Document:

Pledge Agreement dated March 3, 2003

  Exhibit 10-aaa(2)

	 	PLEDGE AGREEMENT dated as of March 3, 2003 among MEMC ELECTRONIC MATERIALS, INC., a Delaware corporation ("Borrower"), each subsidiary of the Borrower listed on
Schedule I hereto (each such subsidiary individually a "Subsidiary Pledgor" and collectively, the "Subsidiary Pledgors"; the Borrower and the Subsidiary Pledgors are referred to herein individually as a "Pledgor" and
collectively as the "Pledgors") and CITICORP USA, INC., as collateral agent (in such capacity, the "Collateral Agent") for the Secured Parties (as defined in the Security Agreement).

 Reference is made to (a) the Revolving Credit Agreement dated as of December 5, 2002 (as amended, supplemented or otherwise modified from time to time, the "Revolving Credit Agreement"), among the
Borrower, the lenders from time to time party thereto (the "Lenders"), the Collateral Agent and Citicorp USA, Inc., as administrative agent for the Lenders (in such capacity, the "Administrative Agent") and (b) the Guarantee Agreement
dated as of March 3, 2003 (as amended, supplemented or otherwise modified from time to time, the "Guarantee Agreement") among the Subsidiary Pledgors and the Collateral Agent. Capitalized terms used herein and not defined herein shall have
meanings assigned to such terms in the Revolving Credit Agreement.
  The Lenders have agreed to make Loans to the Borrower pursuant to, and upon the terms and
subject to the conditions specified in, the Revolving Credit Agreement. The Pledgors have agreed to guarantee, among other things, all the obligations of the Borrower under the Revolving Credit Agreement on a senior subordinated basis as set forth
in Article X of the Revolving Credit Agreement and Article II of the Guarantee Agreement. The obligations of the Lenders to make Loans are conditioned upon, among other things, the execution and delivery by the Pledgors of a Pledge Agreement in the
form hereof to secure (a) the due and punctual payment of (i) the principal of and premium, if any, and interest (including interest accruing during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding,
regardless of whether allowed or allowable in such proceeding) on the Loans, when and as due, whether at maturity, by acceleration, upon one or more dates set for pre yment or otherwise and (ii) all other monetary obligations, including fees,
costs, expenses and indemnities, whether primary, secondary, direct, contingent, fixed or otherwise (including monetary obligations incurred during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding, regardless of
whether allowed or allowable in such proceeding), of the Loan Parties to the Secured Parties under the Revolving Credit Agreement and the other Loan Documents, (b) the due and punctual performance of all covenants, agreements, obligations and
liabilities of the Loan Parties under or pursuant to the Revolving Credit Agreement and the other Loan Documents, (c) unless otherwise agreed to in writing by the applicable Lender party thereto, the due and punctual payment and performance of
all obligations of the Borrower or any other Loan Party, monetary or otherwise, under each Hedging Agreement entered into with a counterparty that was a Lender (or an Affiliate of a Lender) at the time such Hedging Agreement was entered into and
(d) the due and punctual payment and performance of all obligations in respect of overdrafts and related liabilities owed to the Administrative Agent or any of its Affiliates and arising from treasury, depositary and cash management services in
connection with any automated clearing house transfers of funds (all the monetary and other obligations referred to in the preceding clauses (a) through (d) being referred to collectively as the "Investor Revolver Obligations").

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  Accordingly, the Pledgors and the Collateral Agent, on behalf of itself and each Secured Party (and each of their respective successors or
assigns), hereby agree as follows:
 SECTION 1. Pledge. As security for the payment and performance, as the case may be, in full of the Investor Revolver
Obligations, each Pledgor hereby pledges and grants to the Collateral Agent, its successors and assigns, and hereby grants to the Collateral Agent, its successors and assigns, for the ratable benefit of the Secured Parties, a security interest in
all of such Pledgor's right, title and interest in, to and under (a) the Equity Interests owned by it which are listed on Schedule II hereto and any Equity Interests obtained in the future by such Pledgor and the certificates representing
all such Equity Interests (the "Pledged Interests"); provided that the Pledged Interests shall not include (i) more than 65% of the issued and outstanding voting stock of any Foreign Subsidiary, (ii) the outstanding voting stock
of MEMC Korea Company, MEMC Kulim Electronic Materials, Sdn. Bhd., MEMC Southwest Inc. and Taisil Electronic Materials Corporation r (iii) to the extent that applicable law requires that a Subsidiary of such Pledgor issue directors' qualifying
shares, such qualifying shares; (b)(i) the debt securities owned by it which are listed opposite the name of such Pledgor on Schedule II hereto, (ii) any debt securities in the future issued to such Pledgor and (iii) the promissory notes
and any other instruments evidencing such debt securities (the "Pledged Debt Securities"); (c) all other property that may be delivered to and held by the Collateral Agent pursuant to the terms hereof; (d) subject to Section 5,
all payments of principal or interest, dividends, cash, instruments and other property from time to time received, receivable or otherwise distributed, in respect of, in exchange for or upon the conversion of the securities referred to in
clauses (a) and (b) above; (e) subject to Section 5, all rights and privileges of such Pledgor with respect to the securities and other property ref erred to in clauses (a), (b), (c) and (d) above; and (f) all proceeds
of any of the foregoing (the items referred to in clauses (a) through (f) above being collectively referred to as the "Collateral"). Upon delivery to the Collateral Agent, (a) any Pledged Interests, any Pledged Debt Securities
or any stock certificates, notes or other securities now or hereafter included in the Collateral (the "Pledged Securities") shall be accompanied by stock powers duly executed in blank or other instruments of transfer satisfactory to the
Collateral Agent and by such other instruments and documents as the Collateral Agent may reasonably request and (b) all other property comprising part of the Collateral shall be accompanied by proper instruments of assignment duly executed by
the applicable Pledgor and such other instruments or documents as the Collateral Agent may reasonably request. Each delivery of Pledged Securities shall be accompanied by a schedule describing the secur ities theretofore and then being pledged
hereunder, which schedule shall be attached hereto as Schedule II and made a part hereof. Each schedule so delivered shall supersede any prior schedules so delivered. 
  Any security interest granted hereunder shall be subject to the prior lien and security interest granted under the Bank Loan Documentation as security for the payment or performance, as the case may be, in full of the Bank Revolver
Obligations (the "Senior Security Interest"). 
  TO HAVE AND TO HOLD the Collateral, together with all right, title, interest, powers, privileges and
preferences pertaining or incidental thereto, unto the Collateral Agent, its successors and assigns, for the ratable benefit of the Secured Parties, forever; subject, however, to the terms, covenants and conditions hereinafter set
forth.
  SECTION 2. Delivery of the Collateral. (a) Each Pledgor agrees promptly to deliver or cause to be delivered to the Collateral Agent any and
all Pledged Securities, and any and all certificates or other instruments or documents representing the Collateral, unless such certificates, instruments or documents have already been delivered to and received by the Collateral Agent (as defined in
the Bank Loan Documentation).
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   (b) Each Pledgor will cause any Indebtedness for borrowed money owed to the Pledgor by any Person to be evidenced by a duly executed
promissory note that is pledged and delivered to the Collateral Agent pursuant to the terms thereof, unless such promissory note has already been delivered to and received by the Collateral Agent (as defined in the Bank Loan
Documentation).
 
  SECTION 3. Representations, Warranties and Covenants. Each Pledgor hereby represents, warrants and covenants, as to itself
and the Collateral pledged by it hereunder, to and with the Collateral Agent that:
  (a) the Pledged Interests represent that percentage as set forth on
Schedule II of the issued and outstanding shares of each class of the Equity Interests of the issuer with respect thereto;
 (b) except for the Senior Security
Interest, the lien and security interest granted under the Indenture Documentation as security for the payment or performance, as the case may be, of the Indenture Obligations and the security interest granted hereunder, such Pledgor (i) is and
will at all times continue to be the direct owner, beneficially and of record, of the Pledged Securities indicated on Schedule II, (ii) holds the same free and clear of all Liens other than Liens permitted pursuant to Section 6.02 of the
Revolving Credit Agreement, (iii) will make no assignment, pledge, hypothecation or transfer of, or create or permit to exist any security interest in or other Lien on, the Collateral, other than pursuant hereto, and (iv) subject to
Section 5, will cause any and all Collateral, whether for value paid by such Pledgor or otherwise, to be forthwith deposited with the Collateral Agent and pledged or assigned hereunder;
 (c) such Pledgor (i) has the power and authority to pledge the Collateral in the manner hereby done or contemplated and (ii) will defend its title or interest thereto or therein against any and
all Liens (other than the Liens created or permitted by the Loan Documents, the Bank Loan Documentation and the Indenture Documentation), however arising, of all Persons whomsoever;
 (d) no consent of any other Person (including stockholders or creditors of any Pledgor) and no consent or approval of any Governmental Authority or any securities exchange (other than consents already
obtained by the Borrower under the Bank Loan Documentation, the Indenture Documentation and the Italian Guaranty) was or is necessary to the validity of the pledge effected hereby;
 (e) by virtue of the execution and delivery by the Pledgors of this Agreement, when the Pledged Securities, certificates or other documents representing or evidencing the Collateral are delivered to the
Collateral Agent in accordance with this Agreement, the Collateral Agent will have a valid and perfected lien upon and security interest in such Pledged Securities as security for the payment and performance of the Investor Revolver Obligations
(subject only to the liens and security interest that comprise the Senior Security Interest);
 (f) the pledge effected hereby is effective to vest in the Collateral
Agent, on behalf of the Secured Parties, the rights of the Collateral Agent in the Collateral as set forth herein;
 (g) all of the Pledged Interests have been duly
authorized and validly issued and are fully paid and nonassessable;
 (h) all information set forth herein relating to the Pledged Interests is accurate and complete in
all material respects as of the date hereof; and
 (i) the pledge of the Pledged Interests pursuant to this Agreement does not violate Regulation T, U or X of the
Federal Reserve Board or any successor thereto as of the date hereof.
 
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  SECTION 4. Registration in Nominee Name; Denominations. The Collateral Agent, on behalf of the Secured Parties, shall have the right (in
its sole and absolute discretion) to hold the Pledged Securities in its own name as pledgee, the name of its nominee (as pledgee or as sub-agent) or the name of the Pledgors, endorsed or assigned in blank or in favor of the Collateral Agent. Each
Pledgor will promptly give to the Collateral Agent copies of any notices or other communications received by it with respect to Pledged Securities registered in the name of such Pledgor. The Collateral Agent shall at all times have the right to
exchange the certificates representing Pledged Securities for certificates of smaller or larger denominations for any purpose consistent with this Agreement.
  SECTION 5. Voting Rights; Dividends and Interest, etc. (a) Unless and until an Event of Default shall have occurred and be continuing:
   (i) Each Pledgor shall be entitled to exercise any and all voting and/or other consensual rights and powers inuring to an owner of Pledged Securities or any part thereof for any purpose consistent with
the terms of this Agreement, the Revolving Credit Agreement and the other Loan Documents; provided, however, that such Pledgor will not be entitled to exercise any such right if the result thereof could materially and adversely affect
the rights inuring to a holder of the Pledged Securities or the rights and remedies of any of the Secured Parties under this Agreement or the Revolving Credit Agreement or any other Loan Document or the ability of the Secured Parties to exercise the
same.
 (ii) The Collateral Agent shall execute and deliver to each Pledgor, or cause to be executed and delivered to each Pledgor, all such proxies, powers of attorney
and other instruments as such Pledgor may reasonably request for the purpose of enabling such Pledgor to exercise the voting and/or consensual rights and powers it is entitled to exercise pursuant to subparagraph (i) above and to receive the
cash dividends it is entitled to receive pursuant to subparagraph (iii) below.
 (iii) Each Pledgor shall be entitled to receive and retain any and all cash dividends,
interest and principal paid on the Pledged Securities to the extent and only to the extent that such cash dividends, interest and principal are permitted by, and otherwise paid in accordance with, the terms and conditions of the Revolving Credit
Agreement, the other Loan Documents and applicable laws. All noncash dividends, interest and principal, and all dividends, interest and principal paid or payable in cash or otherwise in connection with a partial or total liquidation or dissolution,
return of capital, capital surplus or paid-in surplus, and all other distributions (other than distributions referred to in the preceding sentence) made on or in respect of the Pledged Securities, whether paid or payable in cash or otherwise,
whether resulting from a subdivision, combination or reclassification of the outstanding capital stock of the issuer of any Pledged Securities or received in exchange for Pl ged Securities or any part thereof, or in redemption thereof, or as a
result of any merger, consolidation, acquisition or other exchange of assets to which such issuer may be a party or otherwise, shall be and become part of the Collateral, and, if received by any Pledgor, shall not be commingled by such Pledgor with
any of its other funds or property but shall be held separate and apart therefrom, shall be held in trust for the benefit of the Collateral Agent and shall be forthwith delivered to the Collateral Agent in the same form as so received (with any
necessary endorsement).
 (iv) With regard to the pledge of the shares of MEMC Electronic Materials S.p.A, the Collateral Agent shall take all reasonable actions
required by applicable mandatory provisions of Italian law in order to enable the Pledgors to exercise all the rights to which the Pledgors are entitled under this Section 5.
 
 
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  (b) Upon the occurrence and during the continuance of an Event of Default, all rights
of any Pledgor to dividends, interest or principal that such Pledgor is authorized to receive pursuant to paragraph (a)(iii) above shall cease, and all such rights shall thereupon become vested in the Collateral Agent, which shall subject to
the provisions of this paragraph (b) have the sole and exclusive right and authority to receive and retain such dividends, interest or principal. All dividends, interest or principal received by the Pledgor contrary to the provisions of this
Section 5 shall be held in trust for the benefit of the Collateral Agent, shall be segregated from other property or funds of such Pledgor and shall be forthwith delivered to the Collateral Agent upon demand in the same form as so received
(with any necessary endorsement). Any and all money and other property paid over to or received by the Collateral Agent pursuant to the provisions of this paragraph (b) hall be retained by the Collateral Agent in an account to be established by
the Collateral Agent upon receipt of such money or other property and shall be applied in accordance with the provisions of Section 7. After all Events of Default have been cured or waived, the Collateral Agent shall promptly repay to each
Pledgor all cash dividends, interest or principal (without interest), that such Pledgor would otherwise be permitted to retain pursuant to the terms of paragraph (a)(iii) above and which remain in such account.
 (c) Upon the occurrence and during the continuance of an Event of Default, all rights of any Pledgor to exercise the voting and consensual rights and powers it is entitled to
exercise pursuant to paragraph (a)(i) of this Section 5, and the obligations of the Collateral Agent under paragraph (a)(ii) of this Section 5, shall cease, and all such rights shall thereupon become vested in the Collateral
Agent, which shall have the sole and exclusive right and authority to exercise such voting and consensual rights and powers, provided that, unless otherwise directed by the Required Lenders, the Collateral Agent shall have the right from time
to time following and during the continuance of an Event of Default to permit the Pledgors to exercise such rights. After all Events of Default have been cured or waived, each Pledgor will have the right to exercise the voting and consensual rights
and powers that it would otherwise be entitled to exercise pursuant to the term of paragraph (a)(i) above.
  SECTION 6. Remedies upon Default. Upon the occurrence and
during the continuance of an Event of Default, subject to applicable regulatory and legal requirements, the Collateral Agent may sell the Collateral, or any part thereof, at public or private sale or at any broker's board or on any securities
exchange, for cash, upon credit or for future delivery as the Collateral Agent shall deem appropriate. The Collateral Agent shall be authorized at any such sale (if it deems it advisable to do so) to restrict the prospective bidders or purchasers to
Persons who will represent and agree that they are purchasing the Collateral for their own account for investment and not with a view to the distribution or sale thereof, and upon consummation of any such sale the Collateral Agent shall have the
right to assign, transfer and deliver to the purchaser or purchasers thereof the Collateral so sold. Each such purchaser at any such sale shall hold the property sold absolutely free from any claim or right on e part of any Pledgor, and, to the
extent permitted by applicable law, the Pledgors hereby waive all rights of redemption, stay, valuation and appraisal any Pledgor now has or may at any time in the future have under any rule of law or statute now existing or hereafter
enacted.
 The Collateral Agent shall give a Pledgor 10 days' prior written notice (which each Pledgor agrees is a "reasonable authenticated notification of disposition"
within the meaning of Section 9-611 of the UCC (as defined in the Security Agreement) of the Collateral Agent's intention to make any sale of such Pledgor's Collateral. Such notice, in the case of a public sale, shall state the time and place
for such sale and, in the case of a sale at a broker's board or on a securities exchange, shall state the board or exchange at which such sale is to be made and the day on which the Collateral, or portion thereof, will first be offered for sale at
such board or exchange. Any such public sale shall be held at such time or times within ordinary business hours and at such place or places as the Collateral Agent may fix and state in the notice of such sale. At any such sale, the Collateral, or
portion thereof, to be sold may be sold in one lot as an entirety or in separate parcels, as the ollateral Agent may (in its sole and absolute 
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  discretion) determine. The Collateral Agent shall not be obligated to make any sale of any Collateral if it shall determine not to do so,
regardless of the fact that notice of sale of such Collateral shall have been given. The Collateral Agent may, without notice or publication, adjourn any public or private sale or cause the same to be adjourned from time to time by announcement at
the time and place fixed for sale, and such sale may, without further notice, be made at the time and place to which the same was so adjourned. In case any sale of all or any part of the Collateral is made on credit or for future delivery, the
Collateral so sold may be retained by the Collateral Agent until the sale price is paid in full by the purchaser or purchasers thereof, but the Collateral Agent shall not incur any liability in case any such purchaser or purchasers shall fail to
take up and pay for the Collateral so sold and, in case of any such failure, such Collateral may be s old again upon like notice. At any public (or, to the extent permitted by applicable law, private) sale made pursuant to this Section 6, any
Secured Party may bid for or purchase, free from any right of redemption, stay or appraisal on the part of any Pledgor (all said rights being also hereby waived and released), the Collateral or any part thereof offered for sale and may make payment
on account thereof by using any Investor Revolver Obligation then due and payable to it from such Pledgor as a credit against the purchase price, and it may, upon compliance with the terms of sale, hold, retain and dispose of such property without
further accountability to such Pledgor therefor. For purposes hereof, (a) a written agreement to purchase the Collateral or any portion thereof shall be treated as a sale thereof, (b) the Collateral Agent shall be free to carry out such
sale pursuant to such agreement and (c) such Pledgor shall not be entitled to the return of the Collateral or any portion thereof sub ject thereto, notwithstanding the fact that after the Collateral Agent shall have entered into such an agreement
all Events of Default shall have been remedied and the Investor Revolver Obligations paid in full. As an alternative to exercising the power of sale herein conferred upon it, the Collateral Agent may proceed by a suit or suits at law or in equity to
foreclose upon the Collateral and to sell the Collateral or any portion thereof pursuant to a judgment or decree of a court or courts having competent jurisdiction or pursuant to a proceeding by a court-appointed receiver.
  SECTION 7. Application of Proceeds of Sale. The Collateral Agent shall apply the proceeds of any collection or sale of the Collateral, as well as any Collateral
consisting of cash, as follows:
   FIRST, to the payment in full of any Bank Revolver Obligations outstanding, to the extent that the Bank Loan
Documentation is in force;
 SECOND, to the payment of all costs and reasonable expenses incurred by the Administrative Agent or the Collateral Agent (in its capacity as
such hereunder or under any other Loan Document) in connection with such collection or sale or otherwise in connection with this Agreement or any of the Investor Revolver Obligations, including all court costs and the reasonable fees and expenses of
its agents and legal counsel, the repayment of all advances made by the Collateral Agent hereunder or under any other Loan Document on behalf of any Pledgor and any other costs or expenses incurred in connection with the exercise of any right or
remedy hereunder or under any other Loan Document;
 SECOND, to the payment in full of the Investor Revolver Obligations (the amounts so applied to be distributed among
the Secured Parties pro rata in accordance with the amounts of the Investor Revolver Obligations owed to them on the date of any such distribution); 
 THIRD, to the
payment in full of the Indenture Obligations outstanding; and
 FOURTH, to the Pledgors, their successors or assigns, or as a court of competent jurisdiction may
otherwise direct.
 
