SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Marshall Wace LLP

(Last) (First) (Middle)
THE ADELPHI
1-11 JOHN ADAM STREET

(Street)
LONDON X0 WC2N 6HT

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
STOCKERYALE INC [ STKR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
04/17/2006
4. If Amendment, Date of 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
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 04/17/2006 P 534,700 A $1.04 3,706,922 I See footnote(1)
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 Securities Underlying Derivative Security (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: 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 to Purchase Common Stock $1.17 04/19/2006 08/12/2010 Common Stock 740,741 740,741 I see footnote(1)
Warrants to Purchase Common Stock $0.9 04/19/2006 05/12/2010 Common Stock 250,000 250,000 I see footnote(1)
Warrants to Purchase Common Stock $1.38 04/19/2006 12/13/2009 Common Stock 125,000 125,000 I see footnote(1)
Warrants to Purchase Common Stock $0.9 01/03/2006 P 150,000 04/19/2006 12/15/2010 Common Stock 150,000 (2) 150,000 I see footnote(1)
1. Name and Address of Reporting Person*
Marshall Wace LLP

(Last) (First) (Middle)
THE ADELPHI
1-11 JOHN ADAM STREET

(Street)
LONDON X0 WC2N 6HT

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
EUREKA INTERACTIVE FUND LTD

(Last) (First) (Middle)
C/O MARSHALL WACE LLP
THE ADELPHI, 1/11 JOHN ADAM STREET

(Street)
LONDON X0 WC2N 6HT

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Wace Ian

(Last) (First) (Middle)
C/O MARSHALL WACE LLP, THE ADELPHI
1-11 JOHN ADAM STREET

(Street)
LONDON X0 WC2N-6HT

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Hawtin Mark

(Last) (First) (Middle)
C/O MARSHALL WACE LLP, THE ADELPHI
1-11 JOHN ADAM STREET

(Street)
LONDON X0 WC2N-6HT

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
Explanation of Responses:
1. See Exhibit 99.1
2. See Exhibit 99.1
Marshall Wace LLP, By: /s/ Mark Hawtin, Partner 04/19/2006
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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