Document:

Amendment No. 1 to Common Stock Purchase

 Exhibit 10.3 
 As of March 31, 2008 
 StockerYale, Inc. 
 32
Hampshire Road 
 Salem, New Hampshire 03079 
 Attention:        Chief Financial Officer 
  

	 	Re:	Amendment to Common Stock Purchase Warrant No. 2003-2 

 (Issue Date: February 20, 2004) 
 Ladies and Gentlemen: 
 Reference is made to (a) that certain Common Stock Purchase Warrant No. 2003-2 issued by StockerYale, Inc., a Massachusetts corporation (the “Company”) on February 20, 2004 in favor of
PSource Structured Debt Limited (as partial assignee of Laurus Master Fund, Ltd.) (the “Holder”), providing for the purchase of up to an aggregate amount of 700,000 shares of Common Stock of the Company (the
“Warrant”) and (b) that certain lockup agreement dated as of the date hereof, made by the Holder in favor of the Company with respect to the Securities defined therein. Capitalized terms used herein that are not defined shall
have the meanings given to them in the Warrant. 
 In consideration of the foregoing and other good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged, the parties hereto hereby agree that “Expiration Date” (as defined in the Warrant) is hereby amended such that “Expiration Date” shall hereafter mean February 22, 2016.

 This letter agreement shall become effective upon receipt by the Holder of a copy of this letter agreement executed by the Company.

 Except as specifically amended herein, the Warrant shall remain in full force and effect, and are hereby ratified and confirmed. The
execution, delivery and effectiveness of this letter agreement shall not operate as a waiver of any right, power or remedy of the Holder, nor constitute a waiver of any provision of the Warrant. This letter agreement shall be binding upon and inure
to the benefit of the parties hereto and their respective successors and assigns and shall be governed by and construed in accordance with the laws of the State of New York. 
 [Remainder of Page Intentionally Left Blank] 

 This letter agreement may be executed by the parties hereto in one or more counterparts, each of which
shall be deemed an original and all of which when taken together shall constitute one and the same agreement. Any signature delivered by a party by facsimile transmission shall be deemed to be an original signature hereto. 
  

			
	Very truly yours,
	
	PSOURCE STRUCTURED DEBT LIMITED
		
	By:	 	 Laurus Capital Management, LLC,
 its investment
manager

		
	By:	 	 /s/ Scott Bluestein

	Name:	 	Scott Bluestein
	Title:	 	Authorized Signatory

  

			
	CONSENTED AND AGREED TO:
	
	STOCKERYALE, INC.
		
	By:	 	 /s/ Mark W. Blodgett

	Name:	 	Mark W. Blodgett
	Title:	 	President and Chief Executive Officer

 AMENDMENT TO WARRANT NO. 2003-2 
 (ISSUE DATE: FEBRUARY 20, 2004)Amendment No. 1 to Common Stock Purchase

 Exhibit 10.4 
 As of March 31, 2008 
 StockerYale, Inc. 
 32
Hampshire Road 
 Salem, New Hampshire 03079 
 Attention:        Chief Financial Officer 
  

	 	Re:	Amendment to Common Stock Purchase Warrant No. 2003-1 

 (Issue Date: June 10, 2004) 
 Ladies and Gentlemen: 
 Reference is made to (a) that certain Common Stock Purchase Warrant No. 2003-1 issued by StockerYale, Inc., a Massachusetts corporation (the “Company”) on June 10, 2004 in favor of
PSource Structured Debt Limited (as partial assignee of Laurus Master Fund, Ltd.) (the “Holder”), providing for the purchase of up to an aggregate amount of 400,000 shares of Common Stock of the Company (the
“Warrant”) and (b) that certain lockup agreement dated as of the date hereof, made by the Holder in favor of the Company with respect to the Securities defined therein. Capitalized terms used herein that are not defined shall
have the meanings given to them in the Warrant. 
 In consideration of the foregoing and other good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged, the parties hereto hereby agree that “Expiration Date” (as defined in the Warrant) is hereby amended such that “Expiration Date” shall hereafter mean June 10, 2016.

