FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * Finnin Jeffrey S   2. Issuer Name and Ticker or Trading Symbol PROLOGIS [PLD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Mng. Dir. Chief Accntng Offcr (Last) (First) (Middle) 4545 AIRPORT WAY 3. Date of Earliest Transaction (Month/Day/Year) 05/20/2010 (Street) DENVER, CO 80239 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares of Beneficial Interest, par value $0.01 (1) 05/20/2010 05/20/2010 M   7,500 A $ 0 20,604 (2) D   Common Shares of Beneficial Interest, par value $.01 (3) 05/20/2010 05/20/2010 M   188 A $ 0 20,793 (2) D   Common Shares of Beneficial Interest, par value $0.01 (4) 05/20/2010 05/20/2010 F   2,390 D $ 11.18 18,403 (2) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Share Units

$ 0 (1)

05/20/2010

05/20/2010

M

7,500

(1)

(1)

Common Shares of Beneficial Interest

7,500

$ 0

56,554

D

Dividend Equivalent Units on RSUs

$ 0 (3)

05/20/2010

05/20/2010

M

188

(3)

(3)

Common Shares of Beneficial Interest

188

$ 0

56,366

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Finnin Jeffrey S 4545 AIRPORT WAY DENVER, CO 80239			Mng. Dir. Chief Accntng Offcr

Signatures

/s/ Kristi Oberson attorney-in-fact for Jeffrey Finnin		05/24/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	RSUs. Conversion of 25% of restricted share unit award ("RSU") granted May 20, 2009 following vest. The RSUs convert into common shares on a 1-for-1 basis.
(2)	Finnin - Balance in column 5 includes holdings in the ProLogis Employee Share Purchase Plan and 401k.
(3)	DEUS. Automatic settlement of Dividend Equivalent Units ("DEUs"). DEUs are settled in connection with vesting of RSUs. They are settled in ProLogis common shares on a 1-for-1 basis. DEUs have no exercise price or expiration date. Fractional DEUs are settled in cash.
(4)	Shares withheld for payment of tax liability relating to reported RSU conversion and DEU settlement.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.