 The Collateral Agent shall have absolute discretion as to the time of application of any such proceeds, 
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  moneys or balances in accordance with this Agreement. Upon any sale of the Collateral by the Collateral Agent (including pursuant to a power of
sale granted by statute or under a judicial proceeding), the receipt of the purchase money by the Collateral Agent or of the officer making the sale shall be a sufficient discharge to the purchaser or purchasers of the Collateral so sold and such
purchaser or purchasers shall not be obligated to see to the application of any part of the purchase money paid over to the Collateral Agent or such officer or be answerable in any way for the misapplication thereof.
 SECTION 8. Reimbursement of Collateral Agent.  (a)  Each Pledgor agrees to pay upon demand to the Collateral Agent the amount of any and all reasonable
expenses, including the reasonable fees, other charges and disbursements of its counsel and of any experts or agents, that the Collateral Agent may incur in connection with (i) the administration of this Agreement, (ii) the custody or
preservation of, or the sale of, collection from, or other realization upon, any of the Collateral, (iii) the exercise or enforcement of any of the rights of the Collateral Agent hereunder or (iv) the failure by such Pledgor to perform or
observe any of the provisions hereof.
 (b) Without limitation of its indemnification obligations under the other Loan Documents, each Pledgor agrees to indemnify the
Collateral Agent and the Indemnitees (as defined in Section 11.03 of the Revolving Credit Agreement) against, and hold each Indemnitee harmless from, any and all losses, claims, damages, liabilities and related expenses, including reasonable counsel
fees, other charges and disbursements, incurred by or asserted against any Indemnitee arising out of, in any way connected with, or as a result of (i) the execution or delivery of this Agreement or any other Loan Document or any agreement or
instrument contemplated hereby or thereby, the performance by the parties hereto of their respective obligations thereunder or the consummation of the other transactions contemplated thereby or (ii) any claim, litigation, investigation or
proceeding relating to any of the foregoing, whether or not any Indemnitee is a party thereto, provided that such indemnity hall not, as to any Indemnitee, be available to the extent that such losses, claims, damages, liabilities or related
expenses are determined by a court of competent jurisdiction by final and nonappealable judgment to have resulted from the gross negligence or willful misconduct of such Indemnitee.
 (c) Any amounts payable as provided hereunder shall be additional Investor Revolver Obligations secured hereby and by the other Security Documents. The provisions of this Section 8 shall remain
operative and in full force and effect regardless of the termination of this Agreement, the consummation of the transactions contemplated hereby, the repayment of any of the Investor Revolver Obligations, the invalidity or unenforceability of any
term or provision of this Agreement or any other Loan Document or any investigation made by or on behalf of the Collateral Agent or any other Secured Party. All amounts due under this Section 8 shall be payable on written demand therefor and
shall bear interest at the rate specified in Section 2.10(c) of the Revolving Credit Agreement. 
 SECTION 9. Collateral Agent Appointed Attorney-in-Fact.
Each Pledgor hereby appoints the Collateral Agent the attorney-in-fact of such Pledgor for the purpose of carrying out the provisions of this Agreement and taking any action and executing any instrument that the Collateral Agent may deem necessary
or advisable to accomplish the purposes hereof, which appointment is irrevocable and coupled with an interest. Without limiting the generality of the foregoing, the Collateral Agent shall have the right, upon the occurrence and during the
continuance of an Event of Default, with full power of substitution either in the Collateral Agent's name or in the name of such Pledgor, to ask for, demand, sue for, collect, receive and give acquittance for any and all moneys due or to become due
under and by virtue of any Collateral, to endorse checks, drafts, orders and other instruments for the payment of money payable to the Pledgor representing any interest or dividend or other distribut n payable in respect of the Collateral or any
part thereof or on account thereof and to give full discharge for the same, to settle, compromise, prosecute or defend any action, claim or proceeding with respect thereto, and to sell, assign, endorse, pledge, transfer and to make any agreement
respecting, or otherwise deal with, the 
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  same; provided, however, that nothing herein contained shall be construed
as requiring or obligating the Collateral Agent to make any commitment or to make any inquiry as to the nature or sufficiency of any payment received by the Collateral Agent, or to present or file any claim or notice, or to take any action with
respect to the Collateral or any part thereof or the moneys due or to become due in respect thereof or any property covered thereby. The Collateral Agent and the other Secured Parties shall be accountable only for amounts actually received as a
result of the exercise of the powers granted to them herein, and neither they nor their officers, directors, empl oyees or agents shall be responsible to any Pledgor for any act or failure to act hereunder, except for their own gross negligence or
willful misconduct.
 SECTION 10. Waivers; Amendment.  (a)  No failure or delay of the Collateral Agent in exercising any power or right
hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such a right or power, preclude any other or further exercise thereof or the
exercise of any other right or power. The rights and remedies of the Collateral Agent hereunder and of the other Secured Parties under the other Loan Documents are cumulative and are not exclusive of any rights or remedies that they would otherwise
have. No waiver of any provisions of this Agreement or consent to any departure by any Pledgor therefrom shall in any event be effective unless the same shall be permitted by paragraph (b) below, and then such waiver or consent shall be
effective only in the specific instance and for the purpose for which given. No notice or demand on any Pledgor in an case shall entitle such Pledgor to any other or further notice or demand in similar or other circumstances.
 (b) Neither this Agreement nor any provision hereof may be waived, amended or modified except pursuant to a written agreement entered into between the Collateral Agent and the
Pledgor or Pledgors with respect to which such waiver, amendment or modification is to apply, subject to any consent required in accordance with Section 11.02 of the Revolving Credit Agreement.
 SECTION 11. Securities Act, etc. In view of the position of the Pledgors in relation to the Pledged Securities, or because of other current or future circumstances, a question may arise under the
Securities Act of 1933, as now or hereafter in effect, or any similar statute hereafter enacted analogous in purpose or effect (such Act and any such similar statute as from time to time in effect being called the "Federal Securities Laws")
with respect to any disposition of the Pledged Securities permitted hereunder. Each Pledgor understands that compliance with the Federal Securities Laws might very strictly limit the course of conduct of the Collateral Agent if the Collateral Agent
were to attempt to dispose of all or any part of the Pledged Securities, and might also limit the extent to which or the manner in which any subsequent transferee of any Pledged Securities could dispose of the same. Similarly, there may be other
legal restrictions or limitations affecting the Coll eral Agent in any attempt to dispose of all or part of the Pledged Securities under applicable Blue Sky or other state securities laws or similar laws analogous in purpose or effect. Each Pledgor
recognizes that in light of such restrictions and limitations the Collateral Agent may, with respect to any sale of the Pledged Securities, limit the purchasers to those who will agree, among other things, to acquire such Pledged Securities for
their own account, for investment, and not with a view to the distribution or resale thereof. Each Pledgor acknowledges and agrees that in light of such restrictions and limitations, the Collateral Agent, in its sole and absolute discretion,
(a) may proceed to make such a sale whether or not a registration statement for the purpose of registering such Pledged Securities or part thereof shall have been filed under the Federal Securities Laws and (b) may approach and negotiate
with a single potential purchaser to effect such sale, in either case in accordance with a v alid exemption from registration under the Federal Securities Laws. Each Pledgor acknowledges and agrees that any such sale might result in prices and other
terms less favorable to the seller than if such sale were a public sale without such restrictions. In the event of any such sale, the Collateral Agent shall incur no responsibility or liability for selling all or any part of the Pledged Securities
at a price that the Collateral Agent, in its sole and absolute discretion, may in good faith deem 
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  reasonable under the circumstances, notwithstanding the possibility that a substantially higher price might have been realized if the sale were
deferred until after registration as aforesaid or if more than a single purchaser were approached. The provisions of this Section 11 will apply notwithstanding the existence of a public or private market upon which the quotations or sales
prices may exceed substantially the price at which the Collateral Agent sells.
 SECTION 12. Registration, etc. Each Pledgor agrees that, upon the occurrence and
during the continuance of an Event of Default, if for any reason the Collateral Agent desires to sell any of the Pledged Securities at a public sale, it will, at any time and from time to time, upon the written request of the Collateral Agent, use
its reasonable best efforts to take or to cause the issuer of such Pledged Securities to take such action and prepare, distribute and/or file such documents, as are required or advisable in the reasonable opinion of counsel for the Collateral Agent
to permit the public sale of such Pledged Securities. Each Pledgor further agrees to indemnify, defend and hold harmless the Collateral Agent, each other Secured Party, any underwriter and their respective officers, directors, affiliates and
controlling Persons from and against all loss, liability, expenses, costs of counsel (including, without limitation, reasonable fees and expenses to the Collateral Agent o legal counsel), and claims (including the costs of investigation) that they
may incur insofar as such loss, liability, expense or claim arises out of or is based upon any alleged untrue statement of a material fact contained in any prospectus (or any amendment or supplement thereto) or in any notification or offering
circular, or arises out of or is based upon any alleged omission to state a material fact required to be stated therein or necessary to make the statements in any thereof not misleading, except insofar as the same may have been caused by any untrue
statement or omission based upon information furnished in writing to such Pledgor or the issuer of such Pledged Securities by the Collateral Agent or any other Secured Party expressly for use therein. Each Pledgor further agrees, upon such written
request referred to above, to use its reasonable best efforts to qualify, file or register, or cause the issuer of such Pledged Securities to qualify, file or register, any of the Pledged Securities under th e Blue Sky or other securities laws of
such states as may be requested by the Collateral Agent and keep effective, or cause to be kept effective, all such qualifications, filings or registrations. Each Pledgor will bear all costs and expenses of carrying out its obligations under this
Section 12. Each Pledgor acknowledges that there is no adequate remedy at law for failure by it to comply with the provisions of this Section 12 and that such failure would not be adequately compensable in damages, and therefore agrees
that its agreements contained in this Section 12 may be specifically enforced.
 SECTION 13. Security Interest Absolute. All rights of the Collateral Agent
hereunder, the grant of a security interest in the Collateral and all obligations of each Pledgor hereunder, shall be absolute and unconditional irrespective of (a) any lack of validity or enforceability of the Revolving Credit Agreement, any
other Loan Document, any agreement with respect to any of the Investor Revolver Obligations or any other agreement or instrument relating to any of the foregoing, (b) any change in the time, manner or place of payment of, or in any other term
of, all or any of the Investor Revolver Obligations, or any other amendment or waiver of or any consent to any departure from the Revolving Credit Agreement, any other Loan Document or any other agreement or instrument relating to any of the
foregoing, (c) any exchange, release or nonperfection of any other collateral, or any release or amendment or waiver of or consent to or departure from any guaranty, for all r any of the Investor Revolver Obligations or (d) any other
circumstance that might otherwise constitute a defense available to, or a discharge of, any Pledgor in respect of the Investor Revolver Obligations or in respect of this Agreement (other than the indefeasible payment in full of all the Investor
Revolver Obligations).
 SECTION 14. Termination or Release. (a)  This Agreement and the security interests granted hereby shall terminate when all the
Investor Revolver Obligations have been performed or indefeasibly paid in full in cash, as applicable and the Lenders have no further commitment to lend under the Revolving Credit Agreement.
 9 of 18

  (b) Upon any sale or other transfer by any Pledgor of any Collateral that is permitted under the Revolving Credit Agreement to any Person that is
not a Pledgor, or, upon the effectiveness of any written consent to the release of the security interest granted hereby in any Collateral pursuant to Section 11.02 of the Revolving Credit Agreement, the security interest in such Collateral shall be
automatically released.
 (c) In connection with any termination or release pursuant to paragraph (a) or (b) or Section 17, the Collateral Agent shall execute
and deliver to any Pledgor, at such Pledgor's expense, all documents that such Pledgor shall reasonably request to evidence such termination or release. Any execution and delivery of documents pursuant to this Section 14 shall be without
recourse to or warranty by the Collateral Agent.
 SECTION 15. Notices. All communications and notices hereunder shall be in writing and given as provided in
Section 11.01 of the Revolving Credit Agreement. All communications and notices hereunder to any Subsidiary Pledgor shall be given to it at the address or telecopy number set forth on Schedule I, with a copy to the Borrower.
 SECTION 16. Further Assurances. Each Pledgor agrees to do such further acts and things, and to execute and deliver such additional conveyances, assignments, agreements and
instruments, as the Collateral Agent may at any time reasonably request in connection with the administration and enforcement of this Agreement or with respect to the Collateral or any part thereof or in order better to assure and confirm unto the
Collateral Agent its rights and remedies hereunder.
 SECTION 17. Binding Effect; Several Agreement; Assignments. Whenever in this Agreement any of the parties
hereto is referred to, such reference shall be deemed to include the successors and assigns of such party; and all covenants, promises and agreements by or on behalf of any Pledgor that are contained in this Agreement shall bind and inure to the
benefit of its successors and assigns. This Agreement shall become effective as to any Pledgor when a counterpart hereof executed on behalf of such Pledgor shall have been delivered to the Collateral Agent and a counterpart hereof shall have been
executed on behalf of the Collateral Agent, and thereafter shall be binding upon such Pledgor and the Collateral Agent and their respective successors and assigns, and shall inure to the benefit of such Pledgor, the Collateral Agent and the other
Secured Parties, and their respective successors and assigns, except that no Pledgor shall have the right to assign its rights hereunder or any i erest herein or in the Collateral (and any such attempted assignment shall be void), except as
expressly contemplated by this Agreement or the other Loan Documents. In the event that a Pledgor ceases to be a Subsidiary pursuant to a transaction permitted under the Loan Documents, such Pledgor shall be released from its obligations under this
Agreement without further action. This Agreement shall be construed as a separate agreement with respect to each Pledgor and may be amended, modified, supplemented, waived or released with respect to any Pledgor without the approval of any other
Pledgor and without affecting the obligations of any other Pledgor hereunder.
 SECTION 18. Survival of Agreement; Severability.  (a)  All
covenants, agreements, representations and warranties made by each Pledgor herein and in the certificates or other instruments prepared or delivered in connection with or pursuant to this Agreement or any other Loan Document shall be considered to
have been relied upon by the Collateral Agent and the other Secured Parties and shall survive the making of the Loans by the Lenders regardless of any investigation made by the Secured Parties or on their behalf, and shall continue in full force and
effect as long as any Investor Revolver Obligation remains unpaid and as long as the Commitments have not been terminated.
 (b) In the event any one or more of the
provisions contained in this Agreement should be held invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining 
 10
of 18

  provisions contained herein shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular
provision in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties shall endeavor in good-faith negotiations to replace the invalid, illegal or unenforceable provisions
with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions.
 SECTION 19. GOVERNING
LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.
 SECTION 20. Counterparts. This Agreement
may be executed in two or more counterparts, each of which shall constitute an original, but all of which, when taken together, shall constitute a single contract, and shall become effective as provided in Section 17. Delivery of an executed
counterpart of a signature page to this Agreement by facsimile transmission shall be as effective as delivery of a manually executed counterpart of this Agreement.
 SECTION 21. Rules of Interpretation. The rules of interpretation specified in Section 1.02 of the Revolving Credit Agreement shall be applicable to this Agreement. Section headings used herein are for convenience of
reference only, are not part of this Agreement and are not to affect the construction of, or to be taken into consideration in interpreting this Agreement.
 SECTION 22. Jurisdiction; Consent to Service of Process.  (a)  Each Pledgor hereby irrevocably and unconditionally submits, for itself and its property, to the nonexclusive jurisdiction of any New York State
court or Federal court of the United States of America sitting in New York City, and any appellate court from any thereof, in any action or proceeding arising out of or relating to this Agreement or the other Loan Documents, or for recognition or
enforcement of any judgment, and each of the parties hereto hereby irrevocably and unconditionally agrees that, to the extent permitted by applicable law, all claims in respect of any such action or proceeding may be heard and determined in such New
York State or, to the extent permitted by law, in such Federal court. Each of the parties hereto agrees that a final judgment in any such action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or
in any other anner provided by law. Nothing in this Agreement shall affect any right that the Collateral Agent or any other Secured Party may otherwise have to bring any action or proceeding relating to this Agreement or the other Loan Documents
against any Pledgor or its properties in the courts of any jurisdiction.
 (b) Each Pledgor hereby irrevocably and unconditionally waives, to the fullest extent it may
legally and effectively do so, any objection that it may now or hereafter have to the laying of venue of any suit, action or proceeding arising out of or relating to this Agreement or the other Loan Documents in any New York State or Federal court.
Each of the parties hereto hereby irrevocably waives, to the fullest extent permitted by law, the defense of an inconvenient forum to the maintenance of such action or proceeding in any such court.
 (c) Each party to this Agreement irrevocably consents to service of process in the manner provided for notices in Section 15. Nothing in this Agreement will affect the right of any party to this
Agreement to serve process in any other manner permitted by law.
 SECTION 23. WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT. EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE,

