Ownership Submission
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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Wood River Trust
   2. Issuer Name and Ticker or Trading Symbol
PLURISTEM LIFE SYSTEMS INC [PLRS.OB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
1007 ORANGE STREET, SUITE 1410, NEMOURS BUILDING		 3. Date of Earliest Transaction (Month/Day/Year)
06/13/2007
(Street)

WILMINGTON, DE 19801		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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 Stock, par value $0.00001 per share 06/13/2007   X   100,000,000 A $ 0.025 200,000,000 D (1)  
Common Stock 06/13/2007   J(2)   26,693,227 D $ 0.0937 173,306,773 D (1)  

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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
Warrants (right to buy) $ 0.025 06/13/2007   X     100,000,000 06/13/2007 05/14/2012 Common Stock 100,000,000 (3) 0 D (1)  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Wood River Trust
1007 ORANGE STREET, SUITE 1410
NEMOURS BUILDING
WILMINGTON, DE 19801		     X    
Doyle Michael C.
1007 ORANGE STREET, SUITE 1410
NEMOURS BUILDING
WILMINGTON, DE 19801		     X    

Signatures

 Wood River Trust By: /s/ Michael C. Doyle, Trustee   08/03/2007
**Signature of Reporting Person Date
 /s/ Michael C. Doyle   08/03/2007
**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) These securities are owned directly by Wood River Trust. Michael C. Doyle is the sole Trustee of Wood River Trust and, in such capacity, may be deemed indirectly to beneficially own the securities owned by the Wood River Trust.
(2) Wood River Trust consummated a cashless exercise of the Warrants, pursuant to which 26,693,227 shares of Common Stock otherwise issuable upon exercise of such Warrants were forfeited in lieu of paying the cash exercise price.
(3) These Warrants were included in Units consisting of 1 share of Common Stock and 1 Warrant that were purchased for $0.0125 per Unit.

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