UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

       Date of report (date of earliest event reported): October 19, 2005

                          MISSION WEST PROPERTIES, INC.
             (Exact name of registrant as specified in its charter)

         Maryland               Commission File Number:            95-2635431
         --------                       1-8383                     ----------
(State or other jurisdiction                                    (I.R.S. Employer
      of incorporation)                                          Identification)


                    10050 Bandley Drive, Cupertino, CA 95014
                    (Address of principal executive offices)

                                 (408) 725-0700
              (Registrant's telephone number, including area code)





ITEM 2.02.    RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

(a)  The following information is being furnished by the Company as required for
     Item  2.02(a)  of this  report  and shall not be deemed to be  "filed"  for
     purposes of Section 18 of the Securities Exchange Act of 1934:

On October 19, 2005, the Company issued a press release  announcing its earnings
results for the quarter ended  September 30, 2005. The press release is attached
to this  Current  Report as Exhibit  99.1 and is  incorporated  by  reference in
response to Item 2.02(a) of this report.








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

                                    SIGNATURE

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has  duly  caused  this  report  to be filed  on its  behalf  by the
undersigned hereunto duly authorized.




                                        MISSION WEST PROPERTIES, INC.

Date: October 20, 2005                  By: /s/ Wayne N. Pham
                                        ----------------------------------------
                                        Wayne N. Pham
                                        Vice President of Finance and Controller





EXHIBIT 99.1


                                                                  PRESS RELEASE

For Immediate News Release
October 19, 2005

     MISSION WEST PROPERTIES ANNOUNCES THIRD QUARTER 2005 OPERATING RESULTS

  "We build the buildings for the high tech companies that build the internet"


Cupertino,  CA - Mission West Properties,  Inc.  (AMEX/PCX:  MSW) reported today
that Funds From Operations  ("FFO") for the quarter ended September 30, 2005 was
$18,528,000 or $0.18 per diluted common share  (considering the potential effect
of all O.P. units being  exchanged for shares of the Company's  common stock) as
compared to $24,519,000 or $0.23 per diluted common share for the same period in
2004. On a sequential  quarter  basis,  FFO per diluted  common share  decreased
$0.02  compared to the  previous  quarter  ended June 30, 2005.  Settlements  of
former tenant breach of lease and termination  fees accounted for  approximately
$0.02 per diluted share in the second  quarter  2005.  For the nine months ended
September 30, 2005, FFO decreased to $59,977,000 or $0.57 per diluted share from
FFO of $80,338,000 or $0.77 per diluted share for the same period in 2004.

Net income to common  stockholders  per diluted  share was $0.13 for the quarter
ended  September  30, 2005  compared to $0.18 for the same period in 2004, a per
share decrease of  approximately  27.8%. For the nine months ended September 30,
2005, net income to common  stockholders per diluted share was $0.41,  down from
$0.58 one year ago, a per share decrease of approximately 29.3%.

FINANCING ACTIVITY

In July 2005, the Company  obtained a $125 million  secured fully  amortizing 20
year  mortgage  loan from Allianz Life  Insurance  Company of North America that
bears annual fixed interest rate of 5.22%. The mortgage loan is secured by eight
properties.  The Company paid approximately  $838,000 in loan fees and financing
costs and used the proceeds to primarily  pay off  short-term  debt and the Berg
Group line of credit.

DISPOSITION ACTIVITY

In October 2005,  the Company  completed the sale of a 239,000  rentable  square
foot  R&D  property  at 800  Embedded  Way,  San  Jose,  California.  A gain  of
approximately  $0.8  million  will be realized on the total sales price of $15.1
million.

COMPANY PROFILE

Mission West Properties, Inc. operates as a self-managed,  self-administered and
fully integrated REIT engaged in the management, leasing, marketing, development
and acquisition of commercial R&D properties,  primarily  located in the Silicon
Valley portion of the San Francisco Bay Area. Currently, the Company manages 107
properties  totaling  approximately  7.8 million  square  feet.  For  additional
information, please contact Investor Relations at 408-725-0700.