 11 of 18

  AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK
TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.
 SECTION 24. Limitation on Security Interest. Anything contained in this Agreement to the contrary notwithstanding, the obligation hereunder secured by each Subsidiary Pledgor
shall be limited to a maximum aggregate amount equal to the greatest amount that would not render such Subsidiary Pledgor's secured obligations hereunder subject to avoidance as a fraudulent transfer or conveyance under Section 548 of Title 11 of
the United States Code or any provisions of applicable state law (collectively, the "Fraudulent Transfer Laws"), in each case after giving effect to all liabilities of such Subsidiary Pledgor, contingent or otherwise, that would be taken into
account in determining whether the incurrence of the obligation would constitute a fraudulent conveyance under the Fraudulent Transfer Laws and after giving effect, both in determining such Subsidiary Pledgor's probable debt hereunder and in
determining its assets, to the existence of any rights to subrogation, co ribution, reimbursement, indemnity or similar rights of such Subsidiary Pledgor pursuant to (a) applicable law or (b) any agreement, including the Indemnity, Subrogation and
Contribution Agreement.
  
 SECTION 25. Additional Pledgors. Pursuant to Section 5.12 of the Revolving Credit Agreement, each Subsidiary Loan Party that was not
in existence or not a Subsidiary Loan Party on the date of the Revolving Credit Agreement is required to enter into this Agreement as a Subsidiary Pledgor upon becoming a Subsidiary Loan Party. Upon execution and delivery by the Collateral Agent and
a Subsidiary of an instrument in the form of Annex 1, such Subsidiary shall become a Subsidiary Pledgor hereunder with the same force and effect as if originally named as a Subsidiary Pledgor herein. The execution and delivery of such
instrument shall not require the consent of any Pledgor hereunder. The rights and obligations of each Pledgor hereunder shall remain in full force and effect notwithstanding the addition of any new Subsidiary Pledgor as a party to this
Agreement.
 IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of the day and year first above written.

	  	 MEMC ELECTRONIC MATERIALS, INC., 
 as Issuer
 
 By: /s/ James M. Stolze
 Name: James M. Stolze
 Title: Executive Vice President, Chief
Financial Officer  
	  	  
	  	 By /s/ Kenneth L. Young
 Name: Kenneth L. Young
 Title: Treasurer  

 12 of
18

  

	  
	  	 EACH OF THRE SUBSIDIARIES LISTD ON SCHEDULE I HERETO
 By /s/ Kenneth L. Young
 Name: Kenneth
L. Young, in his capacity as Treasuer for each of the Subsidiaries listed on Schedule I hereto  
	  
	  	 CITIBANK, N.A., as Trustee
 
 By: /s/ Allen Fisher
 Name: Allen Fisher
 Title: Vice President  

  
 
 Schedule I to the
 Pledge Agreement
 SUBSIDIARY PLEDGORS

	 Name  	 Address  	 County  
	  	  	  
	 MEMC International, Inc.  	 501 Pearl Drive
 P. O. Box 8
 St. Peters, MO 63376  	 St. Charles  
	 
 	 
 	 
 
	 MEMC Pasadena, Inc.  	 3000 North South Street
 Pasadena, TX 77503  	 Harris  
	  	  	  
	 MEMC Southwest Inc.  	 6800 Highway 75 South
 Sherman, TX 75090  	 Grayson  
	  	  	  
	 PlasmaSil, LLC  	 501 Pearl Drive
 P. O. Box 8
 St. Peters, MO 63376  	 St. Charles  
	 	 	 
	 SiBond, LLC  	 501 Pearl Drive
 P. O. Box 8
 St. Peters, MO 63376 	 St. Charles  

 13 of 18

  

	 
	  	  	  
	 MEMC Holdings Corporation  	 501 Pearl Drive
 P. O. Box 8
 St. Peters, MO 63376  	 St. Charles
 

  
 
 Schedule II to the
 Pledge Agreement
  
 CAPITAL STOCK OR OTHER EQUITY INTERESTS
 
	 Issuer  	 Number of
 Certificate  	 Registered
 Owner   	 Number and
 Class of
 Shares
 or Other
 Equity
 Interests  	 Percentage
 of
 Shares
 or Other
 Equity
 Interests  
	  	  	  	  	  
 

   
  
  
  
 DEBT SECURITIES
 
	 Issuer  	 Principal
 Amount    	 Date of Note  	 Maturity Date
 

   
  
 14 of 18

  
 Annex 1 to the
 Pledge Agreement
 

	 	SUPPLEMENT NO. [ ] dated as of [ ] to the PLEDGE AGREEMENT dated as of March 3, 2003, among MEMC ELECTRONIC MATERIALS, INC., a Delaware corporation, the "Borrower"), each
subsidiary of Borrower listed on Schedule I thereto (each such subsidiary individually a "Subsidiary Pledgor"and collectively, the "Subsidiary Pledgors"; the Borrower and the Subsidiary Pledgors are referred to herein individually
as a "Pledgor" and collectively as the "Pledgors") and CITICORP USA, INC., as collateral agent (in such capacity, the "Collateral Agent") for the Secured Parties (as defined in the Security Agreement).

  A. Reference is made to (a) the Revolving Credit Agreement dated as of December 5, 2002 (as amended, supplemented or
otherwise modified from time to time, the "Revolving Credit Agreement"), among the Borrower, the lenders from time to time party thereto (the "Lenders"), the Collateral Agent and Citicorp USA, Inc., as administrative agent for the
Lenders (in such capacity, the "Administrative Agent") and (b) the Guarantee Agreement dated as of March 3, 2003 (as amended, supplemented or otherwise modified from time to time, the "Guarantee Agreement") among the Subsidiary
Pledgors and the Collateral Agent. 
 B. Capitalized terms used herein and not defined herein shall have meanings assigned to such terms in the Revolving Credit
Agreement.

	 	A.	The Pledgors have entered into the Pledge Agreement in order to induce the Lenders to make Loans. Pursuant to Section  5.12 of the Revolving Credit Agreement, each
Subsidiary Loan Party that was not in existence or not a Subsidiary Loan Party on the date of the Revolving Credit Agreement is required to enter into the Pledge Agreement as a Subsidiary Pledgor upon becoming a Subsidiary Loan Party.
Section 25 of the Pledge Agreement provides that such Subsidiaries may become Subsidiary Pledgors under the Pledge Agreement by execution and delivery of an instrument in the form of this Supplement. The undersigned Subsidiary (the "New
Pledgor") is executing this Supplement in accordance with the requirements of the Revolving Credit Agreement to become a Subsidiary Pledgor under the Pledge Agreement in order to induce the Lenders to make additional Loans and as consideration
for Loans previously made.

 Accordingly, the Collateral Agent and the New Pledgor agree as follows:
 SECTION 1. In accordance with Section 25 of the Pledge Agreement, the New Pledgor by its signature below becomes a Pledgor under the Pledge Agreement with the same force and effect as if
originally 
 15 of 18

  named therein as a Pledgor and the New Pledgor hereby agrees (a) to all the terms and provisions of the Pledge Agreement applicable to it as
a Pledgor thereunder and (b) represents and warrants that the representations and warranties made by it as a Pledgor thereunder are true and correct on and as of the date hereof except to the extent a representation and warranty expressly
relates solely to a specific date in which case such representation and warranty shall be true and correct on such date. In furtherance of the foregoing, the New Pledgor, as security for the payment and performance in full of the Investor Revolver
Obligations (as defined in the Pledge Agreement), does hereby create and grant to the Collateral Agent, its successors and assigns, for the benefit of t Secured Parties, their successors and assigns, a security interest in and lien on all of the New
Pledgor's right, title and interest in and to the Collateral (as defined in the Pledge Agreement) of the New Pledgor. Each reference to a "Subsidiary Pledgor" or a "Pledgor" in the Pledge Agreement shall be deemed to include the New Pledgor. The
Pledge Agreement is hereby incorporated herein by reference.
 SECTION 2. The New Pledgor represents and warrants to the Collateral Agent and the other Secured Parties
that this Supplement has been duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms.
 SECTION 3. This Supplement may be executed in counterparts, each of which shall constitute an original, but all of which when taken together shall constitute a single contract. This Supplement shall
become effective when the Collateral Agent shall have received counterparts of this Supplement that, when taken together, bear the signatures of the New Pledgor and the Collateral Agent. Delivery of an executed signature page to this Supplement by
facsimile transmission shall be as effective as delivery of a manually signed counterpart of this Supplement.
 SECTION 4. The New Pledgor hereby represents and warrants
that set forth on Schedule I attached hereto is a true and correct schedule of all its Pledged Securities.
 SECTION 5. Except as expressly supplemented hereby, the
Pledge Agreement shall remain in full force and effect.
 SECTION 6. THIS SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF
NEW YORK.
 SECTION 7. In case any one or more of the provisions contained in this Supplement should be held invalid, illegal or unenforceable in any respect,
neither party hereto shall be required to comply with such provision for so long as such provision is held to be invalid, illegal or unenforceable, but the validity, legality and enforceability of the remaining provisions contained herein and in the
Pledge Agreement shall not in any way be affected or impaired (it being understood that the invalidity of a particular provision in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other
jurisdiction). The parties hereto shall endeavor in good-faith negotiations to replace the invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or
unenforceable provisions.
 SECTION 8. All communications and notices hereunder shall be in writing and given as provided in Section 15 of the Pledge Agreement. All
communications and notices hereunder to the New Pledgor shall be given to it at the address set forth under its signature hereto, below, with a copy to the Borrower.
 SECTION 9. The New Pledgor agrees to reimburse the Collateral Agent for its reasonable out-of-pocket expenses in connection with this Supplement, including the reasonable fees, other charges and disbursements of counsel for the Collateral
Agent.
 16 of 18

  IN WITNESS WHEREOF, the New Pledgor and the Collateral Agent have duly executed this Supplement to the Pledge Agreement as of the day and year
first above written.
 [NAME OF NEW PLEDGOR],
  

	 	By_____________________________________
	 	Name:
 Title:
 Address:
	 	 
	 	CITICORP USA, INC., as Collateral Agent,
	 	 
	 	 
	 	By______________________________________
 Name:
 Title:

 
      
   
 
 
 
 
 
 
 
 
 
 Schedule I to
 Supplement No. [ ]
 to the Pledge Agreement
 Pledged Securities of the New Pledgor

 
 CAPITAL STOCK OR OTHER EQUITY INTERESTS

	 Issuer
  	 Number of
 Certificate
  	 Registered
 Owner  	 Number and
 Class of
 Shares
 or Other
 Equity
 Interests 	 Percentage
 of
 Shares
 or Other
 Equity
 Interests
  
	   	   	   	   	  
 

 
 DEBT SECURITIES
  
 17 of 18

	  
 Issuer 	 Principal
 Amount   	 Date of Note 	  
 Maturity Date
 

 18 of 18Italian Supplement dated March 3, 2003

  Exhibit 10-aaa(3)
 
 ITALIAN SUPPLEMENT TO THE PLEDGE
AGREEMENT 
 RELATING TO THE INVESTOR REVOLVING CREDIT AGREEMENT 
 This ITALIAN SUPPLEMENT, dated as of
March 3, 2003 (as amended, supplemented or otherwise modified from time to time, the "Italian Supplement") to the PLEDGE AGREEMENT relating to the Investor Revolving Credit Agreement (as defined below) dated as of
March 3, 2003 (as amended, supplemented or otherwise modified from time to time, the "Pledge Agreement"), is made among MEMC ELECTRONIC MATERIALS, INC., a Delaware corporation (the "Borrower" or the "Pledgor"), CITICORP USA,
INC., as collateral agent (in such capacity, the "Collateral Agent") and custodian, and CITICORP USA, INC., as attorney-in-fact acting in the name and on behalf of the Secured Parties (as defined in the Investor Revolving Credit Agreement
that is defined below). The Pledge Agreement, as supplemented by this Italian Supplement, shall be referred to herein as this "Agreement". Unless otherwise defined or specified herein or amended hereby, capitalized terms used herein which are
defined in the Pledge Agreement or the Investor Revolving Credit Agreement are used herein as therein defined.
 WITNESSETH
 WHEREAS, pursuant to that certain pledge agreement dated December 21, 2001 (as amended from time to time, the "Bank Revolver Pledge Agreement"), the pledgors thereunder agreed to pledge and grant to the
Collateral Agent a security interest in the Collateral (as therein defined) for the ratable benefit of the secured parties under a revolving credit agreement, dated December 21, 2001, among the Borrower, the lenders from time to time party thereto,
and Citicorp USA, Inc., as collateral agent and administrative agent (as amended, supplemented or otherwise modified from time to time, the "Bank Revolving Credit Agreement"), pursuant to which the lenders party thereto agreed to provide the
Borrower with a revolving credit facility in an initial aggregate principal amount not to exceed U.S.$150,000,000;
 WHEREAS, pursuant to that certain amended and
restated pledge agreement dated December 21, 2001 (as amended from time to time, the "Reimbursement Pledge Agreement"), the pledgors thereunder agreed to pledge and grant to the Collateral Agent a security interest in the Collateral (as
therein defined) for the ratable benefit of the secured parties under a reimbursement agreement, dated December 21, 2001, among the Borrower, the Fund Guarantors (as therein defined) and the Collateral Agent (as amended, supplemented or otherwise
modified from time to time, the "Reimbursement Agreement"), pursuant to which the Borrower agreed to reimburse the Fund Guarantors for any and all payments made by the Fund Guarantors under the Guaranty (as therein defined);
 WHEREAS, on March 3, 2003 the Borrower and Citicorp USA, Inc., acting both as collateral agent and as attorney-in-fact for each of the secured parties (under the Bank Revolver
Pledge Agreement and the Reimbursement Pledge Agreement, respectively) entered into, by way of exchange of correspondence, (i) that certain Italian supplement to the Bank Revolver Pledge Agreement (as amended from time to time, the "Bank Revolver
Italian Supplement"), and (ii) that certain Italian supplement to the Reimbursement Pledge Agreement (as amended from time to time, the "Reimbursement Italian Supplement") so as to perfect, including under Italian law, a first degree
security interest over 65% of the issued and outstanding voting stock of MEMC Electronic Materials S.p.A. in favor of the respective secured parties thereunder;
 WHEREAS, the Borrower has entered into that certain revolving credit agreement, dated as of December 5, 2002, with the lenders party thereto (the "Lenders") and Citicorp USA, Inc., as administrative agent
and collateral agent (as amended, supplemented or otherwise modified from time to time, the "Investor Revolving Credit Agreement"), pursuant to which the Lenders agreed to provide the 
 1 of 31

