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Institutional Holdings of MEMC ELECTRONIC MATERIALS, INC. (WFR) on 12/31/2011

1. Company Information

Company/StockMEMC ELECTRONIC MATERIALS, INC. (stock symbol: WFR)
Funds Ownership231 out of total 3028 funds (8%) own this stock
Funds own total 179,817,021 shares, 78.04% of all outstanding shares
Funds SOLD -21,824,375 shares (-10.82%) in the quarter ended on 12/31/2011

2. Top 20 Funds Held WFR in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)THORNBURG INVESTMENT MANAGEMENT INC25,242,322Added 11.40%0.52%10.96%
2.)VANGUARD GROUP INC10,749,654Cut -9.47%0.01%4.67%
3.)LUMINUS MANAGEMENT LLC10,233,486Added 287.75%3.54%4.44%
4.)PROXIMA CAPITAL MANAGEMENT LLC6,234,251Added 19.89%4.84%2.71%
5.)ALTAI CAPITAL MANAGEMENT LP6,137,980Added 50.37%9.24%2.66%
6.)DNB NOR ASSET MANAGEMENT AS5,748,067Added 10.65%0.91%2.49%
7.)STATE STREET CORP5,076,205Cut -30.60%0.00%2.20%
8.)BLACKROCK FUND ADVISORS5,051,246Added 63.22%0.01%2.19%
9.)WENTWORTH HAUSER & VIOLICH4,752,100Added 82.44%0.17%2.06%
10.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA4,114,256Cut -28.55%0.00%1.79%
11.)CROSSLINK CAPITAL INC3,958,000Added 54.89%1.60%1.72%
12.)RUSSELL FRANK CO 3,811,583Added 32.29%0.03%1.65%
13.)THIRD POINT LLC3,750,000New0.59%1.63%
14.)MACQUARIE GROUP LTD3,301,337Cut -0.01%0.04%1.43%
15.)JMP ASSET MANAGEMENT LLC3,000,000Added 3.45%2.63%1.30%
16.)PRICE T ROWE ASSOCIATES INC MD 2,779,800Cut -85.87%0.00%1.21%
17.)THIRD AVENUE MANAGEMENT LLC2,760,881Cut -29.94%0.27%1.20%
18.)BANK OF NEW YORK MELLON CORP2,701,617Added 1.96%0.00%1.17%
19.)SCHNEIDER CAPITAL MANAGEMENT CORP2,679,880Cut -23.29%0.92%1.16%
20.)DIMENSIONAL FUND ADVISORS INC2,557,468Cut -15.09%0.01%1.11%



3. Top 20 Funds Held WFR in this Quarter (By % of Portfolio) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)ALTAI CAPITAL MANAGEMENT LP6,137,980Added 50.37%9.24%2.66%
2.)PROXIMA CAPITAL MANAGEMENT LLC6,234,251Added 19.89%4.84%2.71%
3.)LUMINUS MANAGEMENT LLC10,233,486Added 287.75%3.54%4.44%
4.)VEGA ENERGY GP LLC1,291,624New3.35%0.56%
5.)JMP ASSET MANAGEMENT LLC3,000,000Added 3.45%2.63%1.30%
6.)BRIGHTFIELD CAPITAL MANAGEMENT LLC500,000Added 42.86%2.44%0.22%
7.)CROSSLINK CAPITAL INC3,958,000Added 54.89%1.60%1.72%
8.)BASCOM HILL PARTNERS LLC296,001Added 213.23%1.31%0.13%
9.)BASCOM HILL PARTNERS LLC267,400CALLAdded 43.76%1.18%0.12%
10.)ARTORIUS MANAGEMENT LLC60,000New1.13%0.03%
11.)ECOFIN LTD761,701New0.94%0.33%
12.)SCHNEIDER CAPITAL MANAGEMENT CORP2,679,880Cut -23.29%0.92%1.16%
13.)DNB NOR ASSET MANAGEMENT AS5,748,067Added 10.65%0.91%2.49%
14.)NEEDHAM INVESTMENT MANAGEMENT LLC952,500Cut -11.40%0.86%0.41%
15.)NCM CAPITAL ADVISERS INC790,286Added 12.85%0.74%0.34%
16.)THIRD POINT LLC3,750,000New0.59%1.63%
17.)EMPIRE CAPITAL MANAGEMENT LLC1,150,000New0.57%0.50%
18.)GLENROCK INC209,900Cut -63.67%0.54%0.09%
19.)THORNBURG INVESTMENT MANAGEMENT INC25,242,322Added 11.40%0.52%10.96%
20.)NCM CAPITAL MANAGEMENT GROUP INC357,567Cut -35.82%0.51%0.16%

