TO OUR STOCKHOLDERS

     Our  contracts  with the Berg Group  provide it with  interests  that could
conflict with the interests of our other stockholders, including the following:

                                      - 5 -

<PAGE>

     -    our headquarters are leased from an entity owned by the Berg Group, to
          whom we pay rent of approximately $6,700 per month;

     -    the Berg Group is  permitted  to  conduct  real  estate  and  business
          activities other than our business;

     -    if we decline  an  opportunity  that has been  offered to us, the Berg
          Group may pursue it,  which  would  reduce the amount of time that Mr.
          Berg could  devote to our affairs and could result in the Berg Group's
          development  of  properties  that  compete  with  our  properties  for
          tenants;

     -    in general, we have agreed to limit the liability of the Berg Group to
          our  corporation  and our  stockholders  arising from the Berg Group's
          pursuit of these other opportunities;

     -    we acquired most of our  properties  from the Berg Group on terms that
          were not  negotiated  at  arm's  length  and  without  many  customary
          representations  and  warranties  that  we  would  have  sought in  an
          acquisition from an unrelated party; and

     -    we have  assumed  liability  for debt to the Berg  Group  and debt for
          which the Berg Group was liable.

     The Berg Group has agreed that the independent  directors  committee of our
board of directors must approve all new transactions between us and any of them,
or between us and any entity in which it directly or indirectly  owns 5% or more
of the equity interests,  including the operating partnerships for this purpose.
This committee  currently consists of three directors who are independent of the
Berg Group.

     EXCLUDED PROPERTIES.  With our prior knowledge, the Berg Group retained two
R&D properties in Scotts  Valley,  California, in Santa Cruz County, in which we
and the operating  partnerships have no ownership interest.  Efforts of the Berg
Group to lease these other  properties may interfere with similar efforts on our
behalf.

     PENDING DEVELOPMENT PROJECTS. We and the operating partnerships have agreed
under the terms of a pending projects acquisition  agreement to acquire from the
Berg Group each of five R&D  properties  potentially  aggregating  approximately
395,000  rentable square feet as it is completed and leased.  The purchase price
for  each  property  will be  calculated  based on a fixed  capitalization  rate
applied to actual  average  rental rates on the property over the lease term. We
currently  estimate that the aggregate  purchase price of these five properties,
assuming payment in cash and/or assumption of debt, will be approximately  $41.9
million. The Berg Group may elect to receive cash or O.P. Units, valued at $4.50
per unit,  which value was set when we entered  into the  acquisition  agreement
with the Berg Group in May 1998.  Our stock was not trading at that time. As the
market  price  of a share  of  common  stock  was $8 3/8 at June 9,  1999,  this
valuation represents a substantial discount from the current market value of the
common stock that may be issued in exchange for these O.P.  Units.  Our issuance
of O.P.  Units to acquire any of these  properties,  instead of paying cash, may
result in a higher  acquisition cost and additional  depreciation  expenses that
reduce our net income per share.  Acquisitions  of  additional  O.P.  Units will
increase  the Berg Group's  ownership  interest in our business and could reduce
the  amount  of  cash  available  for   distribution  per  share  to  our  other
stockholders which could cause our stock price to fall.

     The Berg Group's election to receive  cash in place of O.P. Units for these
properties  and to  place debt on the  properties  that we would be  required to
assume would reduce our  liquidity  and could  increase our debt to total market
capitalization  ratio. These factors could harm our business and cause our stock
price to fall, while the Berg Group receives substantial benefits.

     BERG LAND  HOLDINGS.  The Berg  Group  owns or has an  option  to  purchase
several  parcels  of  unimproved  land  in the  Silicon  Valley  that we and the
operating  partnerships  have the right to  acquire  under the terms of the Berg
land holdings option agreement.  The Berg Group is not obligated to exercise the
option  that it holds to acquire  one of the  properties  that is subject to the
agreement,  however.  If the Berg Group fails to exercise  that option,  we will
lose the ability to purchase that property. In addition, we have agreed to pay a
fixed  amount  plus  additional  charges  for any of the  properties  that we do
acquire. We must pay the acquisition price in cash unless the Berg Group elects,
in its discretion, to receive O.P. Units valued at the average

                                     - 6 -
<PAGE>

market price of a share of common stock during the 30-day  period  preceding the
acquisition  date. At the time of acquisition,  which is subject to the approval
of  the  independent  directors  committee  of our  board  of  directors,  these
properties may be encumbered by debt that we or the operating  partnerships will
be  required  to  assume  or repay.  The use of our cash or an  increase  in our
indebtedness to acquire these properties could have a material adverse effect on
our  financial  condition,  results  of  operations  and  ability  to make  cash
distributions to our stockholders.

     TAX CONSEQUENCES OF SALE OF PROPERTIES. Because many of our properties have
unrealized  taxable gain, a sale of these properties could create adverse income
tax  consequences for limited  partners of the operating  partnerships.  We have
agreed  with  Carl E.  Berg,  Clyde J. Berg and John  Kontrabecki  that each can
prevent  us  and  the  operating   partnerships  from  selling  or  transferring
properties, that were directly or indirectly acquired from him in July, 1998, in
any  taxable   transaction  prior  to  December  29,  2008.  As  a  result,  our
opportunities to sell these properties may be limited. If we need to sell any of
these properties to raise cash to service our debt, acquire new properties,  pay
cash distributions to stockholders or for other working capital purposes, we may
be unable to do so.  These  restrictions  could harm our  business and cause our
stock price to fall.

     TERMS OF TRANSFER;  ENFORCEMENT  OF AGREEMENT OF LIMITED  PARTNERSHIP.  The
terms of the pending  projects  acquisition  agreement,  the Berg land  holdings
option agreement,  the partnership agreement of each operating partnership,  and
other  material  agreements  through which we have acquired our interests in the
operating  partnerships and the properties formerly controlled by the Berg Group
were  not  determined  through  arm's-length  negotiations,  and  could  be less
favorable to us than those obtained from an unrelated  party.  In addition,  Mr.
Berg and representatives of the Berg Group sitting on our board of directors may
be subject to conflicts of interests  with respect to their  obligations  as our
directors to enforce the terms of the  partnership  agreement of each  operating
partnership when such terms conflict with their personal interests. The terms of
our  charter  and  bylaws  also  were  not   determined   through   arm's-length
negotiations.  Some of these terms,  including  representations  and  warranties
applicable to acquired  properties,  are not as favorable as those that we would
have  sought  through  arm's-length  negotiations with  unrelated parties.  As a
result,  an  investment  in our  common  stock  may  involve  risks not found in
businesses  in which the terms of material  agreements  have been  negotiated at
arm's length.

