Document:

Amendment No. 1 to Solar Wafer Supply Agreement

 Exhibit 10.43 
 CONFIDENTIAL TREATMENT 
 AMENDMENT NUMBER 1 TO 
 SOLAR WAFER SUPPLY AGREEMENT 
 This Amendment Number 1 to Solar Wafer Supply Agreement (this “Amendment”) is entered into as of October 25, 2007, by and between MEMC ELECTRONIC MATERIALS, INC., a Delaware corporation with its principal place
of business at 501 Pearl Drive (City of O’Fallon), St. Peters, Missouri 63376, United States of America, or its designated majority-owned subsidiary (“MEMC”), and GINTECH ENERGY CORPORATION, a Taiwan corporation with its
principal place of business at 8F, no. 396, Sec. 1 Neihu Rd. Neihu Technology Park, Taipei 114, Taiwan (“Gintech”), or its designated majority-owned subsidiary. MEMC and Gintech together shall be referred to as the
“Parties” and individually as a “Party”. 
 RECITALS: 
 WHEREAS, on October 25, 2006, the Parties entered into that certain Solar Wafer Supply Agreement (the “Agreement”), pursuant to
which MEMC agreed to supply and Gintech agreed to purchase certain quantities of solar wafers, pursuant to the terms of the Agreement; and 
 WHEREAS, the Parties hereto wish to amend the Agreement to provide for additional incremental volume in the quantities and at the prices as provided herein: 
 NOW, THEREFORE, in consideration of the foregoing and the mutual representations, warranties, covenants and agreements herein contained, MEMC and Gintech agree as follows: 
 ARTICLE I 
 AMENDMENT TO SELECTED
SECTIONS OF THE AGREEMENT 
 1.1 Defined Terms. Capitalized terms used herein and not otherwise defined herein shall have the meanings
set forth in the Agreement. 
 1.2 Incremental Volumes at Different Prices. Each Contract Year (commencing with the second Contract
Year), as set forth below in this Section 1.2, Gintech agrees to purchase from MEMC pursuant to this Amendment, over the course of the Contract Year, an additional target quantity of Wafers (such additional quantity of Wafers, measured in
megawatts, the “Incremental Volume”), at the prices for such Incremental Volume only as set forth on Addendum B-1 hereto. Each Contract Year, as set forth below in this Section 1.2, MEMC agrees to supply Gintech, over
the course of the Contract Year, with the Incremental Volume per Contract Year, at the prices for such Incremental Volume only as set forth on Addendum B-1 hereto. Except as specifically set forth in this Amendment, all other terms of the
Agreement remain the same and apply to this Incremental Volume (such as Purchase Shortfall calculations, Missed Delivery calculations, etc.), with only the following exceptions: 
 (a) For Contract Years six through eleven only, with three (3) years advance notice, Gintech may reduce its purchase obligation for
any given Contract Year by a quantity of up to [***] percent ([***]%) of the Incremental Volume for that Contract Year. 
  

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 CONFIDENTIAL TREATMENT 
  

 (b) Mix Between Multi Wafers and Mono Wafers. The Parties agree that
[***] of the Incremental Volume of Wafers represented by this Amendment shall be Multi Wafers [***]. 
 (c)
Incremental Loan/Security Deposit Amount. Pursuant to this Section 1.2(c) and Addendum B-1 attached hereto, the Loan/Security Deposit and the Retained Loan/Security Deposit Amount are each hereby increased due to the Incremental
Volume as set forth on Addendum B-1. The formula for calculating these amounts remains unchanged from the Agreement, with any exceptions to the payment terms noted on Addendum B-1. 
 (d) Incremental Letter of Credit Amount. Pursuant to this Section 1.2(d) and Addendum B-1 attached hereto, the Letter
of Credit Amount is hereby increased due to the Incremental Volume as set forth on Addendum B-1. The formula for calculating the Letter of Credit Amount remains unchanged from the Agreement. 
 ARTICLE II 
 MISCELLANEOUS 
 2.1 No Other Changes. Other than with respect to the Sections of the Agreement and Attachments to the Agreement specifically enumerated above,
this Amendment does not modify, change or delete any other addendum, term, provision, representation, warranty or covenant (the “Provisions”) relating to or contained in the Agreement or any Attachment, and all such Provisions of
the Agreement shall remain in full force and effect. 
 2.2 Amendment. This Amendment may be amended, modified or supplemented only in
writing signed by MEMC and Gintech. 
 2.3 Applicable Law. This Amendment shall be governed by and construed and enforced in
accordance with the internal Laws of the State of New York, without giving effect to the principles of conflicts of law thereof. 
 2.4
Counterparts; Facsimile Signatures. This Amendment may be executed in counterparts, and when so executed each counterpart shall be deemed to be an original, and said counterparts together shall constitute one and the same instrument. This
Amendment may be executed and delivered by facsimile and upon such delivery the facsimile signature shall be deemed to have the same effect as if the original signature had been delivered to the other Part(ies). The original signature copy shall be
delivered to the other Part(ies) by express overnight delivery. The failure to deliver the original signature copy and/or the nonreceipt of the original signature copy shall have no effect upon the binding and enforceable nature of this Amendment.

