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 23, 2006

                          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)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):


[ ]  Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

                                     - 1 -




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 23, 2006, the Company issued a press release  announcing its earnings
results for the third  quarter ended  September  30, 2006.  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  signed  on its  behalf by the
undersigned hereunto duly authorized.




                                     MISSION WEST PROPERTIES, INC.

Date: October 23, 2006               By: /s/ Wayne N. Pham
                                        --------------------------------------
                                        Wayne N. Pham
                                        Vice President of Finance and Controller

                                     - 2 -



Exhibit 99.1


                                                                  PRESS RELEASE

For Immediate News Release
October 23, 2006


     MISSION WEST PROPERTIES ANNOUNCES THIRD QUARTER 2006 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, 2006 was
$16,567,000 or $0.16 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 $18,528,000 or $0.18 per diluted common share for the same period in
2005. On a sequential quarter basis, FFO for the quarter ended June 30, 2006 was
$0.16 per diluted  common share.  For the nine months ended  September 30, 2006,
FFO  increased  to  $68,047,000  or $0.65 per diluted  common  share from FFO of
$59,977,000  or $0.57 per  diluted  common  share  for the same  period in 2005.
Excluding  termination fees and security deposit  forfeitures  relating to lease
terminations,  FFO for the nine  months  ended  September  30, 2006 and 2005 was
$0.50 and $0.55 per diluted common share, respectively.

Net income per diluted  share to common  stockholders  was $0.11 for the quarter
ended  September 30, 2006 compared to $0.13 for the quarter ended  September 30,
2005, a per share  decrease of  approximately  15.4%.  For the nine months ended
September  30, 2006,  net income per diluted  share to common  stockholders  was
$0.49, up from $0.41 one year ago, a per share increase of approximately  19.5%.
Excluding  termination fees and security deposit  forfeitures  relating to lease
terminations,  net income per diluted share to common  stockholders for the nine
months ended September 30, 2006 and 2005 was $0.34 and $0.39, respectively.

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 110
properties  totaling   approximately  7.9  million  rentable  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.

                                     - 3 -



                          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, 2006       Sept 30, 2005     Sept 30, 2006     Sept 30, 2005
                                                 -----------------    ---------------   ---------------   ---------------
REVENUES:
                                                                                              
Rental revenue from real estate                     $22,362 (1)          $24,692 (1)       $69,005 (1)      $76,043 (1)

Tenant reimbursements                                 3,311                4,031             9,686           11,254
Lease termination income                                  -                    -            16,068              478
Other income, including interest                      1,068                  426             2,890            2,540
                                                 -----------------    ---------------   ---------------   ---------------
  Total revenues                                     26,741               29,149            97,649           90,315
                                                 -----------------    ---------------   ---------------   ---------------
EXPENSES:
Operating expenses                                    2,253                2,497             6,345            6,635
Real estate taxes                                     2,921                2,804             7,821            7,466
Interest                                              5,172                5,494            15,580           16,046
Interest (related parties)                              188                  229               569              779
General and administrative                              531                  424             1,803            1,542
Depreciation and amortization of real estate          5,727 (2)            5,268 (2)        16,632 (2)       16,005 (2)
                                                 -----------------    ---------------   ---------------   ---------------
  Total expenses                                     16,792               16,716            48,750           48,473
                                                 -----------------    ---------------   ---------------   ---------------
Income before equity in earnings of unconsolidated
   joint venture and minority interests               9,949               12,433            48,899           41,842
Equity in earnings of unconsolidated joint venture      857                  291             1,538              677
Minority interests                                   (8,700)             (10,551)          (41,057)         (35,172)
                                                 -----------------    ---------------   ---------------   ---------------
   Income from continuing operations                  2,106                2,173             9,380            7,347
                                                 -----------------    ---------------   ---------------   ---------------

Discontinued operations, net of minority interests:
  Gain from disposal of discontinued operations           -                  291                 -              305
  Loss from discontinued operations                       -                  (13)                -              (98)
                                                 -----------------    ---------------   ---------------   ---------------
(Loss)/income from discontinued operations                -                  278                 -              207

                                                 -----------------    ---------------   ---------------   ---------------
Net income to common stockholders                    $2,106               $2,451            $9,380           $7,554
                                                 =================    ===============   ===============   ===============
Net income to minority interests                     $8,700              $11,541           $41,057          $35,823
                                                 =================    ===============   ===============   ===============
Income per share from continuing operations:
   Basic                                              $0.11                $0.12             $0.50            $0.40
   Diluted                                            $0.11                $0.12             $0.49            $0.40
Income per share from discontinued operations:
   Basic                                                  -                $0.01                 -            $0.01
   Diluted                                                -                $0.01                 -            $0.01
                                                 -----------------    ---------------   ---------------   ---------------
Net income per share to common stockholders:
   Basic                                              $0.11                $0.13             $0.50            $0.41
                                                 =================    ===============   ===============   ===============
   Diluted                                            $0.11                $0.13             $0.49            $0.41
                                                 =================    ===============   ===============   ===============
Weighted average shares of common stock (basic)     19,350,672           18,356,278        18,948,214       18,242,495
                                                 =================    ===============   ===============   ===============
Weighted average shares of common stock (diluted)   19,418,884           18,407,891        19,024,662       18,289,699
                                                 =================    ===============   ===============   ===============
Weighted average O.P. units outstanding             85,233,964           86,169,195        85,609,739       86,254,519
                                                 =================    ===============   ===============   ===============