  Borrower with a revolving credit facility in an aggregate principal amount not to exceed U.S.$35,000,000;
 WHEREAS, to induce the Lenders to enter into the Investor Revolving Credit Agreement, the Pledgors agreed to secure and guarantee, among other things, all the Borrower's obligations under the Investor
Revolving Credit Agreement for the ratable benefit of the Secured Parties, on a senior subordinated basis as set forth in Article X of the Investor Revolving Credit Agreement and Article II of the related Guarantee Agreement;
 WHEREAS, pursuant to the Investor Revolving Credit Agreement, the Lenders have agreed to make Loans to the Borrower upon the terms and subject to the conditions specified therein
and in particular subject to the execution and delivery by the Borrower of the Pledge Agreement to secure (a) the due and punctual payment of (i) the principal and premium, if any, and interest (including interest accruing during the pendency of any
bankruptcy, of insolvency, receivership or other similar proceeding, regardless of whether allowed or allowable in such proceeding) on the Loans, when and as due, whether at maturity, by acceleration, upon one or more dates set for prepayment or
otherwise and (ii) all other monetary obligations, including fees, costs, expenses and indemnities, whether primary, secondary, direct, contingent, fixed or otherwise (including monetary obligations incurred during the pendency of any bankruptcy,
insolvency, receivership or other similar proceeding, regardless of whether allowed or allowable in such proceeding), of the Loan Parties to the Secured Parties under the Investor Revolving Credit Agreement and the other Loan Documents, (b) the due
and punctual performance of all covenants, agreements, obligations and liabilities of the Loan Parties under or pursuant to the Investor Revolving Credit Agreement and the other Loan Documents, (c) unless otherwise agreed to in writing by the
applicable Lender party thereto, the due and punctual payment and performance of all obligations of the Borrower or any other Loan Party, monetary or otherwise, under each Hedging Agreement entered into with a counterparty that was a Lender (or an
Affiliate of a Lender) at the time such Hedging Agreement was entered into and (d) the due and punctual payment and performance of all obligations in respect of overdrafts and related liabilities owed to the Administrative Agent or any of its
Affiliates and arising from treasury, depositary and cash management services in connection with any automated clearing house transfers of funds (all the monetary and other obligations referred to in the preceding clauses (a) through (d) being
referred to collectively as the "Investor Revolver Obligations");
 WHEREAS, the Borrower, the Subsidiary Pledgors, the Secured Parties and the Collateral Agent
have executed and delivered the Pledge Agreement to grant a security interest, on a senior subordinated basis, for the payment and performance in full of the Investor Revolver Obligations; 
 WHEREAS, the Borrower, the Secured Parties and the Collateral Agent desire to supplement and integrate the Pledge Agreement so as to perfect, including under Italian law, the security interest created for the
ratable benefit of the Secured Parties over that portion of the Collateral owned by the Borrower consisting of No. 42,250,000 ordinary shares of MEMC Electronic Materials S.p.A. (the "Italian Issuer") equal to 65% of the issued and
outstanding voting stock of the Italian Issuer (the "Shares") and represented by certificate No. 64 of the Italian Issuer (the "Certificate"); and
 WHEREAS, the parties hereto agree that this Agreement will only concern, relate, deal exclusively with the security interest created in accordance with New York law under the Pledge Agreement with respect to that
portion of the Collateral consisting of the Shares which are represented by the Certificate.
 NOW, THEREFORE, the Pledgor, the Secured Parties and Citicorp USA, Inc.,
as the Collateral Agent and acting also in the name and on behalf of each of the Secured Parties (and each of their respective successors or assigns), hereby agree to supplement and integrate the Pledge Agreement, which will continue to be in full
force and effect among the parties hereto and thereto, as follows.
 2 of 31

  On or after the date on which this Italian Supplement shall become effective, solely for purposes under or relating to this Italian Supplement,
each reference in this Italian Supplement or the Pledge Agreement to "this Pledge Agreement", "Agreement", "hereunder", "hereof", "herein" or words of like import shall mean and be a reference to this Agreement (as defined in the Preamble
hereof).
 On or after the date on which this Italian Supplement shall become effective, solely for purposes under or relating to this Italian Supplement, each reference
in this Agreement to "Pledgors", "such Pledgor", "each Pledgor" or words of like import implying a reference to the presence, under the Pledge Agreement, of Pledgors in addition to the Borrower, shall mean and interpreted to be a reference only to
the Borrower as the sole pledgor of the Shares, and references to "Collateral" or words of like import shall mean and interpreted to be a reference only to the Italian Collateral as defined under this Agreement.
 The provisions of this Agreement specifying that the Collateral Agent acts on behalf and/or pursuant to the instructions of the Secured Parties shall mean that the Collateral Agent will act on behalf
and/or pursuant to the instructions of the Required Lenders as defined in the Investor Revolving Credit Agreement.
 SECTION 1. Pledge. For any and all
purposes solely under this Italian Supplement, Section 1 of the Pledge Agreement shall be deleted in its entirety and replaced with the following text:
 "SECTION 1.
Pledge. As security for the payment and performance, as the case may be, in full of the Investor Revolver Obligations, the Pledgor has pledged and granted to the Collateral Agent, its successors and assigns, and has granted to the Collateral
Agent, its successors and assigns, for the ratable benefit of Secured Parties, among other things, a security interest (the "Pledge") in all of the Pledgor's following rights and benefits (the "Pledged Rights"): (a) the Shares, namely
No. 42,250,000 ordinary shares of the Italian Issuer equal to 65% of the voting stock of such company (the "Pledged Interest" or, alternatively, the "Pledged Securities"; both expressions are deemed to include the New Shares, as
defined in (c) below), par value Euro 0.48, represented by the Certificate; (b) subject to Section 5 hereof, all payments of principal or interest, dividends, cash, instruments and other property from time to time received, receivable or otherwise
distributed, in respect of, in exchange for or upon the conversion of the Pledged Securities; (c) shares or stock of the Italian Issuer issued, accruing or subscribed to after the date hereof or otherwise acquired by the Borrower, including by means
affecting the capital stock of the Italian Issuer, in relation to the Shares ("New Shares"); provided that the percentage of voting share capital represented by the Shares pledged herein (including New Shares and whether referred to as
"Pledged Interest", "Pledged Securities" or "Collateral") shall never exceed 65% of the issued and outstanding voting stock of the Italian Issuer; (d) subject to Section 5 hereof, all rights and privileges of the Pledgor with respect to the Shares
and New Shares; and (e) all the proceeds of any of the foregoing (the items referred to in clauses (a) through (e) being collectively referred to as the "Italian Collateral"). 
 Without prejudice to the above definition, the Investor Revolver Obligations shall include, but not be limited to, (i) the total maximum amount, as principal, of the Loans, equal to U.S.$ 35,000,000; (ii) all the
interest due under the Investor Revolving Credit Agreement; (iii) all the fees, charges and all reasonable expenses (including legal and fiscal expenses) payable under the Investor Revolver Credit Agreement incurred by, and any other sum paid by the
Secured Parties or the Collateral Agent in relation to the enforcement of the Pledge or the right arising from this Agreement; (iv) the payment of any and all sums due or to become due by the Pledgor to the Secured Parties on account of the

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  obligation to redeem the amounts received as unjustified enrichment or for similar cause as a consequence of nullity, voidness or invalidity of
the Loan Documents; and (v) the payment of any sum due or to become due, at any time and from time to time, by the Pledgor to the Secured Parties and the Collateral Agent under this Agreement.
 To the extent that they have not previously been pledged in favor of the Secured Parties according to this Agreement or otherwise (and without exceeding the 65% limitation referred to in the first paragraph of
this Section), the Borrower irrevocably agrees and undertakes to pledge in favor of the Secured Parties (including their successors and assignees as well as additional Loan Parties pursuant to the Loan Documents) the New Shares, provided that
the foregoing shall not be a novation of this Agreement and/or the Pledge. It is understood that the same Pledged Rights and provisions as set forth in this Agreement shall extend to such New Shares, including the Pledgor's and the Secured Parties'
authorization to the Collateral Agent to take any action it deems necessary in good faith in the event it encounters a conflict of interest, or in a situation described under Article 1395 of the Italian Civil Code ("contratto con se
stesso").
 Any security interest granted hereunder shall be subject to the prior lien and security interest granted under the Bank Loan Documentation in favor of
the Secured Parties (as therein defined, hereinafter the "Senior Secured Parties") as security for the payment or performance, as the case may be, in full of the Bank Revolver Obligations (the "Senior Security Interest").
 TO HAVE AND TO HOLD the Italian Collateral, together with all right, title, interest, powers, privileges and preferences pertaining or incidental thereto, unto the Collateral
Agent, its successors and assigns, on behalf of and for the ratable benefit of the Secured Parties, forever; subject, however, to the terms, covenants and conditions hereinafter set forth."
 SECTION 2. Delivery of the Collateral
 For any and all purposes solely under this Italian Supplement, Section 2 of
the Pledge Agreement shall be deleted in its entirety and replaced with the following text:
 "SECTION 2. Registration of the Pledge and Custody of the
Italian Collateral. 
 Immediately after the execution and delivery of this Agreement, the Pledgor shall procure that:
  (a) the security interest created under this Agreement be annotated on the Certificate by a Director of the Italian Issuer, substantially in the form indicated in Exhibit A hereto. In this regard, the
parties hereto acknowledge that the Certificate is presently in the possession and in the custody, or under the sole control, of the Collateral Agent, which will make it available to a Director of the Italian Issuer so as to permit the text of such
annotation to be inscribed on the back of the Certificate;
  (b) the security interest created under this Agreement be annotated in the shareholders' book of the
Italian Issuer (the "Shareholders' Book") substantially in the form indicated in Exhibit B hereto; and
  (c) a certified copy of the pages of the
Shareholders' Book bearing the annotation referred to in (b) above be delivered to the Collateral Agent.
 The Pledgor and the Secured Parties hereby expressly agree to
appoint the Collateral Agent, who accepts, as third party custodian in respect of the Certificate and, generally, the Italian Collateral in accordance with Article 2786, second paragraph, of the Italian Civil Code. The Pledgor and the Secured

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  Parties expressly authorize the Collateral Agent to take any action it deems necessary in good faith in the event it encounters a conflict of
interest, or in a situation described under Article 1395 of the Italian Civil Code ("contratto con se stesso").
 The parties hereto expressly acknowledge and
agree that (i) the Collateral Agent - also in its capacity as third party custodian under Article 2786, second paragraph, of the Italian Civil Code - has received and holds the Certificate pursuant to (x) the Reimbursement Pledge Agreement and the
related Reimbursement Italian Supplement, and (y) the Bank Revolver Pledge Agreement and the related Bank Revolver Italian Supplement; (ii) during the procurement of the procedure set forth in (a) and (b) above, the Collateral Agent shall maintain
exclusive, continuous and uninterrupted possession of the Certificate and the Pledged Rights in general; (iii) immediately after the completion of the procedure set forth in (a), (b) and (c) above, with the consent of all the parties to the
agreements under (i)(x) and (i)(y) above, the Collateral Agent shall hold the Certificate and the Pledged Rights, under its custody pursuant to this Agreement also in the name and on behalf of the Secured Parties. 
 The Pledgor and each of the Secured Parties, for the purpose of this Agreement, irrevocably grant the Collateral Agent the power to annotate, endorse, inscript or request the
annotation, endorsement or inscription on their behalf of the Certificate and the certificates representing the New Shares, if any. 
 In addition to the foregoing, and
in accordance with Section 1, paragraph 1, subsection (c) above, the Pledgor shall procure that the following registration requirements are put in place with regard to New Shares: 

	 	a.	the Pledgor, upon issuance of the share certificates representing New Shares shall cause the Italian Issuer to annotate the Pledge on such share certificates, with the
cooperation of the Collateral Agent, substantially in the form in Exhibit C hereto;
	 		
	 	b.	immediately after the completion of the annotation referred to in paragraph a. above, the Pledgor shall cause the Italian Issuer to return to the Collateral Agent the
certificates representing New Shares, which will be kept in the custody of the Collateral Agent in accordance with Article 2786, second paragraph of the Italian Civil Code and in accordance with the provisions of this Agreement outside of Italy;

	 		
	 	c.	immediately after the completion of the annotation referred to in a. above, the Pledgor shall cause the Italian Issuer to annotate the Pledge in the Shareholders' Book,
substantially in the form indicated in Exhibit D hereto; and 
	 		
	 	d.	a certified copy of the pages of the Shareholders' Book bearing the annotation referred to in c. above be delivered to the Collateral Agent. 

In addition to the above, if so requested by the Collateral Agent by means of a written notice substantially in the form indicated in Exhibit G hereto (the "New Secured
Party Notice"), the Pledgor shall procure that the Pledge be extended to the benefit of any new secured party in its capacity as a new party to the Investor Revolving Credit Agreement, the Hedging Agreements or any other Loan Document (the
"New Secured Party"). It is understood that the security interest granted in favor of the New Secured Party shall be subject to the existing Senior Security Interest granted under the Bank Loan Documentation, and will be governed by the
provisions of this Agreement.
 Immediately after the receipt of the New Secured Party Notice:
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	 	a.	The Collateral Agent, in such capacity and in the name and on behalf of the Pledgor and the Secured Parties, shall cause the Italian Issuer to annotate the extension of
the Pledge to the benefit of the New Secured Party on the Certificate (and on the certificates representing New Shares, if any), which is held by the Collateral Agent in such capacity and in its capacity as third party custodian under Article 2786,
second paragraph, of the Italian Civil Code, substantially in the form indicated in Exhibit E hereto;
	 		
	 	b.	immediately after the completion of the annotation referred to in paragraph a. above, the Collateral Agent, in such capacity and in the name and on behalf of the
Pledgor and the Secured Parties, shall cause the Italian Issuer to annotate the extension of the Pledge to the benefit of the New Secured Party in the Shareholders' Book, substantially in the form indicated in Exhibit F hereto;
and
	 		
	 	c.	immediately after the completion of the annotation referred to in b. above, the Collateral Agent, also on behalf of the Pledgor, shall cause the Italian Issuer to
deliver to the Collateral Agent a certified copy of the page(s) of the Shareholders' Book bearing the above mentioned annotation." 
	 		
	 	3.	Representations, Warranties and Covenant. 

 
 For any
and all purposes solely under this Italian Supplement, Section 3 of the Pledge Agreement shall be deleted in its entirety and replaced with the following text:
 "SECTION 3. Representations, Warranties and Covenants The Pledgor hereby represents, warrants and covenants, as to itself and with respect to the Italian Collateral pledged by it hereunder, to and with the
Collateral Agent that: 
 (a) the Pledged Interest represents 65% of the issued and outstanding voting shares of the Italian Issuer;
 (b) except for the Senior Security Interest, the lien and security interest granted under the Indenture Documentation as security for the payment or performance, as the case may be, of the Indenture
Obligations and the security interest granted hereunder, the Pledgor (i) is and will at all times continue to be the direct owner, beneficially and of record, of the Shares, (ii) holds the same free and clear of all Liens other than Liens permitted
pursuant to Section 6.02 of the Investor Revolving Credit Agreement, (iii) will make no assignment, pledge, hypothecation or transfer of, or create or permit to exist any security interest in or other Lien on, the Italian Collateral, other than
pursuant hereto, and (iv) subject to Section 5, will cause any and all Italian Collateral, whether for value paid by the Pledgor or otherwise, to be forthwith deposited with the Collateral Agent and pledged or assigned hereunder;
 (c) the Pledgor (i) has the power and authority to pledge the Italian Collateral in the manner done or contemplated hereby and (ii) will defend its title or interest
thereto or therein against any and all Liens (other than Liens created by the Loan Documents, the Bank Loan Documentation and the Indenture Documentation) however arising, of all Persons whomsoever;
 (d) no consent of any other Person (including stockholders or creditors of the Pledgor) and no consent or approval of any Governmental Authority or any securities exchange (other than consents already obtained by
the Borrower under the Bank Loan Documentation, the Indenture Documentation and the Italian Guaranty) was or is necessary for the validity of the Pledge effected hereby;
 (e) this Agreement shall, upon the completion of the annotation of the Certificate by a Director of the 
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  Italian Issuer, as well as upon proper annotation of the Pledge in the Shareholders' Book, constitute in favor of the Secured Parties a valid and
perfected lien upon and security interest in such Pledged Securities for the punctual payment or performance of the Investor Revolver Obligations (subject only to the liens and security interest that comprise the Senior Security Interest). The
Secured Parties shall accept, a-cknowledge and permit the creation by the Pledgor of the other liens and security interests granted over the Certificate (and other share certificates representing New Shares, if any) under the Indenture
Documentation;
 (f) the Pledge effected hereby is effective to vest in the Secured Parties the rights of the Collateral Agent in the Italian Collateral as set forth
herein;
 (g) the Pledged Interest has been duly authorized and validly issued and is fully paid and nonassessable;
 (h) all information set forth herein relating to the Pledged Interest is accurate and complete in all material respects as of the date hereof; and
 (i) the Pledge pursuant to this Agreement does not violate Regulation T, U or X of the Federal Reserve Board or any successor thereto as of the date hereof."
 SECTION 4. Registration in Nominee Name; Denominations
 For any and all purposes solely under this Italian Supplement,
Section 4 of the Pledge Agreement shall be deleted in its entirety. 
 SECTION 5. Voting Rights; Dividends and Interest, etc. 
 For any and all purposes solely under this Italian Supplement, Section 5 of the Pledge Agreement shall be deleted in its entirety and replaced with the following
text:
 "SECTION 5. Voting Rights; Dividends and Interest, etc. (a) Unless and until an Event of Default shall have occurred and be continuing:

	 	(i) The Pledgor shall be entitled to exercise any and all voting and/or other consensual rights and powers inuring to an owner of Pledged Securities or any part thereof for any
purpose consistent with the terms of this Agreement, the Investor Revolving Credit Agreement and the other Loan Documents; provided, however, that the Pledgor will not be entitled to exercise any such right if the result thereof could
materially and adversely affect the rights inuring to a holder of the Pledged Securities or the rights and remedies of any of the Secured Parties under this Agreement or the Investor Revolving Credit Agreement or any other Loan Document or the
ability of the Secured Parties to exercise the same.
	 	 	 
	 	(ii) The Collateral Agent shall execute and deliver to the Pledgor, or cause to be executed and delivered to the Pledgor, all such proxies, powers of attorney and other instruments
as the Pledgor may reasonably request for the purpose of enabling it to exercise the voting and/or consensual rights and powers it is entitled to exercise pursuant to subparagraph (i) above and to receive the cash dividends it is entitled to
receive pursuant to subparagraph (iii) below.
	 	 	 