 This letter agreement shall become effective upon receipt by the Holder of a copy of this letter agreement executed by the Company.

 Except as specifically amended herein, the Warrant shall remain in full force and effect, and are hereby ratified and confirmed. The
execution, delivery and effectiveness of this letter agreement shall not operate as a waiver of any right, power or remedy of the Holder, nor constitute a waiver of any provision of the Warrant. This letter agreement shall be binding upon and inure
to the benefit of the parties hereto and their respective successors and assigns and shall be governed by and construed in accordance with the laws of the State of New York. 
 [Remainder of Page Intentionally Left Blank] 

 This letter agreement may be executed by the parties hereto in one or more counterparts, each of which
shall be deemed an original and all of which when taken together shall constitute one and the same agreement. Any signature delivered by a party by facsimile transmission shall be deemed to be an original signature hereto. 
  

			
	Very truly yours,
	
	PSOURCE STRUCTURED DEBT LIMITED
		
	By:	 	 Laurus Capital Management, LLC,
 its investment
manager

		
	By:	 	 /s/ Scott Bluestein

	Name:	 	Scott Bluestein
	Title:	 	Authorized Signatory

  

			
	CONSENTED AND AGREED TO:
	
	STOCKERYALE, INC.
		
	By:	 	 /s/ Mark W. Blodgett

	Name:	 	Mark W. Blodgett
	Title:	 	President and Chief Executive Officer

 AMENDMENT TO WARRANT NO. 2003-1 
 (ISSUE DATE: JUNE 10, 2004)Amendment No. 1 to Common Stock Purchase

 Exhibit 10.5 
 As of March 31, 2008 
 StockerYale, Inc. 
 32
Hampshire Road 
 Salem, New Hampshire 03079 
 Attention:        Chief Financial Officer 
  

	 	Re:	Amendment to Common Stock Purchase Warrant No. 12082004-1 

 (Issue Date: December 8, 2004) 
 Ladies and Gentlemen: 
 Reference is made to (a) that certain Common Stock Purchase Warrant No. 12082004-1 issued by StockerYale, Inc., a Massachusetts corporation (the “Company”) on December 8, 2004 in favor
of PSource Structured Debt Limited (as partial assignee of Laurus Master Fund, Ltd.) (the “Holder”), providing for the purchase of up to an aggregate amount of 95,000 shares of Common Stock of the Company (the
“Warrant”) and (b) that certain lockup agreement dated as of the date hereof, made by the Holder in favor of the Company with respect to the Securities defined therein. Capitalized terms used herein that are not defined shall
have the meanings given to them in the Warrant. 
 In consideration of the foregoing and other good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged, the parties hereto hereby agree that “Expiration Date” (as defined in the Warrant) is hereby amended such that “Expiration Date” shall hereafter mean December 8, 2016.

 This letter agreement shall become effective upon receipt by the Holder of a copy of this letter agreement executed by the Company.

 Except as specifically amended herein, the Warrant shall remain in full force and effect, and are hereby ratified and confirmed. The
execution, delivery and effectiveness of this letter agreement shall not operate as a waiver of any right, power or remedy of the Holder, nor constitute a waiver of any provision of the Warrant. This letter agreement shall be binding upon and inure
to the benefit of the parties hereto and their respective successors and assigns and shall be governed by and construed in accordance with the laws of the State of New York. 
 [Remainder of Page Intentionally Left Blank] 

 This letter agreement may be executed by the parties hereto in one or more counterparts, each of which
shall be deemed an original and all of which when taken together shall constitute one and the same agreement. Any signature delivered by a party by facsimile transmission shall be deemed to be an original signature hereto. 
  

			
	Very truly yours,
	
	PSOURCE STRUCTURED DEBT LIMITED
		
	By:	 	 Laurus Capital Management, LLC,
 its investment
manager

		
	By:	 	 /s/ Scott Bluestein

	Name:	 	Scott Bluestein
	Title:	 	Authorized Signatory

  

			
	CONSENTED AND AGREED TO:
	
	STOCKERYALE, INC.
		