4. Top 20 Funds BOUGHT NEW WFR in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)THIRD POINT LLC3,750,0000.59%1.63%
2.)AQR CAPITAL MANAGEMENT LLC1,723,7300.04%0.75%
3.)HBK INVESTMENTS L P1,546,7250.17%0.67%
4.)VEGA ENERGY GP LLC1,291,6243.35%0.56%
5.)EMPIRE CAPITAL MANAGEMENT LLC1,150,0000.57%0.50%
6.)ECOFIN LTD761,7010.94%0.33%
7.)ARROWSTREET CAPITAL LIMITED PARTNERSHIP655,8000.02%0.28%
8.)QS INVESTORS LLC415,3000.03%0.18%
9.)GABELLI FUNDS LLC270,0000.01%0.12%
10.)VERITION FUND MANAGEGMENT LLC157,7120.13%0.07%
11.)TWO SIGMA INVESTMENTS LLC151,6140.01%0.07%
12.)EIDELMAN VIRANT CAPITAL139,4000.43%0.06%
13.)QUANTITATIVE INVESTMENT MANAGEMENT LLC124,1000.04%0.05%
14.)LMR MASTER FUND LTD100,4270.08%0.04%
15.)LIBERTY MUTUAL GROUP ASSET MANAGEMENT INC88,8470.02%0.04%
16.)AXA83,7000.00%0.04%
17.)ARTORIUS MANAGEMENT LLC60,0001.13%0.03%
18.)NEA MANAGEMENT COMPANY LLC53,9810.01%0.02%
19.)ZURCHER KANTONALBANK (ZURICH CANTONALBANK)35,0000.01%0.02%
20.)MANLEY ASSET MANAGEMENT L P35,0000.29%0.02%

5. Top 20 Funds SOLD OUT WFR in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)EPOCH INVESTMENT PARTNERS INC6,958,9700.31%3.02%
2.)VAN DEN BERG MANAGEMENT INC TX4,761,3202.03%2.07%
3.)STRS OHIO3,980,0000.11%1.73%
4.)RIMA MANAGEMENT LLC1,965,9523.18%0.85%
5.)KINGDON CAPITAL MANAGEMENT LLC1,900,0000.37%0.82%
6.)RHJ INTERNATIONAL SA1,473,0351.18%0.64%
7.)ROYAL CAPITAL MANAGEMENT LLC1,084,0001.03%0.47%
8.)ANTHION MANAGEMENT LLC903,5361.20%0.39%
9.)TIMBER HILL LLC698,200PUT0.01%0.30%
10.)TIMBER HILL LLC608,100CALL0.01%0.26%
11.)ADAGE CAPITAL PARTNERS GP LLC314,6000.01%0.14%
12.)GW CAPITAL MANAGEMENT LLC291,1040.05%0.13%
13.)TD ASSET MANAGEMENT INC281,8450.01%0.12%
14.)HONEYWELL INTERNATIONAL INC280,0000.06%0.12%
15.)MESSNER & SMITH THEME VALUE INVESTMENT MANAGEMENT LTD CA 254,5081.71%0.11%
16.)RAYMOND JAMES & ASSOCIATES247,5310.03%0.11%
17.)ING GROEP NV173,6000.02%0.08%
18.)PASSPORT CAPITAL LLC150,000CALL0.05%0.07%
19.)CAISSE DE DEPOT ET PLACEMENT DU QUEBEC144,6000.00%0.06%
20.)TIMBER HILL LLC139,4760.00%0.06%