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Institutional Holdings of MEMC ELECTRONIC MATERIALS, INC. (WFR) on 12/31/2009

1. Company Information

Company/StockMEMC ELECTRONIC MATERIALS, INC. (stock symbol: WFR)
Funds Ownership361 out of total 2720 funds (13%) own this stock
Funds own total 193,752,856 shares, 86.67% of all outstanding shares
Funds SOLD -3,082,088 shares (-1.57%) in the quarter ended on 12/31/2009

2. Top 20 Funds Held WFR in this Quarter (By Shares)

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)FMR LLC30,791,297Cut -2.23%0.09%13.77%
2.)VANGUARD GROUP INC10,301,208Added 0.03%0.03%4.61%
3.)STATE STREET CORP7,757,873Added 6.41%0.02%3.47%
4.)PRICE T ROWE ASSOCIATES INC MD 6,450,630Added 0.12%0.04%2.89%
5.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA6,333,925New0.02%2.83%
6.)OPPENHEIMER FUNDS INC6,234,945Added 58.83%0.15%2.79%
7.)ARTISAN PARTNERS LTD PARTNERSHIP5,579,040Cut -0.92%0.32%2.50%
8.)D E SHAW & CO INC4,887,954Cut -33.05%0.18%2.19%
9.)WELLINGTON MANAGEMENT CO LLP4,644,500Added 39.87%0.03%2.08%
10.)BARCLAYS PLC4,008,200CALLAdded 134.77%0.09%1.79%
11.)EPOCH INVESTMENT PARTNERS INC3,957,894Cut -22.45%0.59%1.77%
12.)BLACKROCK GROUP LTD3,842,570Added 90.38%0.05%1.72%
13.)IG INVESTMENT MANAGEMENT LTD3,687,100Added 7.27%0.23%1.65%
14.)BLACKROCK FUND ADVISORS3,024,760New0.02%1.35%
15.)SHUMWAY CAPITAL PARTNERS LLC2,805,417New0.44%1.25%
16.)FIL LTD2,729,112Added 33.84%0.14%1.22%
17.)CLAIRVOYANCE CAPITAL ADVISORS INC2,455,691Added 2,132.45%14.50%1.10%
18.)NORTHERN TRUST CORP2,376,925Cut -5.43%0.02%1.06%
19.)NATIXIS2,366,367Added 1,631.45%0.85%1.06%
20.)BANK OF NEW YORK MELLON CORP2,127,288Added 16.75%0.02%0.95%

3. Top 20 Funds Held WFR in this Quarter (By % of Fund Reported Portfolio)

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)CLAIRVOYANCE CAPITAL ADVISORS INC2,455,691Added 2,132.45%14.50%1.10%
2.)AAD CAPITAL MANAGEMENT LP130,000Added 160.00%5.38%0.06%
3.)FOYSTON GORDON & PAYNE INC1,076,648Added 155.96%2.72%0.48%
4.)HAWKSHAW CAPITAL MANAGEMENT LLC280,100Cut -21.51%2.61%0.13%
5.)MOON CAPITAL MANAGEMENT LP204,712Added 139.39%2.57%0.09%
6.)SYMMETRY PEAK MANAGEMENT LLC600,000CALLAdded 100.00%2.36%0.27%
7.)MESSNER & SMITH THEME VALUE INVESTMENT MANAGEMENT LTD CA 209,461Added 49.45%2.27%0.09%
8.)STELLIAM INVESTMENT MANAGEMENT LP575,000Added 130.00%1.82%0.26%
9.)BLACK RIVER ASSET MANAGEMENT LLC379,038Added 9,874.68%1.78%0.17%
10.)SYMONS CAPITAL MANAGEMENT INC242,393Added 0.97%1.45%0.11%
11.)STEWARDSHIP PARTNERS INVESTMENT COUNSEL INC145,597Added 9.03%1.31%0.07%
12.)U CAPITAL GROUP LP50,000Unchanged1.31%0.02%
13.)EDEN CAPITAL MANAGEMENT PARTNERS LP92,600New1.26%0.04%
14.)CONTRARIUS INVESTMENT MANAGEMENT LTD99,720New1.26%0.04%
15.)LOGAN CAPITAL MANAGEMENT INC800,018Added 48.99%1.18%0.36%
16.)GREENWICH WEALTH MANAGEMENT LLC500,000Unchanged1.16%0.22%
17.)GUINNESS ATKINSON ASSET MANAGEMENT INC108,280Unchanged1.13%0.05%
18.)EMPIRE CAPITAL MANAGEMENT LLC575,000CALLNew1.04%0.26%
19.)BREMER TRUST NATIONAL ASSOCIATION85,553Added 47.32%0.98%0.04%
20.)KESTREL INVESTMENT MANAGEMENT CORP420,000Unchanged0.94%0.19%