	By:	 	 /s/ Mark W. Blodgett

	Name:	 	Mark W. Blodgett
	Title:	 	President and Chief Executive Officer

 AMENDMENT TO WARRANT NO.          

(ISSUE DATE: DECEMBER 8, 2004)Amendment No. 1 to Common Stock Purchase

 Exhibit 10.6 
 As of March 31, 2008 
 StockerYale, Inc. 
 32
Hampshire Road 
 Salem, New Hampshire 03079 
 Attention:        Chief Financial Officer 
  

	 	Re:	Amendment to Common Stock Purchase Warrant No. 1 

 (Issue Date: July 13, 2005) 
 Ladies and Gentlemen: 
 Reference is made to (a) that certain Common Stock Purchase Warrant No. 1 issued by StockerYale, Inc., a Massachusetts corporation (the “Company”) on July 13, 2005 in favor of Valens
U.S. SPV I, LLC (as partial assignee of Laurus Master Fund, Ltd. (“Laurus”)) (“Valens US”), Valens Offshore SPV II, Corp. (as partial assignee of Laurus) (“Valens Offshore”) and PSource Structured
Debt Limited (as partial assignee of Laurus) (“PSource” and, together with Valens US and Valens Offshore, collectively the “Holders”), providing for the purchase of up to an aggregate amount of 150,000 shares of
Common Stock of the Company (collectively, the “Warrant”) and (b) that certain lockup agreement dated as of the date hereof, made by the Holders in favor of the Company with respect to the Securities defined therein.
Capitalized terms used herein that are not defined shall have the meanings given to them in the Warrant. 
 In consideration of the foregoing
and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto hereby agree that “Expiration Date” (as defined in the Warrant) is hereby amended such that “Expiration
Date” shall hereafter mean July 13, 2017. 
 This letter agreement shall become effective upon receipt by the Holders of a copy of
this letter agreement executed by the Company. 
 Except as specifically amended herein, the Warrant shall remain in full force and effect,
and are hereby ratified and confirmed. The execution, delivery and effectiveness of this letter agreement shall not operate as a waiver of any right, power or remedy of the Holders, nor constitute a waiver of any provision of the Warrant. This
letter agreement shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns and shall be governed by and construed in accordance with the laws of the State of New York. 
 [Remainder of Page Intentionally Left Blank] 

 This letter agreement may be executed by the parties hereto in one or more counterparts, each of which
shall be deemed an original and all of which when taken together shall constitute one and the same agreement. Any signature delivered by a party by facsimile transmission shall be deemed to be an original signature hereto. 
  

			
	Very truly yours,
	
	VALENS U.S. SPV I, LLC
		
	By:	 	 Valens Capital Management, LLC,
 its investment
manager

		
	By:	 	 /s/ Scott Bluestein

	Name:	 	Scott Bluestein
	Title:	 	Authorized Signatory
	
	VALENS OFFSHORE SPV II, CORP.
		
	By:	 	 Valens Capital Management, LLC,
 its investment
manager

		
	By:	 	 /s/ Scott Bluestein

	Name:	 	Scott Bluestein
	Title:	 	Authorized Signatory
	
	PSOURCE STRUCTURED DEBT LIMITED
		
	By:	 	 Laurus Capital Management, LLC,
 its investment
manager

		
	By:	 	 /s/ Scott Bluestein

	Name:	 	Scott Bluestein
	Title:	 	Authorized Signatory

  

			
	CONSENTED AND AGREED TO:
	
	STOCKERYALE, INC.
		
	By:	 	 /s/ Mark W. Blodgett

	Name:	 	Mark W. Blodgett
	Title:	 	President and Chief Executive Officer

 AMENDMENT TO WARRANT NO. 1 
 (ISSUE DATE: JULY 13, 2005)

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