The matters described herein contain forward-looking statements. Such statements
can be  identified  by the use of  forward-looking  terminology  such as "will",
"anticipate", "estimate", "expect", "intends", or similar words. Forward-looking
statements involve a number of risks,  uncertainties or other factors beyond the
Company's  control,  which may cause  material  differences  in actual  results,
performance or other  expectations.  These factors include,  but are not limited
to, the ability to complete  acquisitions  under the Berg Land  Holdings  Option
Agreement  with the Berg  Group  and other  factors  detailed  in the  Company's
registration  statements,  and periodic  filings with the  Securities & Exchange
Commission.





                          MISSION WEST PROPERTIES, INC.
                             SELECTED FINANCIAL DATA
        (In thousands, except share, per share and property data amounts)





                                                   Three Months        Three Months      Nine Months       Nine Months
                                                      Ended               Ended             Ended             Ended
                                                  Sept 30, 2005       Sept 30, 2004     Sept 30, 2005     Sept 30, 2004
                                                 -----------------    ---------------   ---------------   ---------------
REVENUES:
                                                                                                
Rental revenue from real estate                     $24,692 (1)          $29,494 (1)       $76,043 (1)        $ 90,526 (1)
Tenant reimbursements                                 4,031                3,740            11,254              11,623
Other income, including lease terminations,
     settlements and interest                           426                  396             3,018               5,401
                                                 -----------------    ---------------   ---------------   ---------------
  Total revenues                                     29,149               33,630            90,315             107,550
                                                 -----------------    ---------------   ---------------   ---------------
EXPENSES:
Operating expenses                                    2,497                2,246             6,635               6,877
Real estate taxes                                     2,804                2,559             7,466               8,364
Interest                                              5,494                4,468            16,046              13,051
Interest (related parties)                              229                  256               779                 760
General and administrative                              424                  395             1,542               1,628
Depreciation and amortization of real estate          5,268 (2)            5,269 (2)        16,005 (2)          16,168 (2)
                                                 -----------------    ---------------   ---------------   ---------------
  Total expenses                                     16,716               15,193            48,473              46,848
                                                 -----------------    ---------------   ---------------   ---------------
Income before equity in earnings of unconsolidated
     joint venture and minority interests            12,433               18,437            41,842              60,702
Equity in earnings of unconsolidated joint venture      291                  345               677               1,564

Minority interests                                  (10,551)             (15,590)          (35,172)            (51,757)
                                                 -----------------    ---------------   ---------------   ---------------
   Income from continuing operations                  2,173                3,192             7,347              10,509
                                                 -----------------    ---------------   ---------------   ---------------

Discontinued operations, net of minority interests:
  Gain from disposal of discontinued operations         291                    -               305                   -
  (Loss)/income from discontinued operations            (13)                 (19)              (98)                (18)
                                                 -----------------    ---------------   ---------------   ---------------
Income from discontinued operations                     278                 (19)               207                 (18)
                                                 -----------------    ---------------   ---------------   ---------------
Net income to common stockholders                    $2,451               $3,173            $7,554             $10,491
                                                 =================    ===============   ===============   ===============
Net income to minority interests                    $11,541              $15,488           $35,823             $51,596
                                                 =================    ===============   ===============   ===============
Income per share from continuing operations:
   Basic                                              $0.12                $0.18             $0.40               $0.58
   Diluted                                            $0.12                $0.18             $0.40               $0.58
Income per share from discontinued operations:
   Basic                                              $0.01                    -             $0.01                   -
   Diluted                                            $0.01                    -             $0.01                   -
                                                 -----------------    ---------------   ---------------   ---------------
Net income per share to common stockholders:
   Basic                                              $0.13                $0.18             $0.41               $0.58
                                                 =================    ===============   ===============   ===============
   Diluted                                            $0.13                $0.18             $0.41               $0.58
                                                                                        ===============   ===============
Weighted average shares of common stock (basic)     18,356,278           18,071,484        18,242,495        18,019,277
                                                 =================    ===============   ===============   ===============
Weighted average shares of common stock (diluted)   18,407,891           18,098,174        18,289,699        18,077,854
                                                 =================    ===============   ===============   ===============
Weighted average O.P. units outstanding             86,169,195           86,410,402        86,254,519        86,459,617
                                                 =================    ===============   ===============   ===============