	 	(iii) The Pledgor shall be entitled to receive and retain any and all cash dividends, interest and principal paid on the Pledged Securities to the extent and only to the extent that
such cash dividends, interest and principal are permitted by, and otherwise paid in accordance with, the terms and conditions of the Investor Revolving Credit Agreement, the other Loan 

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	 	Documents and applicable law. All noncash dividends, interest and principal, and all dividends, interest and principal paid or payable in cash or otherwise in connection with a
partial or total liquidation or dissolution, return of capital, capital surplus or paid-in surplus, and all other distributions (other than distributions referred to in the preceding sentence) made on or in respect of the Pledged Securities, whether
paid or payable in cash or otherwise, whether resulting from a subdivision, combination or reclassification of the outstanding capital stock of the Italian Issuer or received in exchange for Pledged Securities or any part thereof, or in redemption
thereof, or as a result of any merger, consolidation, acquisition or other exchange of assets to which the Italian Issuer may be a party or otherwise, shall be and become part of the Italian Collateral, and, if received by the Pledgor, shall not be
commingled by it with any of its other funds or property but shall be held separate and apart therefrom, shall be held in trust for the benefit of the Secured Parties and shall be forthwith delivered to the Collateral Agent in the same form as so
received (with any necessary endorsement).

 (b) Upon the occurrence and during the continuance of an Event of Default, all rights of the Pledgor to
dividends, interest or principal that the Pledgor is authorized to receive pursuant to paragraph (a)(iii) above shall cease, and all such rights shall thereupon become vested in the Secured Parties and, on their behalf, to the Collateral Agent
acting on their behalf as "rappresentante comune", pursuant to Article 2347 of the Italian Civil Code, it being understood that the Secured Parties and the Collateral Agent, as their "rappresentante comune", will have the sole and
exclusive right and authority to receive and retain such dividends, interest or principal, subject to the liens and security interest that comprise the Senior Security Interest and in accordance with Section 7 below. All dividends, interest or
principal received by the Pledgor contrary to the provisions of this Section 5 shall be held in trust for the benefit of the Secured Parties, shall be segregated from other property or funds of the Pledgor and shall be forthwith delivered to
the Collateral Agent, acting on behalf of the Secured Parties, upon demand in the same form as so received (with any necessary endorsement). Any and all money (including dividends, interest or principal) and other property paid over to or received
by the Collateral Agent pursuant to the provisions of this paragraph (b) shall be retained by the Collateral Agent on behalf of the Secured Parties in an account to be established by the Collateral Agent upon receipt of such money or other
property and shall be applied in accordance with the provisions of Section 7 below. After all Events of Default have been cured or waived, the Collateral Agent acting on behalf of the Secured Parties shall promptly repay to each Pledgor all
cash dividends, interest or principal (without interest), that such Pledgor would otherwise be permitted to retain pursuant to the terms of paragraph (a)(iii) above and which remain in such account.
 (c) Upon the occurrence and during the continuance of an Event of Default, all rights of the Pledgor to exercise the voting and consensual rights and powers it is entitled to exercise pursuant to
paragraph (a)(i) of this Section 5, and the obligations of the Collateral Agent under paragraph (a)(ii) of this Section 5, shall cease, and all such rights shall thereupon become vested in the Secured Parties and, on their
behalf, to the Collateral Agent acting on their behalf as "rappresentante comune", pursuant to Article 2347 of the Italian Civil Code provided that, unless otherwise directed by the Required Lenders, the Collateral Agent shall have the
right from time to time following and during the continuance of an Event of Default to permit the Pledgor to exercise such rights. After all Events of Default have been cured or waived, the Pledgor will have the right to exercise the voting and
consensual rights and powers that it would otherwise be entitled to exercise pursuant to the terms of paragraph (a)(i) above."
 SECTION 6. Remedies upon Default.

 For any and all purposes solely under this Italian Supplement, after the end of Section 6 of the Pledge Agreement the following text shall be
inserted:
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  "Without prejudice to the provisions set forth above, should the Collateral Agent - acting on its own behalf and also on behalf of the Secured
Parties and pursuant to their instructions - decide to enforce the Pledge in Italy, it shall sell the Pledged Rights and carry out the enforcement procedure pursuant to Articles 2796, 2797 and 2798 of the Italian Civil Code."
 SECTION 7. Application of Proceeds of Sale. 
 For any and all purposes solely under this
Italian Supplement, Section 7 of the Pledge Agreement shall be deleted in its entirety and replaced with the following text:
 "SECTION 7. Application of Proceeds
of Sale. 
 The Collateral Agent shall apply the proceeds of any collection or sale of the Italian Collateral, as well as any Italian Collateral consisting of cash,
as follows:
  FIRST, to the payment in full of any Bank Revolver Obligations outstanding, to the extent that the Bank Loan Documentation is in force;
 SECOND, to the payment of all costs and reasonable expenses incurred by the Administrative Agent or the Collateral Agent (in its capacity as such hereunder or under any other Loan Document) in connection
with such collection or sale or otherwise in connection with this Agreement or any of the Investor Revolver Obligations, including all court costs and the reasonable fees and expenses of its agents and legal counsel, the repayment of all advances
made by the Collateral Agent hereunder or under any other Loan Document on behalf of the Pledgor and any other costs or expenses incurred in connection with the exercise of any right or remedy hereunder or under any other Loan Document;

THIRD, to the payment in full of the Investor Revolver Obligations (the amounts so applied to be distributed among the Secured Parties pro rata in accordance with the amounts of the Investor
Revolver Obligations owed to them on the date of such distribution); 
 FOURTH, to the payment in full of the Indenture Obligations; and
 FIFTH, to the Pledgor, its successors or assigns, or as a court of competent jurisdiction may otherwise direct.
 
 The
Collateral Agent shall have absolute discretion as to the time of application of any such proceeds, moneys or balances in accordance with this Agreement. Upon any sale of the Italian Collateral by the Collateral Agent (including pursuant to any
authority to sell granted by statute or under a judicial proceeding), the receipt of the purchase money by the Collateral Agent in the name and on behalf of the Secured Parties or of the officer making the sale shall be a sufficient discharge to the
purchaser or purchasers of the Italian Collateral so sold and such purchaser or purchasers shall have no obligation with respect to the application of any part of the purchase money paid over to the Collateral Agent or such officer or be liable in
any way for the misapplication thereof."
 SECTION 8. Reimbursement of Collateral Agent. 
 For any and all purposes solely under this Italian Supplement, Section 8(a)(ii) and 8(a)(iii) of the Pledge Agreement shall be deleted in their entirety and replaced with the following text:
 "(a) ... (ii) the custody or preservation of, or the sale of, collection from, or other realization on behalf of the Secured Parties upon any of the Italian Collateral,
(iii) the exercise or enforcement by the Collateral
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   Agent of any of the rights of the Collateral Agent and/or the Secured Parties hereunder (including the Italian registration tax due in order to
enforce any Italian Court's or any agency's ruling or decision) or (iv) the...". 
 SECTION 9. Collateral Agent Appointed Attorney-in-fact.
 For any and all purposes solely under this Italian Supplement, Section 9 of the Pledge Agreement shall be deleted in its entirety and replaced with the following
text:
 "SECTION 9. Collateral Agent Appointed Attorney-in-fact.
 The
Pledgor hereby appoints the Collateral Agent as its the attorney-in-fact for the purpose of carrying out the provisions of this Agreement and taking any action and executing any instrument that the Collateral Agent may deem necessary or advisable to
accomplish the purposes hereof, which appointment is irrevocable and coupled with an interest. Without limiting the generality of the foregoing, the Collateral Agent shall have the right, upon the occurrence and during the continuance of an Event of
Default, with full power of substitution either in the Collateral Agent's name or in the name of the Pledgor, to ask for, demand, sue for, collect, receive and give acquittance for any and all moneys due or to become due under and by virtue of the
Italian Collateral, to endorse checks, drafts, orders and other instruments for the payment of money payable to the Pledgor representing any interest or dividend or other distribution payable in respect of the Italian Collateral or any part thereof
or on account thereof and to give full discharge for the same, to settle, compromise, prosecute or defend any action, claim or proceeding with respect thereto, and to sell, assign, endorse, pledge, transfer and to make any agreement respecting, or
otherwise deal with, the same; provided, however, that nothing herein contained shall be construed as requiring or obligating the Collateral Agent to make any commitment or to make any inquiry as to the nature or sufficiency of any
payment received by the Collateral Agent, or to present or file any claim or notice, or to take any action with respect to the Italian Collateral or any part thereof or the moneys due or to become due in respect thereof or any property covered
thereby. The Collateral Agent and the other Secured Parties shall be accountable only for amounts actually received as a result of the exercise of the powers granted to them herein, and neither they nor their officers, directors, employees or agents
shall be responsible to the Pledgor for any act or failure to act hereunder, except for their own gross negligence or willful misconduct. Notwithstanding anything to the contrary under this Agreement, the Collateral Agent shall have, hold and keep
in custody the Italian Collateral exclusively for the ratable benefit of the Secured Parties and may not be deemed, under any circumstances, as holding, possessing or keeping in custody the Italian Collateral on behalf of the Pledgor."
 SECTION 13. Security Interest Absolute. 
 For any and all purposes solely under this
Italian Supplement, at the beginning of the first paragraph in Section 13, after the words " All rights of the Collateral Agent", the following words will be added: "and of the Secured Parties".
 SECTION 14. Termination or Release.
 For any and all purposes solely under this Italian Supplement, Section 14 (c) of the
Pledge Agreement shall be deleted in its entirety and replaced with the following text: 
 "(c) In connection with any termination or release pursuant to
paragraph (a) or (b) or Section 17 hereof, the Collateral Agent, acting on behalf of and pursuant to the instructions of the Secured Parties, shall endorse or annotate, execute and deliver to the Pledgor, at the Pledgor's expense, all
documents that are necessary under applicable laws in order to effect the termination of the Pledged Rights (including the 
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  Certificate and other share certificates representing New Shares, if any) as well as any other document that such Pledgor shall reasonably request
to evidence such termination or release, and do all such acts or things as may be necessary or desirable or reasonably requested by the Pledgor to effect, in accordance with applicable laws, the reversion of the Pledged Rights to it. Any execution
and delivery of documents pursuant to this Section 14 shall be without recourse to or warranty by the Collateral Agent." 
  17. Binding Effect; Several Agreement; Assignment. 
 
 For any and all purposes solely under this Italian
Supplement, Section 17 of the Pledge Agreement shall be deleted in its entirety and replaced with the following text:
 "SECTION 17. Binding Effect; Several
Agreement; Assignments.
 Whenever in this Agreement any of the parties hereto is referred to, such reference shall be deemed to include the successors and assigns
of such party; and all covenants, promises and agreements by or on behalf of the Pledgor that are contained in this Agreement shall bind and inure to the benefit of its successors and assigns. This Italian Supplement shall become effective once that
the Pledgor shall have received from the Collateral Agent an acceptance (executed cover letter from the Collateral Agent and an initialed copy of this Italian Supplement) executed on behalf of the Collateral Agent and each of the Secured Parties as
acceptance of the Pledgor's proposal (executed cover letter from the Pledgor and an initialed copy of this Italian Supplement) to the Collateral Agent and the Secured Parties to enter into this Italian Supplement. Thereafter, this Italian Supplement
shall be binding upon the Pledgor, the Collateral Agent and the Secured Parties and their respective successors and assigns, and shall inure to the benefit of the Pledgor, the Collateral Agent and the Secured Parties, their respective successors and
assigns, except that the Pledgor shall not have the right to assign its rights hereunder or any interest herein or in the Italian Collateral (and any such attempted assignment shall be void), except as expressly contemplated by this Agreement or the
other Loan Documents. The executed proposal or acceptance referred to above received by facsimile transmission shall be effective as delivery of a manually executed acceptance or proposal.
 The Secured Parties shall have the right to transfer or otherwise assign the rights and obligations arising out of this Agreement to the benefit of the assignee, subject to the procedure set forth below and the
relevant provisions of the Investor Revolving Credit Agreement and the Loan Documents, it being understood that such rights and obligations shall be transferred or assigned only in conjunction with the transfer or assignment of the rights granted
pursuant to, and the obligations arising out from the Investor Revolving Credit Agreement and the Loan Documents. The Pledgor hereby expressly and irrevocably consents to such transfer or assignment by any of the Secured Parties. It is understood
that the extension of the Pledge in favor of the assignee will have the same rank (and shall be subject to the same Liens) as the Pledge in favor of the Secured Party effecting the transfer or assignment. Upon any assignment by a Secured Party of
its interest under an Assignment and Acceptance pursuant to the Investor Revolving Credit Agreement, the Collateral Agent, acting in the name and on behalf of the Secured Parties, shall ensure that the annotations referred to in Section 2 above are
duly made and that the relevant formalities are complied with in accordance with mandatory requirements of Italian law.
 In the event of a transfer or an assignment by
any of the Secured Parties of its rights and obligations arising out of this Agreement:
 (i) the Collateral Agent, in such capacity and in the name and on behalf of the
Pledgor, shall cause the Italian Issuer to annotate the transfer of the Pledge on the Certificate (and on the certificates representing 
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  New Shares, if any), in accordance with Italian law;
 (ii)
immediately after the completion of the annotation referred to in (i) above, the Collateral Agent, in such capacity and in the name and on behalf of the Pledgor, shall cause the Italian Issuer to annotate the Pledge in the Shareholders' Book, in
accordance with Italian law;
 (iii) immediately after the completion of the annotation referred to in (ii), the Collateral Agent, in such capacity and in the name and
on behalf of the Pledgor, shall cause the Italian Issuer to deliver to the Collateral Agent a certified copy of the pages of the Shareholders' Book evidencing the above mentioned annotation; and
 (iv) the Collateral Agent, after completion of the procedure set forth above, shall continue to act as a third party custodian of the Shares (and of New Shares, if any) also to the benefit of the successors or
assigns of such Secured Party."
 SECTION 18Survival of Agreement; Severability
 For any and all purposes solely under this Italian Supplement, Section 18 of the Pledge Agreement shall be deleted in its entirety and replaced with the following text:
 "SECTION 18Survival of Agreement; Severabilit
 (a)  All covenants, agreements, representations
and warranties made by the Pledgor herein and in the certificates or other instruments prepared or delivered in connection with or pursuant to this Agreement or any other Loan Document shall be considered to have been relied upon by the Collateral
Agent and the other Secured Parties and shall survive the making of the Loans by the Lenders regardless of any investigation made by the Secured Parties or on their behalf, and shall continue in full force and effect as long as any Investor Revolver
Obligation remains unpaid and as long as the Commitments have not been terminated.
 (b) In the event any of the provisions in this Agreement should be held invalid,
illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular provision
in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). In the event that in any jurisdiction the subordination provisions in this Italian Supplement should be held invalid, illegal
of unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not be affected in any manner or impaired thereby. The parties shall endeavor in good-faith negotiations to replace the
invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions."
 SECTION 20.Counterparts.
 For any and all purposes solely under this Italian Supplement, Section 20 of the Pledge
Agreement shall be deleted in its entirety.
 SECTION 25. Additional Pledgors.
 For any and all purposes solely under this Italian Supplement, Section 25 of the Pledge Agreement shall be deleted in its entirety, being not applicable.
 IN WITNESS WHEREOF, the parties hereto have duly executed this Italian Supplement as of the day 
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  and year first above written.

	   	 MEMC ELECTRONIC MATERIALS, INC. 
 By: /s/ James M. Stolz
 Name: James M. Stloze
 Title
Executive Vice President, Chief Financial Officer  
	 
 	 
 
	   	 By: /s/ Kenneth L. Young
 Name: Kenneth L. Young
 Title: Treasuer  
	   	  
	   	 CITICORP USA, INC., as Collateral Agent and custodian
 By: /s/ Allen Fishe
 Name: Allen
Fisher, attorney-in-fact
 Title: Director  
	   	  
	   	 For TPG WAFER PARTNERS LLC, as Secured Party
 By: /s/ Allen Fisher
 Name: Allen Fisher,
attorney-in-fact
 Title: Director  
	   	  
	   	 For TCW/CRESCENT MEZZANINE PARTNERS III, L.P., as Secured Party
   By: /s/ Allen Fisher
 Name: Allen Fisher, attorney-in-fact
 Title: Director  
	   	  
	   	 For TCW/CRESCENT MEZZANINE TRUST III, as Secured Party
   By: /s/ Allen Fisher
 Name: Allen Fisher, attorney-in-fact
 Title: Director  

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	  	 For TCW/CRESCENT MEZZANINE PARTNERS III NETHERLANDS, L.P., as Secured Party
   By: /s/ Allen Fisher
 Name: Allen Fisher, attorney-in-fact
 Title: Director  
	  	  
	  	 For GREEN EQUITY INVESTORS III, L.P., as Secured Party
   By: /s/ Allen Fisher
 Name: Allen Fisher, attorney-in-fact
 Title: Director  
	  	  
	  	 For GREEN EQUITY INVESTORS SIDE III, L.P., as Secured Party
   By: /s/ Allen Fisher
 Name: Allen Fisher, attorney-in-fact
 Title: Director  

    
 