     RELATED  PARTY  DEBT.  As of March  31,  1999,  we were  liable  for  loans
aggregating  approximately  $24.1 million payable to the Berg Group. These loans
are secured by three of our properties and were initially scheduled to mature on
March 31,  1999.  The  maturity  date has been  extended to December 31, 1999 by
agreement with the Berg Group.  Effective  September 30, 1998, we assumed a $100
million  line of credit  with Wells Fargo Bank N.A.  previously  provided to and
guaranteed by the Berg Group, which is secured by 14 of our properties.  We have
the right to draw on the line of credit  and are  liable  for  repayment  of all
amounts  owing  under the line of  credit,  which  totaled  approximately  $18.5
million at March 31,  1999.  The Berg Group  continues to be liable as guarantor
under the line of credit,  which expires on October 1, 1999.  All of these loans
bear interest at an annual rate equal to that under the Wells Fargo Bank line of
credit.  If we are  unable to repay our debts to the Berg  Group or Wells  Fargo
Bank when due, however,  the Berg Group, in addition to the lenders,  could take
action to enforce  our  payment  obligations.  Loan  defaults of this type could
materially adversely affect our business, financial condition and our results of
operations  and cause  our stock  price to fall.  They  also  could  result in a
substantial  reduction in the amount of cash  distributions to our stockholders.
In turn,  if we fail to meet the minimum  distributions  test  because of a loan
default or another  reason,  we could lose our REIT  classification  for federal
income tax purposes.

     In December 1998 and April 1999, in our capacity as the general  partner of
each of the  operating  partnerships,  we  declared  cash  distributions  to all
partners.  The  total  distributions  of  approximately  $16.5  million  in  the
aggregate to the Berg Group were loaned back to the  operating  partnerships  in
lieu of having them draw additional funds under the line of credit.  As of March
31, 1999, the amount owed was $9.6 million,  which represents the portion of the
loan  related to the  December  1998  distribution.  The Berg Group may  request
repayment of these funds at any time. Such requests might be made when we or the
operating  partnerships  do not have  sufficient  funds  available  to repay the
loans. In that case, the Berg Group would have the right to take legal action to
enforce our  obligation  to repay the  requested  amounts,  which could harm our
business and  financial  condition  and could cause our stock price to fall.  In
addition,  we do not  anticipate  that the Berg  Group will  always  allow us to
retain  distributions  payable  to the  Berg  Group as a  source  of  additional
financing of our operations.

                                     - 7 -

<PAGE>

WE MAY CHANGE OUR INVESTMENT AND FINANCING POLICIES AND INCREASE YOUR INVESTMENT
RISK WITHOUT STOCKHOLDER APPROVAL.

     Our board of directors  determines the investment and financing policies of
the  operating  partnerships  and our  policies  with  respect to certain  other
activities, including our business growth, debt capitalization, distribution and
operating policies.  Our board of directors may amend these policies at any time
without a vote of the  stockholders.  Changes in these policies could materially
adversely affect our financial  condition,  results of operations and ability to
make cash  distributions to our  stockholders, which could harm our business and
cause our stock price to fall.

ANTI-TAKEOVER  PROVISIONS IN OUR CHARTER COULD PREVENT ACQUISITIONS OF OUR STOCK
AT A SUBSTANTIAL PREMIUM.

     Provisions  of our charter and our bylaws could  delay,  defer or prevent a
transaction or a change in control of our corporation, or a similar transaction,
that might  involve a premium  price for our shares of common stock or otherwise
be in the best interests of our stockholders. Provisions of the Maryland general
corporation  law,  which would apply to  potential  business  combinations  with
acquirers  other  than the Berg  Group or  stockholders  who  invested  in us in
December 1998, also could prevent the acquisition of our stock for a premium.

AN INVESTMENT  IN OUR STOCK  INVOLVES  RISKS RELATED TO REAL ESTATE  INVESTMENTS
THAT COULD HARM OUR BUSINESS AND CAUSE OUR STOCK PRICE TO FALL.

     RENTAL  INCOME  VARIES.  Real property  investments  are subject to varying
degrees of risk.  Investment  returns available from equity  investments in real
estate  depend  in  large  part on the  amount  of  income  earned  and  capital
appreciation  which our  properties  generate,  as well as our related  expenses
incurred.  If our  properties  do  not  generate  revenues  sufficient  to  meet
operating  expenses,  debt  service  and  capital  expenditures,  our income and
ability to make  distributions to our stockholders  will be adversely  affected.
Income from our  properties may also be adversely  affected by general  economic
conditions,  local  economic  conditions  such as oversupply of commercial  real
estate, the attractiveness of our properties to tenants and prospective tenants,
competition  from  other  available  rental  property,  our  ability  to provide
adequate  maintenance and insurance,  the cost of tenant  improvements,  leasing
commissions  and tenant  inducements  and the  potential of increased  operating
costs, including real estate taxes.

     EXPENDITURES FOR PROPERTY  OWNERSHIP ARE FIXED.  Income from properties and
real  estate  values are also  affected by a variety of other  factors,  such as
governmental  regulations and applicable laws, including real estate, zoning and
tax laws,  interest  rate levels  and the  availability  of  financing.  Various
significant  expenditures  associated with an investment in real estate, such as
mortgage payments, real estate taxes and maintenance expenses, generally are not
reduced when  circumstances  cause a reduction  in revenue from the  investment.
Thus,  our  operating  results and our cash flow may decline  materially  if our
rental income is reduced.

     ILLIQUIDITY.  Real estate investments are relatively illiquid, which limits
our ability to  restructure  our portfolio in response to changes in economic or
other conditions.