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 CONFIDENTIAL TREATMENT 
  

 IN WITNESS WHEREOF, the Parties hereto have caused this Amendment to be executed and delivered as of
the date first above written. 
  

									
	MEMC ELECTRONIC MATERIALS, INC.	 		 	GINTECH ENERGY CORPORATION
					
	By:	 	 /s/ Nabeel Gareeb
	 		 	By:	 	 /s/ Ellick Liao

		 	Nabeel Gareeb	 		 		 	Ellick Liao
		 	President and Chief Executive Officer	 		 		 	President

 SIGNATURE PAGE TO 
 AMENDMENT NUMBER 1 TO SOLAR WAFER SUPPLY AGREEMENT 

 CONFIDENTIAL TREATMENT 
  

 Addendum B-1 
 [***] 
  

 B-1Form of MEMC Electronic Materials, Inc. Stock Unit Award Agreement for Directors

 Exhibit 10.44 
 MEMC ELECTRONIC MATERIALS, INC. 
 STOCK UNIT AWARD AGREEMENT 
 For Directors 
                     , 20     
 2001 Equity Incentive Plan 
 THIS AGREEMENT is effective
                    , 20    , between MEMC Electronic Materials, Inc. (the “Company”) and
                                 (the “Participant”). 
 WHEREAS, the Company has adopted and maintains the MEMC Electronic Materials, Inc. 2001 Equity Incentive Plan (the “Plan”) to promote the
interests of the Company and its stockholders by providing the directors, key employees and consultants of the Company and its Affiliates with an appropriate incentive to encourage them to continue in the service and employ of the Company or
Affiliate and to improve the growth and profitability of the Company; 
 WHEREAS, the Plan provides for the grant to Participants in the Plan
of Stock Unit Awards; and the Company wishes to grant Stock Unit Awards to certain directors in consideration for their service on the Board of Directors. 
 NOW, THEREFORE, in consideration of the mutual promises set forth in this Agreement, the parties hereto hereby agree as follows: 
 Grant of Stock Unit Awards. Subject to the terms and conditions contained herein and in the Plan, the Company hereby grants to the Participant
             Stock Unit Awards. Each Stock Unit Award represents the obligation of the Company to transfer one share of Common Stock to the Participant at the time provided in
this Agreement, provided such Stock Unit Award is vested at such time. 
 Incorporation of Plan. All terms, conditions and
restrictions of the Plan are incorporated herein and made part hereof as if stated herein. If there is any conflict between the terms and conditions of the Plan and this Agreement, the terms and conditions of the Plan, as interpreted by the MEMC
Compensation Committee (the “Committee”), shall govern. All capitalized terms used herein shall have the meaning given to such terms in the Plan. 
 Bookkeeping Account. The Company shall record the number of Stock Unit Awards granted hereunder to a bookkeeping account for the Participant (the “Stock Unit Account”). The Participant’s
Stock Unit Account shall be debited by the number of Stock Unit Awards, if any, forfeited in accordance with this Agreement and by the number of shares of Common Stock transferred to the Participant with respect to such Stock Unit Awards. The
Participant’s Stock Unit Account also shall be adjusted from time to time for stock dividends, stock splits and other such transactions in accordance with the Plan. 

 Terms and Conditions of Stock Unit Awards. The Stock Unit Awards evidenced hereby are
subject to the following terms and conditions: 
  

	(a)	Vesting. Fifty percent (50%) of the Stock Unit Awards granted to the Participant hereby shall become vested as of [date]. The remaining fifty percent
(50%) of the Stock Unit Awards granted to the Participant hereby shall become vested as of [date]. 