4. Top 20 Funds BOUGHT NEW WFR in this Quarter (By Shares)

No.FundSharesPut/Call% Port.% Out. Shrs
1.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA6,333,9250.02%2.83%
2.)BLACKROCK FUND ADVISORS3,024,7600.02%1.35%
3.)SHUMWAY CAPITAL PARTNERS LLC2,805,4170.44%1.25%
4.)JENNISON ASSOCIATES LLC1,762,6000.04%0.79%
5.)DELAWARE MANAGEMENT BUSINESS TRUST852,1000.05%0.38%
6.)CITADEL ADVISORS LLC732,900PUT0.02%0.33%
7.)CITADEL ADVISORS LLC685,5070.02%0.31%
8.)EMPIRE CAPITAL MANAGEMENT LLC575,000CALL1.04%0.26%
9.)CITADEL ADVISORS LLC560,000CALL0.02%0.25%
10.)RICE HALL JAMES & ASSOCIATES LLC332,1680.43%0.15%
11.)PLURAL INVESTMENTS LLC298,6100.49%0.13%
12.)FOUNDATION RESOURCE MANAGEMENT INC264,2730.62%0.12%
13.)JENNISON ASSOCIATES LLC228,8000.01%0.10%
14.)SUMITOMO TRUST & BANKING CO LTD FI193,5590.02%0.09%
15.)GAM HOLDING LTD157,0000.06%0.07%
16.)SYMMETRY PEAK MANAGEMENT LLC155,2400.61%0.07%
17.)ALGER FRED MANAGEMENT INC152,8000.02%0.07%
18.)VERITION FUND MANAGEGMENT LLC145,5290.74%0.07%
19.)RANDOLPH CO INC143,1000.54%0.06%
20.)COMMERZBANK AKTIENGESELLSCHAFT FI140,8660.03%0.06%

5. Top 20 Funds SOLD OUT WFR in this Quarter (By Shares)

No.FundSharesPut/Call% Port.% Out. Shrs
1.)BARCLAYS GLOBAL INVESTORS UK HOLDINGS LTD10,160,3580.03%4.54%
2.)GARDNER LEWIS ASSET MANAGEMENT L P4,072,5931.67%1.82%
3.)MASSACHUSETTS FINANCIAL SERVICES CO MA 3,297,6500.09%1.48%
4.)CALAMOS ADVISORS LLC3,211,4030.23%1.44%
5.)ALKEON CAPITAL MANAGEMENT LLC1,547,3001.49%0.69%
6.)ZEVENBERGEN CAPITAL INVESTMENTS LLC1,313,7201.07%0.59%
7.)GARTMORE INVESTMENT MANAGEMENT LTD1,060,8000.35%0.47%
8.)MOODY ALDRICH PARTNERS LLC891,8511.94%0.40%
9.)MERRILL LYNCH & CO INC772,4530.02%0.35%
10.)CRITERION CAPITAL MANAGEMENT LLC660,0001.27%0.30%
11.)DG CAPITAL MANAGEMENT INC659,4120.81%0.29%
12.)SEASONS CAPITAL MANAGEMENT LLC411,4210.38%0.18%
13.)CITADEL L P380,800PUT0.01%0.17%
14.)PEAK6 INVESTMENTS LP372,400CALL0.04%0.17%
15.)RBC CAPITAL MARKETS ARBITRAGE SA333,2910.07%0.15%
16.)CITADEL L P329,5790.01%0.15%
17.)PIONEER INVESTMENT MANAGEMENT INC316,3310.02%0.14%
18.)DEKABANK DEUTSCHE GIROZENTRALE306,7600.11%0.14%
19.)CORRIENTE ADVISORS LLC299,2632.44%0.13%
20.)CITADEL L P299,100CALL0.01%0.13%