     GEOGRAPHIC CONCENTRATION. All of our properties are located in the southern
portion of the San  Francisco  Bay Area  commonly  referred  to as the  "Silicon
Valley." The Silicon  Valley economy has been strong for the past several years,
but  future  increases  in  values  and  rents  for our  properties  depend to a
significant extent on the health of this region's economy. Recent trends suggest
that the supply of R&D office space  available  for rent has  increased and that
the demand for such space in the Silicon  Valley has declined.  According to "BT
Commercial Real Estate Silicon Valley R & D Report, Q1 1999", vacancy rates rose
from approximately 5.1% in early 1998 to 11.9% in early 1999.

     LOSS OF KEY TENANTS. Most of our properties are occupied by single tenants,
many of whom are large, publicly traded information technology companies. Losing
a key tenant could  adversely  affect our  operating  results and our ability to
make  distributions  to  stockholders  if we are  unable to  obtain  replacement
tenants promptly.

                                     - 8 -

<PAGE>

     TENANT  BANKRUPTCIES.   Key  tenants  could  seek  the  protection  of  the
bankruptcy  laws,  which could result in the rejection and  termination of their
leases, thereby causing a reduction in our income.

     OUR  SUBSTANTIAL  INDEBTEDNESS.  Our  properties are subject to substantial
indebtedness.  If we are unable to make required mortgage payments, a loss could
be sustained as a result of  foreclosure  on our  properties  by the  mortgagee.
Failure to renew or replace  our Wells  Fargo line of credit  when it expires in
October  1999  would  materially  affect  our  business  and our  ability to pay
dividends to stockholders. We cannot assure you that we will be able to obtain a
replacement line of credit with terms similar to the Wells Fargo line of credit,
or at all. Our cost of borrowing funds could  increase  substantially  after the
Wells Fargo line of credit  expires.  We have adopted a policy of  maintaining a
consolidated  ratio of debt to total market  capitalization,  which includes for
this  purpose  the  market  value  of all  shares  of  common  stock  for  which
outstanding O.P. Units are exchangeable, of less than 50%. This ratio may not be
exceeded without the approval of more than 75% of our entire board of directors.
Our board of  directors  may vote to change this policy,  however,  and we could
become more highly  leveraged,  resulting in an increased risk of default on our
obligations  and an increase in debt service  requirements  that could adversely
affect our financial  condition,  our operating  results and our ability to make
distributions to our stockholders.

     ENVIRONMENTAL CLEAN-UP LIABILITIES.  Our properties and properties formerly
held  by  our  subsidiaries  may  expose  us  to  liabilities  under  applicable
environmental and health and safety laws. If these liabilities are material, our
financial  condition  and  ability  to pay cash  distributions  may be  affected
adversely, which would cause our stock price to fall.

     UNINSURED  LOSSES.  We may sustain uninsured losses with respect to some of
our  properties.  If these losses are  material,  our financial  condition,  our
operating results and our ability to make  distributions to our stockholders may
be affected adversely.

     EARTHQUAKE  DAMAGES ARE  UNINSURED.  All of our  properties  are located in
areas that are subject to earthquake  activity.  Our  insurance  policies do not
cover  damage  caused by seismic  activity,  although  they do cover losses from
fires after an earthquake.  We generally do not consider such insurance coverage
to be economical.  If an earthquake occurs and results in substantial  damage to
our  properties,  we could lose our investment in those  properties,  which loss
would have a material adverse effect on our financial  condition,  our operating
results and our ability to make distributions to our stockholders.

FAILURE TO SATISFY  FEDERAL INCOME TAX  REQUIREMENTS  FOR REITS COULD REDUCE OUR
DISTRIBUTIONS, REDUCE OUR INCOME AND CAUSE OUR STOCK PRICE TO FALL.

     FAILURE  TO  QUALIFY  AS A REIT.  We intend to elect to be a REIT and to be
taxed as such under the federal income tax laws for the year ending December 31,
1999.  Although we currently intend to operate in a manner designed to enable us
to qualify and maintain our REIT status,  it is possible that economic,  market,
legal, tax or other  considerations may cause us to fail to qualify as a REIT or
may cause our board of directors either to refrain from making the REIT election
or to revoke that  election  once made.  To maintain  REIT status,  we must meet
certain  tests for income,  assets,  distributions  to  stockholders,  ownership
interests and other significant  conditions.  If we fail to qualify as a REIT in
any taxable year, we will not be allowed a deduction  for  distributions  to our
stockholders  in  computing  our taxable  income and would be subject to federal
income tax,  including any  applicable  alternative  minimum tax, on our taxable
income at regular corporate rates.  Moreover,  unless we were entitled to relief
under  certain  provisions  of the tax  laws,  we  would  be  disqualified  from
treatment as a REIT for the four taxable  years  following the year in which our
qualification  was lost. As a result,  funds  available for  distribution to our
stockholders  would be reduced for each of the years  involved and, in addition,
we would no longer be required to make distributions to our stockholders.

     REIT DISTRIBUTION REQUIREMENTS. To maintain REIT status, we must distribute
as a dividend to our stockholders at least 95% of our otherwise  taxable income,
after certain adjustments, with respect to each tax year. We may also be subject
to a 4% non-deductible excise tax in the event our distributions to stockholders
fail  to  meet  certain  other  requirements.   Failure  to  comply  with  these
requirements  could  result  in our  income  being  subject  to  tax at  regular
corporate rates and could cause us to be liable for the excise tax.

                                     - 9 -

<PAGE>

     OWNERSHIP  LIMIT NECESSARY TO MAINTAIN REIT  QUALIFICATION.  As a REIT, the
federal tax laws  restrict the  percentage  of the total value of our stock that
may be owned by five or fewer  individuals to 50% or less. Our charter generally
prohibits  the direct or indirect  ownership of more than 9% of our common stock
by any stockholder.  This limit excludes the Berg Group,  which has an aggregate
ownership limit of 20%. In addition,  as permitted by our charter,  our board of
directors  recently provided an exception to two other stockholders that permits
them to  collectively  own,  directly or  indirectly,  up to 18.5% of our common
stock  on an  aggregate  basis,  subject  to the  terms  of an  ownership  limit
exemption  agreement.  In general,  our charter prohibits the transfer of shares
which  result in a loss of our REIT  qualification  and  provides  that any such
transfer  or any  other  transfer  which  causes a  stockholder  to  exceed  the
ownership limit will result in the shares being  automatically  transferred to a
trust for the benefit of a charitable beneficiary.