EXHIBIT A
 Testo della annotazione del pegno da apporre sul Certificato da parte di un amministratore della MEMC Electronic Materials
S.p.A.
 Si prende e si dà atto che, ai sensi del contratto di pegno di secondo grado (come
modificato, in pari data, dall'accordo denominato Italian Supplement to the Investor Revolving Pledge Agreement e concluso negli Stati Uniti d'America, attraverso scambio di corrispondenza) del 3 marzo 2003 (il "Contratto di Pegno") tra MEMC
Electronic Materials, Inc., società di diritto statunitense, con sede legale c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America, in qualità di costituente il pegno,
e CITICORP USA, Inc., società di diritto statunitense, con sede legale in 2 Penns Way, Suite 200 New Castle, Delaware, Stati Uniti d'America, e agente in qualità di Collateral Agent (come definito nel Contratto di Pegno), sia in
nome proprio sia in nome e per conto dei Creditori Pignoratizi (come di seguito indicati e definiti nel Contratto di Pegno quali Secured Parties), MEMC Electronic Materials, Inc. ha costituito in pegno n. 42.250.000 azioni ordinarie della
MEMC Electronic Materials S.p.A. (la "Società") - già costituite in garanzia (e attualmente custodite da Citicorp USA, Inc.) in base ai contratti di pegno di primo grado denominati, ai sensi del Contratto di Pegno, (a) Reimbursement
Pledge Agreement, come modificato dal Reimbursement Italian Supplement del 3 marzo 2003 e (b) Bank Revolver Pledge Agreement, come modificato dal Bank Revolver Italian Supplement del 3 marzo 2003, e conclusi tra MEMC
Electronic Materials, Inc., in qualità di costituente il pegno, Citicorp USA, Inc., in qualità di collateral agent, sia in nome proprio sia in nome e per conto dei rispettivi creditori pignoratizi ivi indicati (di seguito,
collettivamente, i "Creditori Pignoratizi di Primo Grado") - rappresentate dal certificato azionario n. 64 (il "Certificato") e corrispondenti, nel complesso, al 65% del capitale sociale della Società, in favore di:
 14 of 31

  Citicorp USA, Inc. con sede in 2 Penns Way, Suite 200 New Castle, Delaware, Stati Uniti d'America; TPG Wafer Partners LLC c/o The Corporation
Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America; TCW/Crescent Mezzanine Partners III, L.P. con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America;
TCW/Crescent Mezzanine Trust III, statutory business trust, con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; TCW/Crescent Mezzanine Partners III Netherlands, L.P., con sede in 11100 Santa Monica
Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors III, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors Side III, L.P., con sede in
11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America (i "Creditori Pignoratizi")

 a garanzia dell'integrale adempimento delle obbligazioni denominate Investor Revolver Obligations (come definite nel Contratto di
Pegno), ivi incluse quelle derivanti dallo stesso Contratto di Pegno, dall' Investor Revolving Credit Agreement e dagli altri Loan Documents (come ivi definiti). Ai sensi del Contratto di Pegno, tuttavia, il diritto reale di garanzia
di cui alla presente annotazione è a tutti gli effetti subordinato rispetto ai diritti di pegno di grado anteriore costituiti sul Certificato a seguito dei contratti di cui alle precedenti lettere (a) e (b).
 I diritti di voto, i diritti amministrativi connessi e il diritto a percepire i dividendi inerenti alle azioni costituite in pegno e rappresentate dal Certificato sono regolati
dalla Sezione 5 del Contratto di Pegno.
 Si dà atto che, ai sensi del Contratto di Pegno, Citicorp USA, Inc., quale Collateral Agent, riceve il pegno di
cui alla presente annotazione e pertanto, oltre a continuare a custodire ininterrottamente il Certificato nell'interesse e per conto dei Creditori Pignoratizi di Primo Grado, viene ora a custodire il medesimo anche nell'interesse e per conto dei
Creditori Pignoratizi, inclusi i loro successori e aventi causa, nonché delle New Secured Parties (come definite nel Contratto di Pegno). 
 Si dà
altresì atto che, ai sensi del Contratto di Pegno, i Creditori Pignoratizi hanno dato mandato a Citicorp USA, Inc., quale Collateral Agent, a fare quanto necessario affinchè la Società annoti sul Certificato sia il
trasferimento del presente pegno di secondo grado a favore di ogni successore o avente causa dei Creditori Pignoratizi sia l'estensione del presente pegno di secondo grado a favore di nuovi soggetti che risultino creditori di MEMC Electronic
Materials, Inc. in base a quanto previsto nel Contratto di Pegno (ivi definiti New Secured Parties), in entrambi i casi, con pari grado e diritti rispetto alla garanzia reale costituita a favore dei Creditori Pignoratizi di cui alla presente
annotazione.

	 
 
 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 La costituzione in
garanzia di cui sopra è stata annotata sul libro soci in data odierna ai sensi del R.D. 29.3.1942 n. 239.

	 
 
 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 
 EXHIBIT
A
 15 of 31

  Text of the notation of the pledge to be inscribed on the Certificate by a Director of MEMC Electronic Materials S.p.A.
 Pursuant to the second degree deed of pledge (as amended on the same date by the Italian Supplement to the Investor Revolving Pledge Agreement executed in the United States
of America by way of exchange of correspondence) dated March 3, 2003 (the "Deed of Pledge"), by and between MEMC Electronic Materials, Inc., a company duly incorporated and existing under the laws of the United States of America, with registered
offices at c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, United States of America, as pledgor, and CITICORP USA, Inc., a company duly incorporated and existing under the laws of the United States
of America, with registered office in 2 Penns Way, Suite 200 New Castle, Delaware, acting in its capacity as Collateral Agent (as defined in the Pledge Agreement), in its own name and in the name and on behalf of the Secured Parties (as
specified hereinafter and defined in the Pledge Agreement as "Secured Parties"), MEMC Electronic Materials, Inc. pledged 42,250,000 ordinary shares of MEMC Electronic Materials S.p.A. (the "Company") - already pledged in favor of the secured parties
and currently held in custody by CITICORP USA, Inc., pursuant to the first degree pledge agreements defined under the Pledge Agreement: (a) Reimbursement Pledge Agreement, as supplemented by the Reimbursement Italian Supplement dated March 3, 2003
and (b) Bank Revolver Pledge Agreement, as supplemented by the Bank Revolver Italian Supplement dated March 3, 2003 and executed by and between MEMC Electronic Materials, Inc., as pledgor, Citicorp USA, Inc., as Collateral Agent acting
in its own name and in the name and on behalf of the respective secured parties named therein (hereinafter collectively, the "Senior Secured Parties") represented by share certificate no. 64 ( the "Certificate") and representing in total 65% of the
share capital of the Company, in favor of:
 Citicorp USA, Inc. with registered office at 2 Penns Way, Suite 200 New Castle, Delaware, U.S.A.; TPG Wafer Partners LLC c/o
The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, U.S.A.; TCW/Crescent Mezzanine Partners III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.;
TCW/Crescent Mezzanine Trust III, statutory business trust, with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; TCW/Crescent Mezzanine Partners III Netherlands, L.P., with registered office at 11100 Santa
Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; Green Equity Investors III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; Green Equity Investors Side III, L.P., with registered office
at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A. (the "Secured Parties") as security for the full payment and performance of the obligations entitled Investor Revolver Obligations (as defined in the Deed of Pledge), including
those derived from the same Deed of Pledge, from the Investor Revolving Credit Agreement and from the other Loan Documents (as therein defined). Pursuant to the Deed of Pledge, however, the security interest referred to in this notation is to all
effects subordinated to the senior security interests created on the Certificate pursuant to the pledge agreements defined above in (a) and (b).
 The voting rights, the
related administrative rights, and the right to receive dividends relating to the pledged shares represented by the Certificate are governed by Section 5 of the Deed of Pledge.
 It is acknowledged that according to the second degree Deed of Pledge, CITICORP USA, Inc, as Collateral Agent, hereby receives the pledge referred to in this notation, and thus, in addition to maintaining the
uninterrupted custody of the Certificate on behalf of and in the interest of the First Degree Secured Parties, it now starts to hold the Certificate in custody also in the interest and in the interest and on behalf of the Secured Parties, including
their successors and assignees, as well as for the New Secured Parties (as defined in the Deed of Pledge).
 16 of 31

  It is also acknowledged that, pursuant to the second degree Deed of Pledge, the Secured Parties have instructed CITICORP USA, Inc., as Collateral
Agent, to take all necessary steps to have the Company annotating on the Certificate both the transfer of this second degree pledge in favor of each successor or assignee of the Secured Parties, and the extension of this second degree pledge for the
benefit of any new party who may become a creditor of MEMC Electronic Materials, Inc., in accordance with the Deed of Pledge (defined therein as "New Secured Parties"), in either case pari passu and with the same rights attached to the
security interest hereby created in favor of the Secured Parties.

	 [Place, date and time]  	 ______________________
 A Director
  

 The above creation of a
security interest is inscribed in the shareholders' book on today's date pursuant to Royal Degree 29.3.1942 No. 239.

	 [Place, date and time]  	 ______________________
 A Director
  

 Director
 EXHIBIT B
 Testo dell'annotazione del pegno da apporre sul libro soci della 

MEMC Electronic Materials S.p.A.
 Si prende e si dà atto che, ai sensi del contratto di pegno di secondo grado (come modificato, in pari data, dall'accordo denominato Italian Supplement to the Investor Revolving Pledge Agreement
concluso negli Stati Uniti d'America, attraverso scambio di corrispondenza) del 3 marzo 2003 (il "Contratto di Pegno") tra il socio unico MEMC Electronic Materials, Inc., società di diritto statunitense, con sede legale c/o The Corporation
Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America, in qualità di costituente il pegno, e CITICORP USA, Inc., società di diritto statunitense, con sede legale a 2 Penns Way, Suite 200
New Castle, Delaware, Stati Uniti d'America, e agente in qualità di Collateral Agent (come definito nel Contratto di Pegno), sia in nome proprio sia in nome e per conto dei Creditori Pignoratizi (come di seguito indicati e definiti nel
Contratto di Pegno quali Secured Parties), MEMC Electronic Materials, Inc. ha costituito in pegno n. 42.250.000 azioni ordinarie della Società - già costituite in garanzia (e attualmente custodite da Citicorp USA, Inc. in base
ai contratti di pegno di primo grado denominati, ai sensi del Contratto di Pegno, (a) Reimbursement Pledge Agreement, come modificato dal Reimbursement Italian Supplement del 3 marzo 2003 e (b) Bank Revolver Pledge Agreement,
come modificato dal Bank Revolver Italian Supplement del 3 marzo 2003, e conclusi tra MEMC Electronic Materials, Inc., in qualità di costituente il pegno, Citicorp USA, Inc., in qualità di collateral agent, sia in nome
proprio sia in nome e per conto dei rispettivi creditori pignoratizi ivi indicati (di seguito, collettivamente, i "Creditori Pignoratizi di Primo Grado") - rappresentate dal certificato azionario n. 64 (il "Certificato") e corrispondenti, nel
complesso, al 65% del capitale sociale della Società, in favore di: 
 Citicorp USA, Inc. con sede in 2 Penns Way, Suite 200 New Castle, Delaware, Stati Uniti
d'America; TPG Wafer Partners LLC c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America; 
 17 of
31

  TCW/Crescent Mezzanine Partners III, L.P. con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America;
TCW/Crescent Mezzanine Trust III, statutory business trust, con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; TCW/Crescent Mezzanine Partners III Netherlands, L.P., con sede in 11100 Santa Monica
Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors III, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors Side III, L.P., con sede in
11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America (i "Creditori Pignoratizi")
 a garanzia dell'integrale adempimento delle
obbligazioni denominate Investor Revolver Obligations (come definite nel Contratto di Pegno), ivi incluse quelle derivanti dallo stesso Contratto di Pegno, dall' Investor Revolving Credit Agreement e dagli altri Loan
Documents (come ivi definiti). Ai sensi del Contratto di Pegno, tuttavia, il diritto reale di garanzia di cui alla presente annotazione è a tutti gli effetti subordinato rispetto ai diritti di pegno di grado anteriore costituiti sul
Certificato a seguito dei contratti di cui alle precedenti lettere (a) e (b). 
 I diritti di voto, i diritti amministrativi connessi e il diritto a percepire i
dividendi inerenti alle azioni costituite in pegno e rappresentate dal Certificato sono regolati dalla Sezione 5 del Contratto di Pegno.
 Si dà atto che, ai
sensi del Contratto di Pegno, CITICORP USA, Inc., quale Collateral Agent, riceve il pegno di cui alla presente annotazione e pertanto, oltre a continuare a custodire ininterrottamente il Certificato nell'interesse e per conto dei Creditori
Pignoratizi di Primo Grado, viene ora a detenere il medesimo anche nell'interesse e per conto dei Creditori Pignoratizi, inclusi i loro successori e aventi causa, nonché delle New Secured Parties (come definite nel Contratto di Pegno).

 Si dà altresì atto che, ai sensi del Contratto di Pegno, i Creditori Pignoratizi hanno dato mandato a CITICORP USA, Inc., quale Collateral Agent,
a fare quanto necessario affinché la Società annoti sul Certificato, sia il trasferimento del presente pegno di secondo grado a favore di ogni successore o avente causa dei Creditori Pignoratizi sia l'estensione del presente pegno di
secondo grado a favore di nuovi soggetti che risultino creditori di MEMC Electronic Materials, Inc. in base a quanto previsto nel Contratto di Pegno (ivi definiti quali New Secured Parties), in entrambi i casi, con pari grado e diritti
rispetto alla garanzia reale costituita a favore dei Creditori Pignoratizi di cui alla presente annotazione.

	 
 
 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 EXHIBIT
B
 Text of the notation of the pledge to be inscribed on the shareholders' book of MEMC Electronic Materials S.p.A.
 Pursuant to the second degree deed of pledge (as amended on the same date by the Italian Supplement to the Investor Revolving
Pledge Agreement executed in the United States of America by way of exchange of correspondence) dated March 3, 2003 (the "Deed of Pledge"), by and between the sole shareholder MEMC Electronic Materials, Inc., a company duly incorporated and existing
under the laws of the United States of America, with registered office c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, United States of America, as pledgor, and CITICORP USA, Inc., a company duly
incorporated and existing under the laws of the United States of America, with registered office in 2 Penns Way, Suite 200 New Castle, Delaware and acting as Collateral Agent (as defined in the Pledge Agreement), in its own name and in the name and
on behalf of the Secured Parties (as specified hereinafter and defined in the Pledge Agreement as Secured Parties), 
 18 of 31

  MEMC Electronic Materials, Inc. pledged 42,250,000 ordinary shares of the Company - already pledged in favor of the secured parties and currently
kept in custody by CITICORP USA, Inc., pursuant to the first degree pledge agreements defined, under the Pledge Agreement: (a) Reimbursement Pledge Agreement, as supplemented by the Reimbursement Italian Supplement dated March 3, 2003 and (b) Bank
Revolver Pledge Agreement, as supplemented by the Bank Revolver Italian Supplement dated March 3, 2003 and executed by and between MEMC Electronic Materials, Inc., as pledgor, CITICORP USA, Inc., as collateral agent acting in its own name and in the
name and on behalf of the respective secured parties named therein (hereinafter, collectively, the "First Degree Secured Parties"), - represented by share certificate no. 64 ( the "Certificate") and representing in total 65% of the share capital of
the Company, for the benefit of:
 Citicorp USA, Inc. with registered office at 2 Penns Way, Suite 200 New Castle, Delaware, U.S.A.; TPG Wafer Partners LLC c/o The
Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, U.S.A.; TCW/Crescent Mezzanine Partners III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.;
TCW/Crescent Mezzanine Trust III, statutory business trust, with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; TCW/Crescent Mezzanine Partners III Netherlands, L.P., with registered office at 11100 Santa
Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; Green Equity Investors III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; Green Equity Investors Side III, L.P., with registered office
at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A. (the "Secured Parties")
 as security for the full payment and performance of the obligations
entitled Investor Revolver Obligations (as defined in the Deed of Pledge), including those derived from the same Deed of Pledge, from the Investor Revolving Credit Agreement and from the other Loan Documents (as therein defined). Pursuant to the
Deed of Pledge, however, the security interest referred to in this notation is to all effects subordinated to the senior rights of pledge created on the Certificate pursuant to the pledge agreements defined above in (a) and (b).
 The voting rights, the related administrative rights, and the right to receive dividends relating to the pledged shares represented by the Certificate are governed by Section 5 of
the Deed of Pledge.
 It is acknowledged that according to the Deed of Pledge, CITICORP USA, INC, as Collateral Agent, hereby receives the pledge referred to in this
notation, and thus, in addition to maintaining the uninterrupted custody of the Certificate on behalf of and in the interest of the First Degree Secured Parties, it now starts to keep the Certificate in custody also in the interest and on behalf of
the Secured Parties, including their successors and assignees, as well as for the New Secured Parties (as defined in the Deed of Pledge).
 It is also acknowledged that, pursuant to the
Deed of Pledge, the Secured Parties instructed CITICORP USA, Inc., as Collateral Agent, to take all necessary steps to have the Company inscribe on the Certificate both the transfer of this second degree pledge in favor of each successor or assignee
of the Secured Parties, and the extension of this second degree pledge for the benefit of any new party who may become a creditor of MEMC Electronic Materials, Inc., pursuant to the Deed of Pledge (defined therein as "New Secured Parties"), in
either case pari passu with and with the same rights attached to the security interest granted hereby in favor of the Secured Parties.