FUNDS FROM OPERATIONS
Funds from operations                               $16,567              $18,528           $68,047          $59,977
                                                 =================    ===============   ===============   ===============
Funds from operations per share (3)                  $ 0.16               $ 0.18            $ 0.65           $ 0.57
                                                 =================    ===============   ===============   ===============
Outstanding common stock                            19,397,287           18,367,691        19,397,287       18,367,691
                                                 =================    ===============   ===============   ===============
Outstanding O.P. units                              85,231,199           86,169,195        85,231,199       86,169,195
                                                 =================    ===============   ===============   ===============
Weighted average O.P. units and common stock
   outstanding (diluted)                           104,652,848          104,577,086       104,634,401      104,544,218
                                                 =================    ===============   ===============   ===============


                                     - 4 -





                                                   Three Months        Three Months      Nine Months       Nine Months
FUNDS FROM OPERATIONS CALCULATION                     Ended               Ended             Ended             Ended
                                                  Sept 30, 2006       Sept 30, 2005     Sept 30, 2006     Sept 30, 2005
                                                 -----------------    ---------------   ---------------   ---------------
                                                                                               
Net income                                          $ 2,106              $ 2,451          $  9,380          $ 7,554
Add:
   Minority interests (4)                             8,566               11,414            40,676           35,441
   Depreciation and amortization of real estate
      from continuing operations                      6,095                5,721            17,769           17,301
   Depreciation and amortization of real estate
      from discontinued operations                        -                   77                 -              315
   Depreciation & amortization of real estate
      held in unconsolidated joint venture              238                  210               660              774
Less:
   Gain on sale of JV real estate or real estate       (438)              (1,345)             (438)          (1,408)
                                                 -----------------    ---------------   ---------------   ---------------
Funds from operations                               $16,567              $18,528           $68,047          $59,977
                                                 =================    ===============   ===============   ===============


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, 2006      Sept 30, 2005      Sept 30, 2006    Sept 30, 2005
                                                  ---------------    ---------------    ---------------  ---------------
                                                                                             
Total properties, end of period                         110                  107               110              107
Total square feet, end of period                  7,936,481            7,780,082         7,936,481        7,780,082
Average monthly rental revenue per square foot(5)     $1.55                $1.57             $1.59            $1.56
Occupancy for leased properties                        64.2%                67.5%             64.2%            67.5%
Straight-line rent                                  ($  218)               ($ 99)          ($1,048)          $  791
Leasing commissions                                  $  500                 $ 37            $  815           $3,990
Capital expenditures                                 $1,186                 $234            $1,349           $  871



                                     - 5 -






BALANCE SHEET                                  September 30, 2006    December 31, 2005
                                              --------------------  --------------------
Assets:
                                                                 
Land                                              $  277,269            $  273,933
Buildings and improvements                           778,378               766,457
Real estate related intangible assets                 19,529                17,410
                                              --------------------  --------------------
   Total investments in properties                 1,075,176             1,057,800
Less accumulated depreciation and amortization      (148,468)             (130,419)
                                              --------------------  --------------------
   Net investments in properties                     926,708               927,381
Cash and cash equivalents                             42,443                31,441
Restricted cash                                        6,893                16,712
Deferred rent receivable                              18,170                19,218
Investment in unconsolidated joint venture             3,472                 3,263
Other assets, net                                     25,537                25,362
                                              --------------------  --------------------
   Total assets                                   $1,023,223            $1,023,377
                                              ====================  ====================

Liabilities:
Mortgage notes payable                             $ 350,000             $ 357,481
Mortgage notes payable - related parties               9,756                10,051
Interest payable                                         321                   321
Security deposits                                      6,804                 8,047
Deferred rental income                                 9,288                 6,103
Dividend/distribution payable                         16,741                16,725
Accounts payable and accrued expenses                 14,000                 8,952
                                              --------------------  --------------------
   Total liabilities                                 406,910               407,680
                                              --------------------  --------------------

Minority interests                                   490,122               500,682
                                              --------------------  --------------------

Stockholders' equity:
Common stock, $.001 par value                             19                    18
Paid-in capital                                      148,993               138,038
Accumulated deficit                                  (22,821)              (23,041)
                                              --------------------  --------------------
   Total stockholders' equity                        126,191               115,015
                                              --------------------  --------------------
   Total liabilities and stockholders' equity     $1,023,223            $1,023,377
                                              ====================  ====================


(1)  Includes  approximately  $472 in amortization  expense for the three months
     ended  September 30, 2006 and 2005 and $1,416 in  amortization  expense for
     the nine months ended  September 30, 2006 and 2005 for the  amortization of
     an above-market  lease  intangible asset pursuant to Statement of Financial
     Accounting Standard No. 141, "Business Combinations."

(2)  Includes  approximately $425 and $321 in amortization expense for the three
     months  ended  September  30, 2006 and 2005,  respectively,  and $1,189 and
     $1,123 in amortization expense for the nine months ended September 30, 2006
     and 2005,  respectively,  for the  amortization  of  in-place  lease  value
     intangible asset 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.


                                     - 6 -