STOCKHOLDERS ARE NOT ASSURED OF RECIEVING CASH DISTRIBUTIONS FROM US.

     Our  income  will  consist  primarily  of our  share of the  income  of the
operating partnerships, and our cash flow will consist primarily of our share of
distributions from the operating partnerships. Differences in timing between the
receipt of income and the payment of expenses in arriving at our taxable  income
or the taxable income of the operating  partnerships  and the effect of required
debt amortization payments could require us to borrow funds, directly or through
the  operating  partnerships,  on  a  short-term  basis  to  meet  our  intended
distribution policy.

     Our  board  of  directors   will   determine   the  amount  and  timing  of
distributions  by  the  operating  partnerships  and  of  distributions  to  our
stockholders.  Our board of directors will consider many factors prior to making
any distributions, including the following:

     -    the amount of cash available for distribution;
     -    the operating partnerships' financial condition;
     -    whether to reinvest funds rather than to distribute such funds;
     -    the operating partnerships' capital expenditures;
     -    the effects of new property acquisitions, including acquisitions under
          our existing agreements with the Berg Group;
     -    the annual distribution  requirements under the REIT provisions of the
          federal income tax laws; and
     -    such other factors as our board of directors deems relevant.

     We  cannot  assure  you that we will be able to meet or  maintain  our cash
distribution objectives.

OUR PROPERTIES COULD BE SUBJECT TO PROPERTY TAX REASSESSMENTS.

     We do not  believe  that our  acquisition  of  interests  in the  operating
partnerships  in July 1998 resulted in any statutory  changes in ownership  that
could  give  rise to a  reassessment  of any of the  properties  for  California
property tax purposes.  We cannot assure you, however,  that county assessors or
other tax administrative  agencies in California will not attempt to assert that
such a change occurred as a result of this transaction. Although we believe that
such a  challenge  would not be  successful  ultimately,  we cannot  assure  you
regarding the outcome of any related dispute or proceeding. A reassessment could
result in increased  real estate taxes on our  properties  that,  as a practical
matter,  we may be unable to pass  through to our  tenants  in full.  This could
reduce our net income and our funds  available  for  distribution  and cause our
stock price to fall.

OUR   OBLIGATION  TO  PURCHASE   TENDERED  O.P.  UNITS  COULD  REDUCE  OUR  CASH
DISTRIBUTIONS

     Each of the limited partners of the operating partnerships,  other than Mr.
Berg and his brother, Clyde J. Berg, has the annual right to cause the operating
partnerships  to purchase a portion of the  limited  partner's  O.P.  Units at a
purchase  price based on the average  market  value of the common  stock for the
ten-trading-day  period immediately preceding the date of tender. Upon a limited
partner's  exercise of any such right,  we will have the option to purchase  the
tendered O.P.  Units with available  cash,  borrowed funds or the proceeds of an
offering  of newly  issued  shares of common  stock.  These  put  rights  become
exercisable on December 29, 1999, and are available once a year for a maximum of
one-third of the eligible  limited  partners' total O.P. Units annually.  If the
total purchase  price of the O.P. Units tendered by all of the eligible  limited
partners in one year exceeds $1 million,  we or the operating  partnerships will
be entitled to reduce  proportionately  the number of O.P.  Units to be acquired
from each  tendering  limited  partner so that the total purchase price does not
exceed $1  million.  The  exercise  of these put rights may reduce the amount of
cash that we have  available to distribute to our  stockholders  and could cause
our stock price to fall.

     In addition,  after  December  1999, all O.P. Unit holders may tender their
O.P.  Units to us for  shares of common  stock at market  value or cash,  at our
election.  If we elect to pay cash for the  O.P.  Units,  our  liquidity  may be
reduced and we may lack  sufficient  funds to continue  paying the amount of our
anticipated or historical cash

                                     - 10 -

<PAGE>

distributions.  This could  cause our stock price to fall.  The  decision to pay
cash for  tendered  O.P.  Units is not  subject  to prior  determination  by the
independent directors committee.

SHARES  ELIGIBLE FOR FUTURE SALE COULD NOT AFFECT THE MARKET PRICE OF OUR COMMON
STOCK.

     We cannot predict the effect, if any, that future sales of shares of common
stock, or the  availability of shares for future sale,  could have on the market
price of the  common  stock.  Sales of  substantial  amounts  of  common  stock,
including  shares issued in connection  with the exercise of the exchange rights
held by the limited  partners of the operating  partnerships,  or the perception
that such sales could occur, could adversely affect prevailing market prices for
the common  stock.  Additional  shares of common  stock may be issued to limited
partners,  subject to the applicable REIT qualification ownership limit, if they
exchange  their O.P. Units for shares of common stock pursuant to their exchange
rights, or may be sold by us to raise funds required to purchase such O.P. Units
if the limited partners elect to tender O.P. Units to us using their put rights.
In addition,  as of May 10, 1999, current  stockholders may resell approximately
6.5  million  shares  of  common  stock  under  a  currently   effective  resale
prospectus.  Resale of these shares may adversely affect the market price of the
common stock. Subject to certain rights that we possess to halt offers and sales
of shares of common  stock  under that  prospectus,  we intend to  maintain  the
effectiveness with the Securities and Exchange Commission, or the Commission, of
the  registration  statement under which these shares are offered for sale until
the end of December 1999. In addition, the holders of 1,250,000 shares of common
stock that can be sold subject to Rule 144, including the volume limitation, can
resell those shares free of that limitation  under another  currently  effective
resale prospectus.

MARKET INTEREST RATES MAY REDUCE THE VALUE OF THE COMMON STOCK.

     One of the factors that investors consider important in deciding whether to
buy or sell  shares  of a REIT is the  distribution  rate on such  shares,  as a
percentage of the price of such shares,  relative to market  interest  rates. If
market interest rates go up, prospective  purchasers of REIT shares may expect a
higher distribution rate. Higher interest rates would not, however, increase the
funds  available for us to distribute,  and, in fact,  would likely increase our
borrowing costs and potentially decrease funds available for distribution. Thus,
higher  market  interest  rates  could  cause the price of our  common  stock to
fall.




                                     - 11 -

<PAGE>

                                 USE OF PROCEEDS

      The  Company  will not receive  any of the  proceeds  from the sale of the
shares by the selling stockholders.