	 [Place, date and time]  	 ______________________
 A Director
  

 19 of
31

  EXHIBIT C
  Testo dell'annotazione del pegno
da apporre, al momento della loro emissione, da parte di un Amministratore sui certificati rappresentativi delle Nuove Azioni della MEMC Electronic Materials S.p.A. 
 Si prende e si dà atto che, ai sensi delle Sezioni 1 e 2 del contratto di pegno di secondo grado (come modificato, in pari data dall'accordo denominato Italian Supplement to the Investor Revolving
Pledge Agreement concluso negli Stati Uniti d'America attraverso scambio di corrispondenza) del 3 marzo 2003 (il "Contratto di Pegno") tra MEMC Electronic Materials, Inc., società di diritto statunitense, con sede legale c/o The
Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America, in qualità di costituente il pegno, e CITICORP USA, Inc., società di diritto statunitense, con sede legale in 2 Penns
Way, Suite 200 New Castle, Delaware e agente, in qualità di Collateral Agent (come definito nel Contratto di Pegno), sia in nome proprio sia in nome e per conto dei Creditori Pignoratizi (come di seguito indicati e definiti nel
Contratto di Pegno quali Secured Parties), le n. [ ] azioni di nuova emissione della MEMC Electronic Materials S.p.A. (la "Società") rappresentate dal presente certificato azionario n. [ ] (rispettivamente, le "Nuove Azioni" ovvero le
New Shares, come definite nel Contratto di Pegno, ed il "Nuovo Certificato") - già costituite in garanzia in base ai contratti di pegno di primo grado denominati, ai sensi del Contratto di Pegno (a) Reimbursement Pledge
Agreement, come modificato dal Reimbursement Italian Supplement del 3 marzo 2003 e (b) Bank Revolver Pledge Agreement, come modificato dal Bank Revolver Italian Supplement del 3 marzo 2003 e conclusi tra MEMC Electronic
Materials, Inc., in qualità di costituente il pegno, CITICORP USA, Inc., in qualità di collateral agent sia in nome proprio sia in nome e per conto dei rispettivi creditori pignoratizi ivi indicati (di seguito, collettivamente,
i "Creditori Pignoratizi di Primo Grado") - sono costituite in pegno dall'azionista MEMC Electronic Materials, Inc., in favore di:
 Citicorp USA, Inc. con sede in 2
Penns Way, Suite 200 New Castle, Delaware, Stati Uniti d'America; TPG Wafer Partners LLC c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America; TCW/Crescent Mezzanine Partners III,
L.P. con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; TCW/Crescent Mezzanine Trust III, statutory business trust, con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati
Uniti d'America; TCW/Crescent Mezzanine Partners III Netherlands, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors III, L.P., con sede in 11100 Santa Monica Blvd., Suite
2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors Side III, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America (i "Creditori Pignoratizi")
 a garanzia dell'integrale adempimento delle obbligazioni denominate Investor Revolver Obligations (come definite nel Contratto di Pegno), ivi incluse quelle derivanti
dallo stesso Contratto di Pegno, dall'Investor Revolving Credit Agreement e dagli altri Loan Documents (come ivi definiti). Ai sensi del Contratto di Pegno, tuttavia, il diritto reale di garanzia di cui alla presente annotazione
è a tutti gli effetti subordinato rispetto ai diritti di pegno di grado anteriore costituiti sul Nuovo Certificato a seguito dei contratti di cui alle precedenti lettere (a) e (b). 
 I diritti di voto, i diritti amministrativi connessi e il diritto a percepire i dividendi inerenti alle Nuove Azioni costituite in pegno e rappresentate dal Nuovo Certificato sono regolati dalla Sezione 5 del
Contratto di Pegno. 
 20 of 31

  Si prende e si dà atto che, secondo quanto previsto nella Sezione 1 del Contratto di Pegno, le Azioni della Società complessivamente
date in pegno (ivi incluse le Nuove Azioni costituite in pegno) a favore dei Creditori Pignoratizi di Primo Grado e dei Creditori Pignoratizi non eccedono il 65% del capitale sociale della Società.
 Si dà atto che, ai sensi del Contratto di Pegno, Citicorp USA, Inc., quale Collateral Agent, riceve il pegno di cui alla presente annotazione e pertanto oltre a continuare a custodire
ininterrottamente il Nuovo Certificato nell'interesse e per conto dei Creditori Pignoratizi di Primo Grado, viene ora a detenere il medesimo anche nell'interesse e per conto dei Creditori Pignoratizi, inclusi i loro successori e aventi causa,
nonché delle New Secured Parties (come definite nel Contratto di Pegno).
 Si dà altresì atto che, ai sensi del Contratto di
Pegno, i Creditori Pignoratizi hanno dato mandato a Citicorp USA, Inc., quale Collateral Agent, a fare quanto necessario affinchè la Società annoti sul Nuovo Certificato sia il trasferimento del presente pegno di secondo grado a
favore di ogni successore o avente causa dei Creditori Pignoratizi sia l'estensione del presente pegno di secondo grado a favore di nuovi soggetti che risultino creditori di MEMC Electronic Materials, Inc. in base a quanto previsto nel Contratto di
Pegno (ivi definiti New Secured Parties), in entrambi i casi, con pari grado e diritti rispetto alla garanzia reale costituita a favore dei Creditori Pignoratizi di cui alla presente annotazione. 

	 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 La
costituzione in garanzia di cui sopra è stata annotata sul libro soci in data odierna ai sensi del R.D. 29.3.1942 n. 239.

	 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  
	  	  

 
 EXHIBIT C
 Text of the
notation of the pledge to be inscribed by a Director on the certificates representing the New Shares of MEMC Electronic Materials S.p.A.
 It is acknowledged that, pursuant to Sections 1 and 2 the second degree deed of pledge (as amended on the same date by the Italian Supplement to the Investor Revolving Pledge Agreement executed in the
United States of America by way of exchange of correspondence) dated March 3, 2003 (the "Deed of Pledge"), by and between MEMC Electronic Materials, Inc., a company duly incorporated and existing under the laws of the United States of America, with
registered office c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, United States of America, as pledgor, and CITICORP USA, Inc., a company duly incorporated and existing under the laws of the United
States of America, with registered office at 2 Penns Way, Suite 200 New Castle, Delaware, and acting as Collateral Agent (as defined in the Pledge Agreement), in its own name and in the name and on behalf of the Secured Parties (specified
hereinafter and defined in the Pledge Agreement as "Secured Parties"), the shares of MEMC Electronic Materials S.p.A. (the "Company") represented by this share certificate No. [ ] (respectively, the "New Shares", as defined in the Deed of Pledge and
the "New Certificate") - already pledged in favor of the secured parties pursuant to the first degree pledge agreements defined under the Pledge Agreement: (a) Reimbursement Pledge Agreement, 
 21 of 31

  as supplemented by the Reimbursement Italian Supplement dated March 3, 2003 and (b) Bank Revolver Pledge Agreement, as supplemented by
the Bank Revolver Italian Supplement dated March 3, 2003 and executed by and between MEMC Electronic Materials, Inc., as pledgor, CITICORP USA, Inc., as collateral agent acting in its own name and in the name and on behalf of the secured
parties named therein (hereinafter collectively, the "First Degree Secured Parties"),- are hereby pledged by MEMC Electronic Materials, Inc., for the benefit of:
 Citicorp USA, Inc. with registered office at 2 Penns Way, Suite 200 New Castle, Delaware, U.S.A.; TPG Wafer Partners LLC c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington,
Delaware, U.S.A.; TCW/Crescent Mezzanine Partners III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; TCW/Crescent Mezzanine Trust III, statutory business trust, with registered office at 11100
Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; TCW/Crescent Mezzanine Partners III Netherlands, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; Green Equity Investors III, L.P.,
with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A.; Green Equity Investors Side III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, U.S.A. (the "Secured
Parties")
 as security for the full payment and performance of the obligations entitled Investor Revolver Obligations (as defined in the Deed of Pledge), including
those derived from the same Deed of Pledge, from the Investor Revolving Credit Agreement and from the other Loan Documents (as therein defined). Pursuant to the Deed of Pledge, however, the security interest referred to in this notation is to all
effects subordinated to the senior rights of pledge created on the New Certificate according to the pledge agreements defined above in (a) and (b).
 The voting rights,
the related administrative rights, and the right to receive dividends relating to the pledged New Shares and represented by the New Certificate are governed by Section 5 of the Deed of Pledge.
 It is acknowledged that pursuant to the Deed of Pledge, CITICORP USA, Inc., as Collateral Agent, hereby receives the pledge referred to in this notation, and thus, in addition to maintaining the uninterrupted
custody of the New Certificate on behalf of and in the interest of the First Degree Secured Parties, it now starts to hold the New Certificate in custody also for the interest and on behalf of the Secured Parties, including their successors and
assignees, as well as for the New Secured Parties (as defined in the Deed of Pledge).
 It is also acknowledged that, pursuant to the Deed of Pledge, the Secured Parties
have instructed CITICORP USA, Inc., as Collateral Agent, to take all necessary steps to have the Company inscribe on the New Certificate both the transfer of this second degree pledge in favor of each successor or assignee of the Secured Parties,
and the extension of this second degree pledge for the benefit of any new party who may become a creditor of MEMC Electronic Materials, Inc., pursuant to the Deed of Pledge (defined therein as "New Secured Parties"), in either case pari passu
with and with the same rights attached to the security interest granted hereby in favor of the Secured Parties.

	 [Place, date and time]  	 ______________________
 A Director
  

 The above creation of a
security interest is inscribed in the shareholders' book on today's date pursuant to Royal Degree 29.3.1942 No. 239.
 22 of 31

   

	 [Place, date and time]  	 ______________________
 A Director
  

 EXHIBIT
D
 Testo dell'annotazione del pegno sulle Nuove Azioni da apporre sul libro soci della MEMC Electronic Materials S.p.A.
 
 Si prende e si dà atto che, ai sensi delle Sezioni 1 e 2 del contratto di pegno di secondo grado (come modificato, in pari data dall'accordo denominato Italian Supplement
to the Investor Revolving Pledge Agreement concluso negli Stati Uniti d'America attraverso scambio di corrispondenza) del 3 marzo 2003 (il "Contratto di Pegno") tra il socio unico MEMC Electronic Materials, Inc., società di diritto
statunitense, con sede legale c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America, in qualità di costituente il pegno, e CITICORP USA, Inc., società di diritto
statunitense, con sede legale a 2 Penns Way, Suite 200, New Castle, Delaware, Stati Uniti d'America e agente, in qualità di Collateral Agent (come definito nel Contratto di Pegno), sia in nome proprio sia in nome e per conto dei
Creditori Pignoratizi (come di seguito indicati e definiti nel Contratto di Pegno quali Secured Parties), le n. [ ] azioni di nuova emissione della Società rappresentate dal presente certificato azionario n. [ ] (rispettivamente, le
"Nuove Azioni" ovvero le New Shares, come definite nel Contratto di Pegno, ed il "Nuovo Certificato") - già costituite in garanzia in base ai contratti di pegno di primo grado denominati, ai sensi del Contratto di Pegno, (a)
Reimbursement Pledge Agreement, come modificato dal Reimbursement Italian Supplement del 3 marzo 2003, e (b) Bank Revolver Pledge Agreement, come modificato dal Bank Revolver Italian Supplement del 3 marzo 2003, e
conclusi tra MEMC Electronic Materials, Inc., in qualità di costituente il pegno, Citicorp USA, Inc., in qualità di collateral agent, sia in nome proprio sia in nome e per conto dei rispettivi creditori pignoratizi ivi indicati
(di seguito, collettivamente, i "Creditori Pignoratizi di Primo Grado") - sono costituite in pegno dall'azionista MEMC Electronic Materials, Inc., in favore di:
 Citicorp USA, Inc. con sede in 2 Penns Way, Suite 200 New Castle, Delaware, Stati Uniti d'America; TPG Wafer Partners LLC c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington,
Delaware, Stati Uniti d'America; TCW/Crescent Mezzanine Partners III, L.P. con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; TCW/Crescent Mezzanine Trust III, statutory business trust, con sede
in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; TCW/Crescent Mezzanine Partners III Netherlands, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green
Equity Investors III, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti d'America; Green Equity Investors Side III, L.P., con sede in 11100 Santa Monica Blvd., Suite 2000 Los Angeles, California, Stati Uniti
d'America (i "Creditori Pignoratizi")
 a garanzia dell'integrale adempimento delle obbligazioni denominate Investor Revolver Obligations (come definite
nel Contratto di Pegno), ivi incluse quelle derivanti dallo stesso Contratto di Pegno, dall'Investor Revolving Credit Agreement e dagli altri Loan Documents (come ivi definiti). Ai sensi del Contratto di Pegno, tuttavia, il diritto
reale di garanzia di cui alla presente annotazione è a tutti gli effetti subordinato rispetto ai diritti di pegno di grado anteriore costituiti sul Nuovo Certificato a seguito dei contratti di cui alle precedenti lettere (a) e (b).

 I diritti di voto, i diritti amministrativi connessi e il diritto a percepire i dividendi inerenti alle Nuove 
 23 of 31

  Azioni costituite in pegno e rappresentate dal Nuovo Certificato sono regolati dalla Sezione 5 del Contratto di Pegno. 
 Si prende e si dà atto che, secondo quanto previsto nella Sezione 1 del Contratto di Pegno, le Azioni della Società complessivamente date in pegno (ivi incluse le
Nuove Azioni costituite in pegno) a favore dei Creditori Pignoratizi di Primo Grado e dei Creditori Pignoratizi non eccedono il 65% del capitale sociale della Società.
 Si dà atto che, ai sensi del Contratto di Pegno, Citicorp USA, Inc., quale Collateral Agent, riceve il pegno di cui alla presente annotazione e pertanto oltre a continuare a custodire
ininterrottamente il Nuovo Certificato nell'interesse e per conto dei Creditori Pignoratizi di Primo Grado, viene ora a detenere il medesimo anche nell'interesse e per conto dei Creditori Pignoratizi, inclusi i loro successori e aventi causa,
nonché delle New Secured Parties (come definite nel Contratto di Pegno).
 Si dà altresì atto che, ai sensi del Contratto di
Pegno, i Creditori Pignoratizi hanno dato mandato a Citicorp USA, Inc., quale Collateral Agent, a fare quanto necessario affinchè la Società annoti sul Nuovo Certificato sia il trasferimento del presente pegno di secondo grado a
favore di ogni successore o avente causa dei Creditori Pignoratizi sia l'estensione del presente pegno di secondo grado a favore di nuovi soggetti che risultino creditori di MEMC Electronic Materials, Inc. in base a quanto previsto nel Contratto di
Pegno (ivi definiti quali New Secured Parties), in entrambi i casi, con pari grado e diritti rispetto alla garanzia reale costituita a favore dei Creditori Pignoratizi di cui alla presente annotazione. 

	 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 
 EXHIBIT D
 Text of the annotation of the pledge on the New Shares to be inscribed on shareholders' book of MEMC Electronic
Materials S.p.A.
 It is acknowledged that, pursuant to Sections 1 and 2 of the second degree deed of
pledge (as amended on the same date by the Italian Supplement to the Investor Revolving Pledge Agreement executed in the United States of America by way of exchange of correspondence) dated March 3, 2003 (the "Deed of Pledge"), by and between the
sole shareholder MEMC Electronic Materials, Inc., a company duly incorporated and existing under the laws of the United States of America, with registered office c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street
Wilmington, Delaware, United States of America , as pledgor, and CITICORP USA, Inc., a company incorporated under the laws of the United States of America, with registered office at 2 Penns Way, Suite 200 New Castle, Delaware, as Collateral Agent
(as defined in the Pledge Agreement), acting in its own name and in the name and on behalf of the Secured Parties (as specified hereinafter and defined in the Pledge Agreement as "Secured Parties"), the shares of the Company represented by this
share certificate No. [●] (respectively, the "New Shares", as defined in the Deed of Pledge and the "New Certificate") - already pledged in favor of the secured parties pursuant to the first degree pledge agreements defined under the Pledge
Agreement: (a) Reimbursement Pledge Agreement, as supplemented by the Reimbursement Italian Supplement dated March 3, 2003 and (b) Bank Revolver Pledge Agreement, as supplemented by the Bank Revolver Italian Supplement dated March 3, 2003 executed
by and between MEMC Electronic Materials, Inc., as pledgor, CITICORP USA, Inc., as collateral agent acting in its own name and in the name and on behalf of the respective secured parties named therein (hereinafter, collectively, the "First Degree
Secured Parties"), - are hereby pledged by the sole shareholder MEMC Electronic Materials, Inc., for the benefit of:
 24 of 31

  Citicorp USA, Inc. with registered office at 2 Penns Way, Suite 200 New Castle, Delaware, U.S.A.; TPG Wafer Partners LLC c/o The Corporation Trust
Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, U.S.A.; TCW/Crescent Mezzanine Partners III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, CA 90025, U.S.A.; TCW/Crescent Mezzanine Trust
III, statutory business trust, with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, CA 90025, U.S.A.; TCW/Crescent Mezzanine Partners III Netherlands, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los
Angeles, CA 90025, U.S.A.; Green Equity Investors III, L.P., with registered office at 11100 Santa Monica Blvd., Suite 2000 Los Angeles, CA 90025, U.S.A.; Green Equity Investors Side III, L.P., with registered office at 11100 Santa Monica Blvd.,
Suite 2000 Los Angeles, CA 90025, U.S.A. (the "Secured Parties")
 as security for the full payment or performance of the obligations entitled Investor Revolver
Obligations (as defined in the Deed of Pledge), including those derived from the same Deed of Pledge, from the Investor Revolving Credit Agreement and from the other Loan Documents (as therein defined). According to the terms of the Deed of Pledge,
however, the security interest referred to in this notation is to all effects subordinated to the senior rights of pledge created on the New Certificate pursuant to the pledge agreements defined above in (a) and (b).
 The voting rights, the related administrative rights, and the right to receive dividends relating to the pledges New Shares represented by the New Certificate are governed by
Section 5 of the Deed of Pledge.
 It is also acknowledged that according to the Deed of Pledge, CITICORP USA, Inc, as Collateral Agent, hereby receives the pledge
referred to in this notation, and thus, in addition to maintaining the uninterrupted custody of the New Certificate on behalf of and in the interest of the First Degree Secured Parties, it now starts to hold the New Certificate in custody also in
the interest and on behalf of the Secured Parties, including their successors and assignees, as well as for the New Secured Parties (as defined in the Deed of Pledge).
 It is also acknowledged that, pursuant to the terms of the Deed of Pledge, the Secured Parties have instructed CITICORP USA, Inc., as Collateral Agent, to take all necessary steps to have the Company inscribe on
the New Certificate both the transfer of this second degree pledge in favor of each successor or assignee of the Secured Parties, and the extension of this second degree pledge for the benefit of any new party who may become a creditor of MEMC
Electronic Materials, Inc., as set out in the Deed of Pledge (defined therein as "New Secured Parties"), in either case pari passu with and with the same rights as the security interest granted hereby in favor of the Secured
Parties.