FUNDS FROM OPERATIONS
Funds from operations                               $18,528              $24,519           $59,977          $80,338
                                                 =================    ===============   ===============   ===============
Funds from operations per share (3)                  $ 0.18               $ 0.23            $ 0.57           $ 0.77
                                                 =================    ===============   ===============   ===============
Outstanding common stock                            18,367,691           18,077,191        18,367,691        18,077,191
                                                 =================    ===============   ===============   ===============
Outstanding O.P. units                              86,169,195           86,404,695        86,169,195        86,404,695
                                                 =================    ===============   ===============   ===============
Weighted average O.P. units and common stock
   outstanding (diluted)                           104,577,086          104,508,576       104,544,218       104,537,470
                                                 =================    ===============   ===============   ===============







                                                   Three Months        Three Months      Nine Months       Nine Months
FUNDS FROM OPERATIONS CALCULATION                     Ended               Ended             Ended             Ended
                                                  Sept 30, 2005       Sept 30, 2004     Sept 30, 2005     Sept 30, 2004
                                                 -----------------    ---------------   ---------------   ---------------
                                                                                                  
Net income                                          $ 2,451              $ 3,173          $  7,554             $10,491
Add:
   Minority interests (4)                            11,414               15,377            35,441              51,228
   Depreciation and amortization of real estate
from                                                  5,721                5,592            17,301              17,488
     continuing operations
   Depreciation and amortization of real estate
from                                                     77                  159               315                 476
     discontinued operations
   Depreciation & amortization of real estate
held in                                                 210                  218               774                 655
     unconsolidated joint venture
Less:
   Gain on sale of real estate                       (1,345)                   -            (1,408)                  -
                                                 -----------------    ---------------   ---------------   ---------------
Funds from operations                               $18,528              $24,519           $59,977             $80,338
                                                 =================    ===============   ===============   ===============


Funds From Operations ("FFO") is a non-GAAP  financial  measurement used by real
estate investment trusts ("REITs") to measure and compare operating performance.
As defined by NAREIT,  FFO represents net income (loss) before minority interest
of unit  holders  (computed  in  accordance  with  GAAP,  accounting  principles
generally accepted in the United States of America), excluding gains (or losses)
from  debt  restructuring  and  sales of  property,  plus  real  estate  related
depreciation  and  amortization  (excluding  amortization of deferred  financing
costs and  depreciation  of non-real  estate assets) and after  adjustments  for
unconsolidated  partnerships and joint ventures.  Management considers FFO to be
an  appropriate  supplemental  measure of the Company's  operating and financial
performance  because  when  compared  year over year,  it reflects the impact to
operations  from trends in  occupancy  rates,  rental  rates,  operating  costs,
general and administrative  expenses and interest costs, providing a perspective
not immediately apparent from net income. In addition,  management believes that
FFO provides useful information about the Company's  financial  performance when
compared  to other  REITs  since FFO is  generally  recognized  as the  industry
standard for reporting the operations of REITs.  FFO should not be considered as
an alternative for net income as a measure of  profitability or is it comparable
to cash flows  provided by operating  activities  determined in accordance  with
GAAP. FFO is not comparable to similarly  entitled items reported by other REITs
that do not define them exactly as we define FFO.