                            THE SELLING STOCKHOLDERS

      The selling stockholders include all executive officers and directors,  as
defined in Rule 405 under the Securities  Act of 1933, as amended,  who exercise
options  to  purchase  shares  of  our  common  stock  under  this  registration
statement.

      The selling stockholders  also include Michael J. Anderson,  who served as
our Chief Operating Officer and Vice President and as a director from January 1,
1998 until his  resignation  on April 30, 1999.  On June 1, 1999,  Mr.  Anderson
beneficially  owned 167,917 shares of our common stock. Mr. Anderson is offering
167,917 shares of our common stock under this  prospectus.  If all of the shares
of  common  stock  offered  by Mr.  Anderson  are  sold  as  described  in  this
prospectus, Mr. Anderson would own no shares of our common stock.


                              PLAN OF DISTRIBUTION

      The selling stockholders may offer their shares at various times in one or
more of the following transactions:

     -    on any of the  United  States  securities  exchanges  where the common
          stock is listed and traded, including the AMEX and the PSE;

     -    in the over-the-counter market;

     -    in   transactions   other   than   on   such   exchanges   or  in  the
          over-the-counter market;

     -    in connection with short sales of the shares;

     -    by pledge to secure debts and other obligations;

     -    in connection with the writing of non-traded and exchange-traded  call
          options, in hedge transactions and in settlement of other transactions
          in standardized or over-the-counter options; or

     -    in a combination of any of the above transactions.

      The selling stockholders may sell their shares at market prices prevailing
at the time of sale, at prices  related to such  prevailing  market  prices,  at
negotiated prices or at fixed prices.

      The selling  stockholders may use  broker-dealers  to sell the shares.  If
this happens,  broker-dealers  will either receive discounts or commissions from
the selling  stockholders,  or they will receive  commissions from purchasers of
shares for whom they acted as agents.


                                  LEGAL MATTERS

      The validity of the shares of common stock offered by this prospectus will
be passed upon for us by  McCutchen,  Doyle,  Brown & Enersen  LLP. A partner of
McCutchen,  Doyle,  Brown & Enersen LLP,  who is  rendering  services to us with
respect to the  offering,  owns 12,333  shares of our common  stock.  McCutchen,
Doyle,

                                     - 12 -
<PAGE>


Brown &  Enersen  LLP will  rely on the  opinion  of  Ballard  Spahr  Andrews  &
Ingersoll, LLP, Baltimore, Maryland, as to certain matters of Maryland law.


                                     EXPERTS

      The consolidated financial statements as of December 31, 1998 incorporated
in this prospectus by reference to the Mission West Properties' Annual Report on
Form 10-K for the year ended  December  31,  1998 have been so  incorporated  in
reliance on the report of  PriceWaterhouseCoopers  LLP, independent accountants,
given on the authority of said firm as experts in auditing and accounting.


     DISCLOSURE OF COMMISSION POSITION ON INDEMNIFICATION FOR SECURITIES ACT
                                   LIABILITIES

      The  Maryland  general  corporation  law,  or  MGCL,  permits  a  Maryland
corporation to include in its charter a provision  limiting the liability of its
directors and officers to the corporation and its stockholders for money damages
except for liability resulting from (a) actual receipt of an improper benefit or
profit in money,  property or services;  or (b) active and deliberate dishonesty
established by a final  judgment as being  material to the cause of action.  Our
charter contains such a provision which eliminates such liability to the maximum
extent permitted by the MGCL.

      Our charter also authorizes us to the maximum extent permitted by Maryland
law to obligate itself to indemnify and to pay or reimburse  reasonable expenses
in  advance  of final  disposition  of a  proceeding  to any  present  or former
director or officer,  or any individual who, while a director of our corporation
and at our  request,  serves or has  served  another  corporation,  real  estate
investment trust,  partnership,  joint venture,  trust, employee benefit plan or
any  other  enterprise  as a  director,  officer,  partner  or  trustee  of such
corporation,  real estate investment trust,  partnership,  joint venture, trust,
employee  benefit  plan or  other  enterprise  from  and  against  any  claim or
liability to which such person may become subject or which such person may incur
by reason of his  status as a present  or  former  director  or  officer  of our
corporation. The bylaws obligate us, to the maximum extent permitted by Maryland
law, to  indemnify  and to pay or  reimburse  reasonable  expenses in advance of
final  disposition  of a  proceeding  to (i) any  present or former  director or
officer who is made a party to the  proceeding  by reason of his service in that
capacity or (ii) any individual  who, while a director of our corporation and at
our request,  serves or has served another  corporation,  real estate investment
trust,  partnership,  joint venture,  trust,  employee benefit plan or any other
enterprise as a director, officer, partner or trustee of such corporation,  real
estate investment trust,  partnership,  joint venture,  trust,  employee benefit
plan or other  enterprise and who is made a party to the proceeding by reason of
his service in that capacity. Our charter and bylaws also permit us to indemnify
and advance  expenses to any person who served a predecessor of our  corporation
in any of the  capacities  described  above  and any  employee  or  agent of our
corporation  or a  predecessor.  The MGCL  requires a  corporation  (unless  its
charter provides otherwise,  which our charter does not) to indemnify a director
or officer who has been successful,  on the merits or otherwise,  in the defense
of any  proceeding  to which he is made a party by reason of his service in that
capacity.  The MGCL permits a  corporation  to indemnify  its present and former
directors  and officers,  among others,  against  judgments,  penalties,  fines,
settlements and reasonable expenses actually incurred by them in connection with
any  proceeding  to which they may be made a party by reason of their service in
those or other capacities  unless it is established that (a) the act or omission
of the  director  or  officer  was  material  to the matter  giving  rise to the
proceeding  and (i) was  committed in bad faith or (ii) was the result of active
and  deliberate  dishonesty,  (b) the director or officer  actually  received an
improper  personal benefit in money,  property or services or (c) in the case of
any criminal proceeding, the director or officer had reasonable cause to believe
that the act or  omission  was  unlawful.  However,  under the MGCL,  a Maryland
corporation  may not  indemnify  for an adverse  judgment in a suit by or in the
right of the  corporation  or for a  judgment  of  liability  on the basis  that
personal benefit was improperly  received,  unless in either case a court orders
indemnification  and then only for  expenses.  In  addition,  the MGCL permits a
corporation  to advance  reasonable  expenses to a director or officer  upon the
corporation's receipt of (a) a written affirmation by the director or officer of
his good faith  belief  that he has met the

                                     - 13 -
<PAGE>

standard of conduct necessary for  indemnification  by the corporation and (b) a
written  undertaking  by him or on his  behalf  to  repay  the  amount  paid  or
reimbursed by the  corporation  if it shall  ultimately  be determined  that the
standard of conduct was not met.