	 [Place, date and time]  	 ______________________
 A Director
  

 
 EXHIBIT E
 Testo dell'annotazione del pegno a favore di Nuovi Creditori Pignoratizi da apporre da parte di un
Amministratore sui certificati azionari della MEMC Electronic Materials S.p.A.
 25 of 31

  Si prende e si dà atto che, su richiesta di CITICORP USA, INC., società di diritto statunitense con sede a 2 Penns Way, Suite 200 New Castle,
Delaware, Stati Uniti d'America, e agente anche in nome e per conto del [inserire la denominazione sociale del Nuovo Creditore Pignoratizio], società di diritto [ ], con sede legale in [ ], ai sensi della Sezione 2 del contratto di
pegno di secondo grado (come modificato, in pari data, dall'accordo denominato Italian Supplement to the Investor Revolving Pledge Agreement concluso negli Stati Uniti d'America, attraverso scambio di corrispondenza) del 3 marzo 2003 (il
"Contratto di Pegno") tra MEMC Electronic Materials, Inc., società di diritto statunitense, con sede legale c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America, in
qualità di costituente il pegno, e Citicorp USA, Inc., agente, in qualità di Collateral Agent (come definito nel Contratto di Pegno), sia in nome proprio sia in nome e per conto dei Creditori Pignoratizi (come definiti nel
Contratto di Pegno), il pegno di secondo grado, già costituito sul presente certificato azionario n. [ ] (il "Certificato", attualmente custodito da Citicorp USA, Inc.) da MEMC Electronic Materials, Inc., in favore dei Creditori Pignoratizi
si intende esteso, con pari grado e diritti, anche a favore di [inserire la denominazione sociale del Nuovo Creditore Pignoratizio], a garanzia dell'integrale adempimento delle obbligazioni nei confronti di [inserire la denominazione
sociale del Nuovo Creditore Pignoratizio] denominate Investor Revolver Obligations (come definite nel Contratto di Pegno), ivi incluse quelle derivanti dallo stesso Contratto di Pegno, dall'Investor Revolving Credit Agreement e dai
Loan Documents, tra cui il contratto denominato [ ] del [ ], concluso in [ ], tra [inserire la denominazione sociale delle parti, incluso il Nuovo Creditore Pignoratizio]. 
 Si dà atto che il pegno di secondo grado costituito sul Certificato è regolato dal Contratto di Pegno, in quanto applicabile e, pertanto, i diritti di voto, i diritti amministrativi connessi e il
diritto a percepire i dividendi inerenti alle azioni rappresentate dal Certificato sono regolati dalla sezione 5 del Contratto di Pegno. 
 Si dà altresì
atto che, ai sensi del Contratto di Pegno, Citicorp USA, Inc., quale Collateral Agent, riceve il pegno di cui alla presente annotazione e pertanto, oltre a continuare a custodire ininterrottamente il Certificato nell'interesse e per conto dei
Creditori Pignoratizi, ivi inclusi i loro successori, aventi causa e le New Secured Parties (come definite nel Contratto di Pegno), viene ora a custodire il medesimo anche nell'interesse e per conto di [inserire la denominazione sociale
del Nuovo Creditore Pignoratizio], ivi inclusi i suoi successori e aventi causa. 
 Si dà infine atto che il pegno di secondo grado esteso a favore di
[inserire la denominazione sociale del Nuovo Creditore Pignoratizio] per effetto della presente annotazione ha lo stesso grado e diritti della garanzia reale costituita sul Certificato a favore dei Creditori Pignoratizi in base al Contratto
di Pegno, ferma restando l'esistenza di due pegni di grado anteriore sul Certificato costituiti a seguito del (a) Reimbursement Pledge Agreement, come modificato dal Reimbursement Italian Supplement del 3 marzo 2003 e (b) Bank
Revolver Pledge Agreement, come modificato dal Bank Revolver Italian Supplement del 3 marzo 2003 e conclusi tra MEMC Electronic Materials, Inc., in qualità di costituente il pegno, Citicorp USA, Inc., in qualità di
collateral agent sia in nome proprio sia in nome e per conto dei rispettivi creditori pignoratizi ivi indicati. 

	 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 La
costituzione in garanzia di cui sopra è stata annotata sul libro soci in data odierna ai sensi del R.D. 29.3.1942 n. 239.
 26 of 31

	 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 
 EXHIBIT E
 Text of the notation of the pledge in favor of the New Secured Parties to be inscribed by a Director on the
share certificates of MEMC Electronic Materials S.p.A.
 It is hereby acknowledged that, upon request of
CITICORP USA, Inc., a company duly incorporated and existing under the laws of Delaware, with registered office at 2, Penns Way, Suite 200, New Castle, United States of America, acting also in the name and on behalf of [name of the New Secured
Party], a company existing under the laws of [ ], with registered office at [ ], pursuant to Section 2 of the second degree deed of pledge (as amended, on the same date, by the Italian Supplement to the Investor Revolving Pledge Agreement executed
in the United States of America by way of exchange of correspondence) on March 3, 2003, (the "Deed of Pledge"), by and between MEMC Electronic Materials, Inc., a company duly incorporated and existing under the laws of Delaware, with registered
office at [ ], United States of America, as pledgor, and CITICORP USA, Inc., acting in its capacity as Collateral Agent (as defined in the Deed of Pledge) in its own name and in the name and on behalf of the Secured Parties (as defined in the Deed
of Pledge), the second degree pledge, already existing on this share certificate No. [ ] (the "Certificate") (currently held in custody by CITICORP USA, Inc.), created by MEMC Electronic Materials, Inc. in favor of the Secured Parties is hereby
extended, pari passu and with equal rights, also in favor of [name of the New Secured Party], as security for the full payment and performance of the Investor Revolver Obligations (as defined in the Deed of Pledge) with respect to [name of
the New Secured Party], including those obligations arising from the Deed of Pledge, from the Investor Revolving Credit Agreement and from the Loan Documents, including the agreement executed in [ ], on [ ], by and between [name of the parties
thereof, including the New Secured Party].
 It is acknowledged that the second degree pledge created on the Certificate is governed by the Deed of Pledge, where
applicable and, therefore, the voting rights, the right to receive dividends and the relating administrative rights, are governed by Section 5 of the Deed of Pledge.
 It is also acknowledged that, pursuant to the Deed of Pledge, CITICORP USA, Inc., in its capacity as Collateral Agent, hereby receives the pledge to which this notation pertains and, thus, in addition to
maintaining the uninterrupted custody of the Certificate in the interest and on behalf of the Secured Parties, including their successors or assignees, and the New Secured Parties (as defined in the Deed of Pledge), it now starts to keep the
Certificate in custody also on behalf of [name of New Secured Party] including its successors or assignees.
 Lastly, it is acknowledged that the second degree pledge
extended in favor of the [name of New Secured Party] grants the same rights of, and is pari passu with, the security interest created on the Certificate in favor of the Secured Parties pursuant to the Deed of Pledge, it being understood that
on the Certificate have already been created two senior security interests pursuant to (a) the Bank Revolver Pledge Agreement, as supplemented by the Bank Revolver Italian Supplement dated March 3, 2003 and (b) the Reimbursement Pledge Agreement as
supplemented by the Reimbursement Italian Supplement dated March 3, 2003 entered into by and between MEMC Electronic Materials, Inc., in its capacity as pledgor, and CITICORP USA, Inc., in its capacity as Collateral Agent acting in its own name and
in the name, and on behalf of, the Secured Parties defined therein.
 27 of 31

	 [Place, date and time]  	 ______________________
 A Director
  

 
 A notation regarding
the above security interest has been made in the shareholders' book of MEMC Electronic Materials S.p.A. pursuant to Royal Decree No. 239/42.

	 [Place, date and time]  	 ______________________
 A Director
  

 
 EXHIBIT F
 Testo dell'annotazione del pegno a favore di Nuovi Creditori Pignoratizi da apporre sul libro soci di MEMC
Electronic Materials S.p.A.
 Si prende e si dà atto che, su richiesta di CITICORP USA, Inc.,
società di diritto statunitense con sede a 2 Penns Way, Suite 200 New Castle, Delaware, Stati Uniti d'America, ed agente anche in nome e per conto di [inserire la denominazione sociale del Nuovo Creditore Pignoratizio], società
di diritto [ ], con sede legale in [ ], ai sensi della Sezione 2 del contratto di pegno di secondo grado (come modificato, in pari data, dall'accordo denominato Italian Supplement to the Investor Revolving Pledge Agreement concluso negli
Stati Uniti d'America, attraverso scambio di corrispondenza) del 3 marzo 2003 (il "Contratto di Pegno") tra il socio unico MEMC Electronic Materials, Inc., società di diritto statunitense, con sede legale c/o The Corporation Trust Company
Corporation Trust Center 1209 Orange Street Wilmington, Delaware, Stati Uniti d'America, in qualità di costituente il pegno, e CITICORP USA, Inc., agente in qualità di Collateral Agent (come definito nel Contratto di
Pegno), sia in proprio nome sia in nome e per conto dei Creditori Pignoratizi (come definiti nel Contratto di Pegno), il pegno di secondo grado, già esistente sul presente certificato azionario n. [ ] (il "Certificato", attualmente
custodito da Citicorp USA, Inc.) costituito da MEMC Electronic Materials, Inc. a favore dei Creditori Pignoratizi, si intende esteso, con pari grado e diritti, anche a favore di [inserire la denominazione sociale del Nuovo Creditore
Pignoratizio], a garanzia dell'integrale adempimento delle obbligazioni nei confronti di [inserire la denominazione sociale del Nuovo Creditore Pignoratizio] denominate Investor Revolver Obligations (come definite nel Contratto di
Pegno), ivi incluse quelle derivanti dallo stesso Contratto di Pegno, dall'Investor Revolving Credit Agreement e dai Loan Documents, tra cui il contratto denominato [ ] del [ ], concluso in [ ], tra [inserire la denominazione
sociale delle parti incluso il Nuovo Creditore Pignoratizio].
 Si dà atto che il pegno di secondo grado costituito sul Certificato è regolato dal
Contratto di Pegno, in quanto applicabile, e, pertanto, i diritti di voto, i diritti amministrativi connessi e il diritto a percepire i dividendi inerenti alle azioni rappresentate dal Certificato sono regolati dalla Sezione 5 del Contratto di Pegno
[inserire la denominazione sociale del Nuovo Creditore Pignoratizio], ivi inclusi i suoi successori e aventi causa. 
 Si dà atto infine che il pegno di
secondo grado esteso a favore di [inserire la denominazione sociale del Nuovo Creditore Pignoratizio] ha lo stesso grado e diritti della garanzia reale costituita sul Certificato a favore dei Creditori Pignoratizi in base al Contratto di
Pegno, ferma restando l'esistenza sul Certificato di due pegni di grado anteriore costituiti a seguito del (a) Reimbursement Pledge Agreement, come modificato dal Reimbursement Italian Supplement del 3 marzo 2003 e (b) Bank Revolver
Pledge Agreement, come modificato dal Bank Revolver Italian Supplement del 3 marzo 2003, e conclusi tra MEMC Electronic Materials, Inc., in qualità di costituente il pegno, Citicorp USA, Inc., in qualità di collateral
agent, sia in nome proprio sia in nome e per conto dei rispettivi creditori pignoratizi ivi 
 28 of 31

  indicati..

	 [Luogo e Data ed ora]  	 ______________________
 Un Amministratore
  

 
 EXHIBIT F
 Text of the notation of the pledge in favor of the New Secured Parties to be inscribed in the 

shareholders' book of MEMC Electronic Materials S.p.A.
 It is hereby acknowledged that, upon the request of CITICORP USA, Inc., a company duly incorporated and existing under the laws of the United States of America, with registered office at 2 Penns Way, Suite 200,
New Castle, Delaware, United States of America, acting also in the name and on behalf of [name of the New Secured Party], a company existing under the laws of [ ], with registered office at [ ], pursuant to Section 2 of the second degree deed of
pledge (as amended, on the same date, by the Italian Supplement to the Investor Revolving Pledge Agreement executed in the United States of America by way of exchange of correspondence) dated March 3, 2003, (the "Deed of Pledge"), by and between the
sole shareholder MEMC Electronic Materials, Inc., a company duly incorporated and existing under the laws of Delaware, United States of America, with registered office at [ ],United States of America, as pledgor, and CITICORP USA, Inc., in its
capacity as Collateral Agent (as defined therein), in its own name, and in the name and on behalf of the Secured Parties (as defined in the Deed of Pledge), the second degree pledge, already existing on 42,500,000 ordinary shares of the Company
represented by share certificate No. 64 (currently held by CITICORP USA, Inc.), (the "Certificate") and corresponding, in total, to 65% of the Company's corporate stock, created by MEMC Electronic Materials, Inc., in favor of the Secured Parties is
hereby extended, pari passu and with equal rights, also in favor of [name of the New Secured Party], as security for the full payment or punctual performance of the Investor Revolver Obligations (as defined in the Deed of Pledge) with respect
to [name of the New Secured Party], including those obligations arising from the Deed of Pledge, from the Investor Revolving Credit Agreement and from the Loan Documents, including the agreement executed in [ ], on [ ], by and between [name of the
parties thereof, including the New Secured Party].
 It is acknowledged that the second degree pledge created on the Certificate is governed by the Deed of Pledge, where
applicable and, therefore, the voting rights, the right to receive dividends and the relating administrative rights, are governed by Section 5 of the Deed of Pledge.
 It is also acknowledged that, pursuant to the Deed of Pledge, CITICORP USA, Inc., in its capacity as Collateral Agent, hereby receives the pledge to which this notation pertains and, thus, in addition to
maintaining the uninterrupted custody of the Certificate in the interest and on behalf of the Secured Parties, including their successors or assignees, and the New Secured Parties (as defined in the Deed of Pledge) it now starts to keep the
Certificate in custody also on behalf of [name of New Secured Party] including its successors or assignees.
 Lastly, it is also acknowledged that the second degree
pledge extended in favor of the [name of New Secured Party] grants the same rights of, and is pari passu with, the security interest created on the Certificate in favor of the Secured Parties pursuant to the Deed of Pledge, it being
understood that on the Certificate have already been created two senior security interests pursuant to (a) the Bank Revolver Pledge Agreement, as supplemented by the Bank Revolver Italian Supplement dated March 3, 2003 and (b) the Reimbursement
Pledge Agreement as supplemented by the Reimbursement Italian Supplement dated March 3, 2003 entered into by and between MEMC Electronic Materials, Inc., in its capacity as 
 29 of 31

  pledgor, and CITICORP USA, Inc., in its capacity as Collateral Agent in its own name and in the name, and on behalf of, the Secured Parties
defined therein.

	 [Place, date and time]  	 ______________________
 A Director
  

 
 EXHIBIT G
 [Letterhead of Citicorp USA, Inc.]
 New Secured Party Notice

	 To:   	 Chairman of the Board of Directors
 MEMC Electronic Materials S.p.A.
 Viale Gherzi n. 31
 Novara
 Italy  
	  	  
	 c.c.:  	 MEMC Electronic Materials, Inc.
 c/o The Corporation Trust Company
 Corporation Trust Center
 1209 Orange Street
 Wilmington, Delaware
 To the attention
of General Counsel  
	  	  
	 From:  	 Citicorp USA, Inc.  
	  	  
	 Dated  	 [ ]  
	  	  
	 Re:  	 Italian Supplement to the Investor Revolver Pledge Agreement dated March 3, 2003  

 
   Dear Sirs,

	 	1.	 We refer to the deed of pledge (Contratto di pegno) executed and delivered by way of exchange of correspondence in the United States of America on March 3,
2003, by and between MEMC Electronic Materials, Inc., Pledgor, and Citibank USA, Inc., Collateral Agent, also in the name and on behalf of the Secured Parties, as supplemented by an Italian supplement of even date (the "Italian Supplement to the
Investor Revolver Pledge Agreement"). This is a New Secured Party Notice. The terms in capital letters shall bear the meanings indicated beside each one of them or, absent any indication, shall have the same meaning assigned to them under the
"Italian Supplement to the Investor Revolver Pledge Agreement". 
	 	 	 
	 	 	 

 
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	 	2.	We confirm that, pursuant to [insert details of the Loan Document pursuant to which the New Secured Party has become a Loan Party], [insert corporate name of
the New Secured Party], a company incorporated under the laws of [ ], with registered office in [ ], has become a Lender under the Investor Revolver Credit Agreement. 
	 	 	 
	 	3.	Pursuant to Section 2 of the "Italian Supplement to the Investor Revolver Pledge Agreement", we request to annotate the extension of the Pledge in favor of [insert
corporate name of the New Secured Party] on the Certificate [add, if applicable: and on the certificates representing the New Shares], substantially in the form indicated in Exhibit E to the "Italian Supplement to the Investor Revolver
Pledge Agreement". We also request to annotate such extension of the Pledge in the shareholders' book of MEMC Electronic Materials S.p.A. substantially in the form indicated in Exhibit F to the "Italian Supplement to the Investor Revolver Pledge
Agreement". 
	 	 	 
	 	 	 [Date]
 
	 	 	 
	 	 	Signed:
	 	 	 
	 	 	Citicorp USA, Inc.
	 	 	 
	 	 	[Name]
	 	 	 
	 	 	[Title]

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