SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULES 13d-1(b), (c), AND
(d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. )*
Mission West Properties
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
605203108
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(CUSIP Number)
DECEMBER 31, 2006
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(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant
to which this Schedule is filed:
(x) Rule 13d-1(b)
( ) Rule 13d-1(c)
( ) Rule 13d-1(d)
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*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
(Continued on following page(s))
1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Teachers Advisors, Inc.
I.R.S. # 13-3760073
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ( )
(b) ( )
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:
5. SOLE VOTING POWER 1,054,000
6. SHARED VOTING POWER 0
7. SOLE DISPOSITIVE POWER 1,054,000
8. SHARED DISPOSITIVE POWER 0
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,054,000
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ( )
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.43 %
12. TYPE OF REPORTING PERSON
IA
1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
TIAA-CREF Investment Management, LLC
I.R.S. #13-3586142
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ( )
(b) ( )
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:
5. SOLE VOTING POWER 252,600
6. SHARED VOTING POWER 0
7. SOLE DISPOSITIVE POWER 252,600
8. SHARED DISPOSITIVE POWER 0
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
252,600
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ( )
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
1.30%
12. TYPE OF REPORTING PERSON
IA
Item 1(a). NAME OF ISSUER:
Mission West Properties
Item 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
10050 Bandley Drive
Cupertino, CA 95014
Items 2(a)-2(c). NAME, ADDRESS OF PRINCIPAL BUSINESS OFFICE, AND CITIZENSHIP
OF PERSONS FILING:
Teachers Advisors, Inc. ("Advisors")
730 Third Avenue
New York, NY 10017
Citizenship: Delaware
TIAA-CREF Investment Management, LLC
("Investment Management")
730 Third Avenue
New York, NY 10017
Citizenship: Delaware
Item 2(d). TITLE OF CLASS OF SECURITIES:
Common Stock
Item 2(e). CUSIP NUMBER: 605203108
Item 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR
13d-2(b) or (c), CHECK WHETHER THE PERSON FILING IS A:
ADVISORS
(a) ( ) Broker or dealer registered under Section 15 of the Exchange Act.
(b) ( ) Bank as defined in Section 3(a)(6) of the Exchange Act.
(c) ( ) Insurance Company as defined in Section 3(a)(19) of the Exchange Act.
(d) ( ) Investment Company registered under Section 8 of the Investment
Company Act.
(e) (x) An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).
(f) ( ) An employee benefit plan or endowment fund in accordance with Rule
13d-1(b)(1)(ii)(F).
(g) ( ) A parent holding company or control person in accordance with Rule
13d-1(b)(1)(ii)(G).
(h) ( ) A savings association as defined in Section 3(b) of the Federal
Deposit Insurance Act.
(i) ( ) A church plan that is excluded from the definition of an investment
company under Section 3(c)(14) of the Investment Company Act.
(j) ( ) Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
INVESTMENT MANAGEMENT
(a) ( ) Broker or dealer registered under Section 15 of the Exchange Act.
(b) ( ) Bank as defined in Section 3(a)(6) of the Exchange Act.
(c) ( ) Insurance Company as defined in Section 3(a)(19) of the Exchange Act.
(d) ( ) Investment Company registered under Section 8 of the Investment
Company Act.
(e) (x) An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).
(f) ( ) An employee benefit plan or endowment fund in accordance with Rule
13d-1(b)(1)(ii)(F).
(g) ( ) A parent holding company or control person in accordance with Rule
13d-1(b)(1)(ii)(G).
(h) ( ) A savings association as defined in Section 3(b) of the Federal
Deposit Insurance Act.
(i) ( ) A church plan that is excluded from the definition of an investment
company under Section 3(c)(14) of the Investment Company Act.
(j) ( ) Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c), check this box. ( )
Item 4. OWNERSHIP
(a) Aggregate amount beneficially owned: 1,306,600 (See Exhibit A)
(b) Percent of class: 6.74 %
(c) Powers of shares:
INVESTMENT MANAGEMENT ADVISORS
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Sole Voting Power: 252,600 1,054,000
Shared Voting Power: 0 0
Sole Dispositive Power: 252,600 1,054,000
Shared Dispositive Power: 0 0
Item 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
If this statement is being filed to report the fact that as of
the date hereof the reporting person has ceased to be the
beneficial owner of more than five percent of the class of
securities, check the following ( ).
Item 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
See Exhibit A
Item 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
Not Applicable
Item 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not Applicable
Item 9. NOTICE OF DISSOLUTION OF GROUP.
Not Applicable
Item 10. CERTIFICATION.
By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired and
are held in the ordinary course of business and were not
acquired and are not held for the purpose of or with the
effect of changing or influencing the control of the issuer of
the securities and were not acquired and are not held in
connection with or as a participant in any transaction having
that purpose or effect.
SIGNATURE.
After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this
statement is true, complete and correct.
Date: February 14, 2007
TIAA-CREF INVESTMENT
MANAGEMENT, LLC
By: /s/ Paul Szeto
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Paul Szeto
Managing Director
TEACHERS ADVISORS, INC.
By: /s/ Paul Szeto
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Paul Szeto
Managing Director
EXHIBIT A
ITEM 6. OWNERSHIP.
TIAA-CREF Investment Management, LLC ("Investment Management") acts as an
investment adviser to the College Retirement Equities Fund ("CREF"), a
registered investment company, and may be deemed to be a beneficial owner of
252,600 shares of Issuer's common stock owned by CREF. Teachers Advisors, Inc.
("Advisors") is the investment adviser to two registered investment companies,
TIAA-CREF Institutional Mutual Funds ("Institutional Funds") and TIAA-CREF Life
Funds ("Life Funds"), as well as the TIAA-CREF Asset Management Commingled Funds
Trust I ("TCAM Funds"), and may be deemed to be a beneficial owner of 1,054,000
shares of Issuer's common stock owned by Institutional Funds. Investment
Management and Advisors are reporting their combined holdings for the purpose of
administrative convenience. These shares were acquired in the ordinary course of
business, and not with the purpose or effect of changing or influencing control
of the Issuer. Each of Investment Management and Advisors expressly disclaims
beneficial ownership of the other's securities holdings and each disclaims that
it is a member of a "group" with the other.