      Insofar as  indemnification  for liabilities  arising under the Securities
Act of 1933 may be permitted to directors,  officers or persons  controlling the
registrant pursuant to the foregoing  provisions,  we have been informed that in
the opinion of the Securities and Exchange  Commission such  indemnification  is
against public policy as expressed in the Act and is therefore unenforceable.

                                     - 14 -

<PAGE>
                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS



ITEM 1.  PLAN INFORMATION*

ITEM 2.  REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION*

*    Information  required  by  Part  I to be  contained  in the  section  10(a)
     prospectus is omitted from this  Registration  Statement in accordance with
     Rule 428 under the Securities Act of 1933, as amended (the "1933 Act"), and
     the Note to Part I of Form S-8. PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT



ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

      The following  documents filed with the Securities and Exchange Commission
by Mission West  Properties,  Inc., a Maryland  corporation,  or its predecessor
Mission  West   Properties,   a  California   corporation  (the  "Company")  are
incorporated by reference in this registration statement:

     1. Our  Annual  Report  on Form 10-K for the  fiscal  year  ended  December
31,1998

     2. The Form S-4  Registration  Statement filed on May 15, 1998 and declared
effective on November 23, 1998 (Registration No. 333-52835-99)(the "Registration
Statement")  and the  prospectus  dated November 23, 1998 filed pursuant to Rule
424(b).

     3. All reports filed pursuant to Section 13(a) or 15(d) of the Exchange Act
since December 31, 1998.

     4.  The  description  of  capital  stock  contained  in  the   Registration
Statement.

      All documents filed by the Company  pursuant to Sections 13(a),  13(c), 14
or  15(d)  of the  Securities  Exchange  Act of  1934  after  the  date  of this
registration  statement  and prior to the filing of a  post-effective  amendment
which indicates that all securities  offered have been sold or which deregisters
all securities then remaining unsold, are deemed to be incorporated by reference
into this  registration  statement  and to be a part hereof from the  respective
dates of filing of such documents.  Any statement contained in this registration
statement or in a document incorporated by reference shall be deemed modified or
superseded to the extent that a statement  contained in any  subsequently  filed
document which also is or is deemed to be  incorporated  by reference  herein or
therein  modifies or  supersedes  such  statement.  Any statement so modified or
superseded  shall  not be  deemed  to  constitute  a part  hereof,  except as so
modified or superseded.

ITEM 4.  DESCRIPTION OF SECURITIES.

      Not Applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

     A partner of McCutchen, Doyle, Brown & Enersen, LLP, counsel to the Company
in  connection  with this  registration  statement,  owns  12,333  shares of the
Company's Common Stock.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

      See "Disclosure of Commission  Position on Indemnification  for Securities
Act Liabilities" in the Prospectus.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

     The  restricted  securities  to be  reoffered  or resold  pursuant  to this
registration  statement  consist of stock  options  and  shares of common  stock
purchased  on  exercise  of stock  options  granted to  executive  officers  and
non-employee  directors of the Company  under the 1997 Stock  Option  Plan.  The
securities  were issued  pursuant to the exemption  from  registration  provided
under Section 4(2) of the Securities Act following board of director approval of
the option grant and the  commencement  of  employment  in the case of executive
officers, and, in the case of the directors,  automatically upon the election or
appointment to the position

ITEM 8.  EXHIBITS.

      See Exhibit Index which is incorporated herein by reference.

ITEM 9.  UNDERTAKINGS.

      The undersigned registrant hereby undertakes:

      (1) To file,  during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:

           (i)  To include any prospectus required by Section 10(a)(3) of the
      Securities Act of 1933;

           (ii) To reflect in the  prospectus  any facts or events arising after
      the  effective  date of the  registration  statement  (or the most  recent
      post-effective amendment thereof) which, individually or in the aggregate,
      represent  a  fundamental  change  in the  information  set  forth  in the
      registration  statement.  Notwithstanding  the foregoing,  any increase or
      decrease in volume of  securities  offered (if the total  dollar  value of
      securities  offered  would not exceed that which was  registered)  and any
      deviation from the low or high end of the estimated maximum offering range
      may be  reflected  in the form of  prospectus  filed  with the  Commission
      pursuant  to Rule 424(b) if, in the  aggregate,  the changes in volume and
      price represent no more than a 20 percent change in the maximum  aggregate
      offering price set forth in the "Calculation of Registration Fee" table in
      the effective registration statement;

           (iii) To include any material information with respect to the plan of
      distribution not previously disclosed in the registration statement or any
      material change to such information in the registration statement,

provided,  however,  that  subparagraphs  (i)  and  (ii)  do  not  apply  if the
registration statement is on Form S-3, Form S-8 or Form F-3, and the information
required to be included in a  post-effective  amendment by those  paragraphs  is
contained in periodic  reports filed with or furnished to the  Commission by the
registrant  pursuant to Section 13 or 15(d) of the  Securities  Exchange  Act of
1934 that are incorporated by reference in the registration statement.

      (2)  That,  for  the  purpose  of  determining  any  liability  under  the
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such  securities at that time shall be deemed to be the initial BONA
FIDE offering thereof.

      (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

      The  undersigned  registrant  hereby  undertakes  that,  for  purposes  of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 (and, where applicable,  each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the  registration  statement shall be
deemed to be a new  registration  statement  relating to the securities  offered
therein,  and the offering of such securities at that time shall be deemed to be
the initial BONA FIDE offering thereof.

      Insofar as  indemnification  for liabilities  arising under the Securities
Act of 1933 may be permitted to directors,  officers and controlling  persons of
the  registrant  pursuant  to  the  foregoing  provisions,   or  otherwise,  the
registrant  has been advised that in the opinion of the  Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against such  liabilities  (other than the payment by the registrant of expenses
incurred or paid by a director,  officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.



