SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* TCW GROUP INC (Last) (First) (Middle) 865 SOUTH FIGUEROA STREET, SUITE 2100 (Street) LOS ANGELES CA 90017 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol MEMC ELECTRONIC MATERIALS INC [ WFR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 08/18/2003
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $.01 per share	08/18/2003		S		197,000(1)(2)(3)(4)(5)(6)	D	$11.027	159,473,526(1)(2)(3)(4)(5)(6)	I(1)(2)(3)(4)(5)(6)	SEE FOOTNOTES(1)(2)(3)(4)(5)(6)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Warrants Exercisable For Common Stock	$3							07/10/2002	11/13/2011	Common Stock, Par Value $.01 Per Share	3,283,333(2)(3)(4)(5)(6)		3,283,333(2)(3)(4)(5)(6)	I(2)(3)(4)(5)(6)	SEE FOOTNOTES(2)(3)(4)(5)(6)

Explanation of Responses:

1. TCW/Crescent Mezzanine Partners III, L.P. ("TCW Partners") and TCW/Crescent Mezzanine Trust III ("TCW Trust") are parties to the Amended and Restated LLC Operating Agreement of TPG Wafer Holdings, LLC ("Wafer Holdings"), and the Members' Agreement, each dated as of November 13, 2001, among the shareholders named therein which beneficially own in the aggregate over 10% of the Issuer's Common Stock. Those agreements were filed as Exhibits 12 and 13 to the Schedule 13D filed by Wafer Holdings et al. on November 21, 2001. A Side Letter dated January 25, 2002 added TCW/Crescent Mezzanine III Netherlands, L.P. ("TCW Netherlands"; and together with TCW Partners and TCW Trust, the "TCW Record Owners") as a party to those agreements. The Side Letter was filed as Exhibit 25 to the Schedule 13D/A filed by Wafer Holdings, et al. on January 25, 2002. Neither the Reporting Person nor the parties described herein other than the TCW Record Owners is a party to or bound by the Agreements.

2. The warrants reported above are owned directly by the TCW Record Owners. The shares of disposed Common Stock reported above were distributed to the TCW Record Owners pursuant to a pro rata distribution by Wafer Holdings to its members, and at the time of sale were owned directly by the TCW Record Owners. All other shares of Common Stock reported above are owned directly by Wafer Holdings, of which each of the TCW Record Owners is a member. The TCW Record Owners disclaim beneficial ownership of securities reported as directly owned by Wafer Holdings except to the extent of the Record Owners' pecuniary interest as members of Wafer Holdings. All of the securities described above are indirectly owned by others to the extent described below.

3. TCW/Crescent Mezzanine III, LLC ("Mezzanine LLC") is the General Partner of TCW Partners and TCW Netherlands and the Managing Owner of TCW Trust, and disclaims beneficial ownership of securities reported as indirectly owned except to the extent of its pecuniary interest as General Partner or Managing Owner, as applicable. TCW/Crescent Mezzanine Management III, LLC ("Management III") is the Investment Advisor of each of the TCW Record Owners, and has delegated all investment and voting discretion with respect to the securities to TCW Asset Management Company ("TAMCO"), as investment sub-advisor. TAMCO, as the sub-advisor to each of the TCW Record Owners, the Managing Member of Management III and a member of Mezzanine LLC, disclaims beneficial ownership of securities reported as indirectly owned except to the extent of any pecuniary interest.

4. TAMCO is wholly owned by The TCW Group, Inc., a Nevada corporation ("TCWG"), which disclaims beneficial ownership of securities reported as indirectly owned except to the extent of any pecuniary interest in TAMCO by virtue of TCWG's ownership of TAMCO.

5. TCWG, together with its direct and indirect subsidiaries, collectively constitute The TCW Group, Inc. business unit (the "TCW Business Unit"). The TCW Business Unit is primarily engaged in the provision of investment management services. The ultimate parent company of TCWG is Soci??t?? G??n??rale, S.A., a company incorporated under the laws of France ("SG"). The principal business of SG is acting as a holding company for a global financial services group, which includes certain distinct specialized business units that are independently operated, including the TCW Business Unit. SG, for purposes of the federal securities laws, may be deemed ultimately to control TCWG and the TCW Business Unit. SG, its executive officers and directors, and its direct and indirect subsidiaries (including all of its business units except the TCW Business Unit), may beneficially own securities of the Issuer and such securities are not reported in this statement.

6. In accordance with Exchange Act Release No. 34-39538 (January 12, 1998) and due to the separate management and independent operation of its business units, SG disclaims beneficial ownership of securities of the Issuer beneficially owned by the TCW Business Unit. Each member of the TCW Business Unit disclaims beneficial ownership of securities of the Issuer beneficially owned by SG and any of SG's other business units.

	Sean Plater, Authorized Signatory	08/20/2003
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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