 All of the Stock Unit
Awards granted to the Participant hereby shall become vested upon the death or Disability of the Participant. 
 Notwithstanding the
foregoing, unless the Committee otherwise determines at a later date, if within the two year period following a Change in Control the Participant’s service on the Board of the Directors of the Company is terminated by the shareholders of the
Company, all of the Stock Unit Awards granted to the Participant hereby shall become vested as of the effective date of the termination of the Participant’s service on the Board of Directors of the Company. 
  

	(b)	Forfeiture Upon Termination of Service. Except as otherwise provided in (a) above, upon cessation of the Participant’s service on the Board of Directors of
the Company for any reason before [date], the number of shares of Stock Unit Awards subject to this Agreement that have not become vested shall be forfeited, except as the Committee may otherwise determine in its sole discretion.

 Distribution of Common Stock. Subject to the provisions below, as soon as practical after the Participant
experiences a separation from service for purposes of Section 409A of the Internal Revenue Code, the Company shall transfer shares of Common Stock to the Participant equal in number to the Stock Unit Awards credited to the Participant’s
Stock Unit Account that are vested at the time of such separation from service. Such transfer shall be made within 30 days following such separation from service. Notwithstanding the foregoing sentence, any distribution to a Participant who is also
a “specified employee”, as defined under Section 409A of the Internal Revenue Code, shall be delayed, and not distributed until the date that is six months and one day following a separation from service for purposes of
Section 409A of the Internal Revenue Code. 
 Source of Payment. Shares of Common Stock transferable to the Participant,
or upon death to his or her beneficiary, under this Agreement shall be authorized but unissued shares. The Company shall have no duties to segregate or set aside any assets to secure the Participant’s right to receive shares of Common Stock
under this Agreement. The Participant shall not have any rights with respect to transfer of shares of Common Stock under this Agreement other than the unsecured right to receive shares of Common Stock from the Company. 

 Units Non-Transferable. Stock Unit Awards awarded hereunder shall not be transferable by
the Participant. Except as may be required by the federal income tax withholding provisions of the Code or by the tax laws of any State, the interests of the Participant and his or her beneficiaries under this Agreement are not subject to the claims
of their creditors and may not be voluntarily or involuntarily sold, transferred, alienated, assigned, pledged, anticipated, or encumbered. Any attempt by the Participant or a beneficiary to sell, transfer, alienate, assign, pledge, anticipate,
encumber, charge or otherwise dispose of any right to benefits payable hereunder shall be void. 
 Shareholder Rights. The
Participant shall not have any of the rights of a shareholder of the Company with respect to Stock Unit Awards, such as the right to vote. 
 Death Benefits. In the event of the death of the Participant, the Company shall transfer shares of Common Stock equal in number to the vested Stock Unit Awards, if any, credited to the Participant’s Stock Unit Account to
the Participant’s legal representative or beneficiaries. Such transfer shall be made within 30 days following death. 
 The Participant
may designate a beneficiary or beneficiaries (contingently, consecutively, or successively) of such death benefit and, from time to time, may change his or her designated beneficiary. A beneficiary may be a trust. A beneficiary designation shall be
made in writing in a form prescribed by the Company and delivered to the Company while the Participant is alive. If there is no designated beneficiary surviving at the death of the Participant, payment of any death benefit of the Participant shall
be made to the surviving spouse of the Participant, if any, and if no such surviving spouse to the estate of the Participant. 
 Integration. This Agreement, and the other documents referred to herein or delivered pursuant hereto which form a part hereof contain the entire understanding of the parties with respect to its subject matter. There are no
restrictions, agreements, promises, representations, warranties, covenants or undertakings with respect to the subject matter hereof other than those expressly set forth herein. This Agreement, including without limitation the Plan, supersedes all
prior agreements and understandings between the parties with respect to its subject matter. 
 Governing Law. This Agreement
shall be governed by and construed and enforced in accordance with the laws of the State of Delaware, without regard to the provisions governing conflict of laws. 
 Amendment. This Agreement may be amended by mutual consent of the parties hereto by written agreement. 

 Participant Acknowledgment. By accepting this grant, the Participant acknowledges receipt
of a copy of the Plan, and acknowledges that all decisions, determinations and interpretations of the Committee in respect of the Plan, this Agreement and the Stock Unit Awards granted hereunder shall be final and conclusive. 
  

			
	MEMC Electronic Materials, Inc.
		
	By:	 	  

	Title:

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