<PAGE>


                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-8 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of Cupertino, State of California on June 2, 1999.

                               MISSION WEST PROPERTIES, INC.



                               BY: /s/ Carl E. Berg
                                  Carl E. Berg
                                  Chairman of the Board, Chief Executive
                                  Officer and President

     KNOW ALL  PERSONS  BY THESE  PRESENTS,  that each  person  whose  signature
appears  below  constitutes  and  appoints  Carl  E.  Berg  with  the  power  of
substitution,  his or her  attorney-in-fact,  to  sign  any  amendments  to this
Registration  Statement and to file the same,  with  exhibits  thereto and other
documents in connection therewith,  with the Securities and Exchange Commission,
hereby ratifying and confirming all that each of said  attorney-in-fact,  or his
or her substitute, may do or choose to be done by virtue hereof.

Pursuant to the  requirements of the Securities Act of 1933,  this  registration
statement  has been  signed  below by the  following  persons in the  capacities
indicated, effective June 8, 1999.

SIGNATURE                       TITLE
- ---------                       -----


/s/ Carl E. Berg
________________________        Chairman of the Board, Chief Executive
Carl E. Berg                    Officer, President, and Chief Financial
                                Officer and Director

/s/ Marianne K. Aguiar
________________________        Vice President of Finance and Controller
Marianne K. Aguiar


/s/ William A. Hasler
________________________        Director
William A. Hasler


/s/ Lawrence B. Helzel
________________________        Director
Lawrence B. Helzel










<PAGE>




                                  EXHIBIT INDEX



EXHIBIT NUMBER   EXHIBIT DESCRIPTION
4.1*             Articles of Amendment and Restatement
4.2*             Bylaws
4.3**            Mission West Properties 1997 Stock Option Plan
5.1              Opinion of McCutchen, Doyle, Brown & Enersen, LLP
5.2              Opinion of Ballard, Spahr, Andrews & Ingersoll, LLP
23.1             Consent of McCutchen, Doyle, Brown & Enersen, LLP (included in
                 Exhibit 5.1)
23.2             Consent of Ballard, Spahr, Andrews & Ingersoll, LLP (included
                 in Exhibit 5.2)
23.3             Consent of PricewaterhouseCoopers LLP
23.4             Consent of PricewaterhouseCoopers LLP
24.1             Powers of Attorney (included on the signature page
                 hereto)

*Incorporated by reference to Amendment No. 4 to the Company's Form S-4
Registration Statement filed with the Securities and Exchange Commission on
November 20, 1998.

**Incorporated by reference to the Company's  Schedule 14A Proxy Statement filed
with the Securities and Exchange Commission on October 21, 1997.



May 28, 1999





Mission West Properties, Inc.
10050 Bandley Drive
Cupertino, California  95014



                            Registration on Form S-8



Dear Ladies and Gentlemen:

         We have acted as counsel to Mission West  Properties,  Inc., a Maryland
corporation  (the "Company"),  in connection with its Registration  Statement on
Form S-8 of up to 5,485,000  shares of common stock,  par value $0.001 per share
(the "Common  Stock")  issuable  under the  Company's  Amended and Restated 1997
Stock Option Plan (the "Plan").

         In this regard, we have examined such documents, records and matters of
law as we have  considered  relevant  to this  opinion.  As to  certain  factual
matters we deem relevant to this opinion,  we have relied upon a certificate  of
officers of the Company and have not sought to independently  verify the matters
stated therein.  As to matters of Maryland law, we have relied on the opinion of
Ballard, Spahr, Andrews & Ingersoll, LLP.

         Based upon the foregoing,  it is our opinion that the 5,485,000  shares
of Common  Stock when issued under the Plan will be validly  issued,  fully paid
and non-assessable, and no personal liability will attach to the holders of such
shares by reason of the ownership thereof.

         This  opinion  is  rendered  solely  to  you  in  connection  with  the
registration of the shares of Common Stock under the Registration Statement.

         We consent to being named as counsel to the Company in the registration
statement and to the inclusion of a copy of this opinion letter as an exhibit to
the registration statement.  In giving this consent,  however, we do not thereby
admit that we are an "expert"  within the meaning of the Securities Act of 1933,
as amended.

<PAGE>
Mission West Properties, Inc.
May 28, 1999
Page 2



                              Very truly yours,

                              McCUTCHEN, DOYLE, BROWN & ENERSEN, LLP



                              By:
                                       __________________________________
                                       Alan B. Kalin
                                       A Member of the Firm





                                                    May 28, 1999



Mission West Properties, Inc.
10050 Bandley Drive
Cupertino, California 95014

                    Re: Registration Statement on Form S-8
                        Registration No. 333-

Ladies and Gentlemen:

     We have served as Maryland  counsel to Mission  West  Properties,  Inc.,  a
Maryland  corporation  (the  "Company"),  in connection  with certain matters of
Maryland law arising out of the  registration  of up to 5,485,000  shares of the
Company's  Common Stock,  par value $.001 per share (the "Shares"),  offered for
sale to  participants  who hold  options  granted  or to be  granted  under  the
Company's 1997 Stock Option Plan (the "Plan"),  covered by the  above-referenced
registration  statement  on Form S-8(the  "Registration  Statement"),  under the
Securities Act of 1933, as amended (the "1933 Act").  Capitalized terms used but
not defined  herein  shall have the meanings  given to them in the  Registration
Statement.

     In connection with our  representation  of the Company,  and as a basis for
the  opinion  hereinafter  set  forth,  we have  examined  originals,  or copies
certified  or  otherwise  identified  to  our  satisfaction,  of  the  following
documents (hereinafter collectively referred to as the "Documents"):

     1. The Registration  Statement,  including all amendments thereto, with the
prospectus deemed included therein (the  "Prospectus"),  in the form in which it
was  transmitted to the Securities and Exchange  Commission  (the  "Commission")
under the 1933 Act;



<PAGE>



     2. The charter of the Company  (the  "Charter"),  certified  as of a recent
date by the State  Department  of  Assessments  and  Taxation of  Maryland  (the
"SDAT");

     3. The Bylaws of the Company (the "Bylaws"),  certified as of a recent date
by an officer of the Company;

     4. Resolutions (the "Resolutions") adopted by the Board of Directors of the
Company, relating to (i) the adoption of the Plan and the issuance of the Shares
pursuant to the Plan and (ii) the registration of the Shares,  certified as of a
recent date by an officer of the Company;

     5. The Plan, certified as of a recent date by an officer of the Company;

     6. A certificate of the SDAT as to the good standing of the Company,  dated
as of a recent date; and

     7 A certificate executed by an officer of the Company, dated as of the date
hereof; and

     8.  Such  other  documents  and  matters  as we have  deemed  necessary  or
appropriate  to express  the opinion  set forth in this  letter,  subject to the
assumptions, limitations and qualifications stated herein.