                                                   Three Months       Three Months      Nine Months         Nine Months
                                                       Ended             Ended             Ended               Ended
PROPERTY AND OTHER DATA:                           Sept 30, 2005     Sept 30, 2004     Sept 30, 2005       Sept 30, 2004
                                                  ---------------   ---------------   -----------------   ---------------
                                                                                                
Total properties, end of period                            107               109                 107               109
Total square feet, end of period                     7,780,082         7,917,262           7,780,082         7,917,262
Average monthly rental revenue per square foot (5)       $1.57             $1.81               $1.56             $1.79
Average occupancy                                         67.5%             69.2%               68.3%             72.2%
Actual occupancy                                          67.5%             69.0%               67.5%             69.0%
Straight-line rent                                       ($ 99)             $289              $  791            $  141
Leasing commissions                                       $ 37              $216              $3,990            $1,391
Capital expenditures                                      $234              $  1              $  871            $  371







BALANCE SHEET                                 September 30, 2005     December 31, 2004
                                              --------------------  --------------------
Assets:
                                                                  
Land                                               $ 273,933             $ 273,663
Buildings and improvements                           766,209               770,757
Real estate related intangible assets                 17,410                18,284
                                              --------------------  --------------------
   Total investments in properties                 1,057,552             1,062,704
Less accumulated depreciation and                   (124,670)             (110,062)
amortization
Assets held for sale, net of accumulated
     depreciation of $1,770 and $1,578 at 9/30/05
     and 12/31/04, respectively                       14,245                8,221
                                              --------------------  --------------------
   Net investments in properties                     947,127               960,863
Cash and cash equivalents                             40,443                 1,519
Restricted cash                                        1,551                 1,551
Deferred rent receivable                              19,302                18,511
Investment in unconsolidated joint venture             3,472                 3,559
Other assets                                          24,812                19,653
                                              --------------------  --------------------
   Total assets                                   $1,036,707            $1,005,656
                                              ====================  ====================

Liabilities:
Mortgage notes payable                             $ 359,891             $ 292,822
Mortgage notes payable - related parties              10,146                10,420
Line of credit - related parties                           -                 9,560
Revolving line of credit                                   -                24,208
Interest payable                                         327                   327
Security deposits                                      8,434                 8,544
Deferred rental income                                11,691                11,038
Liabilities related to assets held for sale               80                    14
Dividend/distribution payable                         16,727                16,718
Accounts payable and accrued expenses                 10,971                 6,704
                                              --------------------  --------------------
   Total liabilities                                 418,267               380,355

Minority interests                                   503,769               512,089

Stockholders' equity:
Common stock, $.001 par value                             18                    18
Paid in capital                                      137,217               134,539
Accumulated deficit                                  (22,564)              (21,345)
                                              --------------------  --------------------
   Total stockholders' equity                        114,671               113,212
                                              --------------------  --------------------
   Total liabilities and stockholders' equity     $1,036,707            $1,005,656
                                              ====================  ====================



(1)  Includes  approximately  $472 in amortization  expense for the three months
     ended September 30, 2005 and 2004 and approximately  $1,416 in amortization
     expense  for the nine  months  ended  September  30,  2005 and 2004 for the
     amortization of the  above-market  lease  intangible asset of the San Tomas
     Technology Park acquisition  pursuant to Statement of Financial  Accounting
     Standard No. 141, "Business Combinations."

(2)  Includes  approximately $321 and $440 in amortization expense for the three
     months ended September 30, 2005 and 2004,  respectively,  and approximately
     $1,122  and  $1,732  in  amortization  expense  for the nine  months  ended
     September 30, 2005 and 2004, respectively, for the amortization of in-place
     lease  value of the San  Tomas  Technology  Park  acquisition  pursuant  to
     Statement   of   Financial   Accounting   Standard   No.   141,   "Business
     Combinations."

(3)  Calculated  on a fully diluted  basis.  Assumes  conversion  of O.P.  units
     outstanding into the Company's common stock.

(4)  The  minority  interest  for third  parties  has been  deducted  from total
     minority interest in calculating FFO.

(5)  Average  monthly  rental  revenue  per square foot has been  determined  by
     taking the cash base rent for the period divided by the number of months in
     the period,  and then  divided by the average  occupied  square feet in the
     period.