     In expressing the opinion set forth below,  we have assumed,  and so far as
is known to us there are no facts inconsistent with, the following:

     1. Each  individual  executing any of the  Documents,  whether on behalf of
such individual or another person, is legally competent to do so.

     2. Each  individual  executing  any of the  Documents  on behalf of a party
(other than the Company) is duly authorized to do so.

     3.  Each of the  parties  (other  than the  Company)  executing  any of the
Documents has duly and validly  executed and delivered  each of the Documents to
which such party is a signatory,  and such party's obligations set forth therein
are legal,  valid and binding and are  enforceable in accordance with all stated
terms.



<PAGE>

Mission West Properties, Inc.
May 28, 1999
Page 3


     4. All Documents  submitted to us as originals are authentic.  The form and
content of the Documents  submitted to us as unexecuted  drafts do not differ in
any respect relevant to this opinion from the form and content of such Documents
as executed  and  delivered.  All  Documents  submitted  to us as  certified  or
photostatic copies conform to the original documents. All signatures on all such
Documents are genuine.  All public  records  reviewed or relied upon by us or on
our behalf are true and complete.  All statements and  information  contained in
the  Documents  are  true  and  complete.  There  has  been no  oral or  written
modification or amendment to any of the Documents,  and there has been no waiver
of any provision of any of the  Documents,  by action or omission of the parties
or otherwise.

     5. The  Shares  have not been and will not be  issued in  violation  of any
restriction or limitation contained in the Charter.

     The  phrase  "known to us" is  limited  to the  actual  knowledge,  without
independent  inquiry,  of the  lawyers  at our  firm who  have  performed  legal
services in connection with the issuance of this opinion.

     Based upon the foregoing,  and subject to the assumptions,  limitations and
qualifications stated herein, it is our opinion that:

     1. The Company is a corporation duly incorporated and existing under and by
virtue of the laws of the State of  Maryland  and is in good  standing  with the
SDAT.

     2. The  issuance  of the Shares has been duly  authorized,  and the Shares,
when  sold  and  delivered  against  payment  therefor  in  accordance  with the
Resolutions,  the Plan and the Prospectus  (assuming  that,  upon issuance,  the
total number of shares of Common Stock  issued and  outstanding  will not exceed
the total number of shares of Common  Stock that the Company is then  authorized
to  issue  under  the  Charter),   will  be  validly  issued,   fully  paid  and
nonassessable.



<PAGE>

Mission West Properties, Inc.
May 28, 1999
Page 4


     The foregoing  opinion is limited to the  substantive  laws of the State of
Maryland and we do not express any opinion  herein  concerning any other law. We
express  no opinion as to the  applicability  or effect of any  federal or state
securities laws,  including the securities laws of the State of Maryland,  or as
to federal or state laws regarding fraudulent transfers.  To the extent that any
matter as to which our  opinion is  expressed  herein  would be  governed by any
jurisdiction other than the State of Maryland,  we do not express any opinion on
such matter.

     We assume no obligation to supplement  this opinion if any  applicable  law
changes  after  the date  hereof or if we  become  aware of any fact that  might
change the opinion expressed herein after the date hereof.

     This opinion is being  furnished to you for submission to the Commission as
an exhibit to the  Registration  Statement and,  accordingly,  may not be relied
upon by,  quoted in any manner to, or  delivered  to any other  person or entity
(other than  McCutchen,  Doyle,  Brown & Enersen,  LLP,  counsel to the Company)
without, in each instance, our prior written consent.

     We hereby  consent  to the  filing of this  opinion  as an  exhibit  to the
Registration Statement and to the use of the name of our firm therein. In giving
this  consent,  we do not admit that we are within the category of persons whose
consent is required by Section 7 of the 1933 Act.


                                    Very truly yours,




                       CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use of this  Registration  Statement on Form S-8 of our
reports  dated  January 29, 1999,  on our audits of the  consolidated  financial
statements and financial statement schedule of Mission West Properties,  Inc. as
of  December  31,  1998 and 1997,  and for the years ended  December  31,  1998,
November  30, 1997 and 1996 and the one month  period  ended  December 31, 1997,
which  appear  in  such   Registration   Statement.   We  also  consent  to  the
incorporation by reference in the Post-Effective  Amendment No. 1 to Form S-4 on
Form S-3  (File No.  333-52835-99)  and Form S-3  (File  No.  333-41203)  of our
reports  dated  January 29, 1999,  on our audits of the  consolidated  financial
statements and financial statement schedule of Mission West Properties,  Inc. as
of  December  31,  1998 and 1997,  and for the years ended  December  31,  1998,
November  30, 1997 and 1996 and the one month  period  ended  December 31, 1997,
which appear in such Registration Statements.


San Francisco, California               /s/ PricewaterhouseCoopers LLP
June 9, 1999



                       CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use in this  Registration  Statement on Form S-8 of our
reports  dated  January  29,  1999,  on our  audits  of the  combined  financial
statements of the Berg Properties (Predecessor) as of June 30, 1998 and December
31,  1997,  and for the six months ended June 30, 1998 and each of the two years
ended December 31, 1997, which appear in such  Registration  Statement.  We also
consent to the incorporation by reference in the Post-Effective  Amendment No. 1
to Form  S-4 on Form  S-3  (File  No.  333-52835-99)  and  Form  S-3  (File  No.
333-41203)  of our reports dated January 29, 1999, on our audits of the combined
financial statements of the Berg Properties (Predecessor) as of June 30,1998 and
December  31,  1997,  and for the six months ended June 30, 1998 and each of the
two years ended December 31, 1997, which appear in such Registration Statements.


San Francisco, California               /s/ PricewaterhouseCoopers LLP
June 9, 1999




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