| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Invesco Ltd. | 4,776,655 | 3.69 | $4,203,456 | 30-Sep-09 | | BlackRock Group Limited | 3,983,984 | 3.08 | $3,505,905 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 3,787,817 | 2.92 | $3,333,278 | 30-Sep-09 | | AXA | 3,613,556 | 2.79 | $3,179,929 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 3,152,485 | 2.43 | $2,774,186 | 30-Sep-09 | | KBC Group NV | 1,333,427 | 1.03 | $1,173,415 | 30-Jun-09 | | RENAISSANCE TECHNOLOGIES, LLC | 1,322,434 | 1.02 | $1,163,741 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,164,933 | .90 | $1,025,141 | 30-Sep-09 | | MILLENNIUM MANAGEMENT LLC | 1,000,000 | .77 | $880,000 | 30-Sep-09 | | Claymore Advisors, LLC | 835,537 | .64 | $735,272 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Powershares Exhg Traded Fd Tr-POWERSHARES WILDERHILL CLEAN E | 4,632,975 | 3.58 | $3,660,050 | 31-Jul-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 1,306,085 | 1.01 | $1,149,354 | 30-Jun-09 | | VANGUARD SMALL-CAP INDEX FUND | 1,000,846 | .77 | $880,744 | 30-Jun-09 | | DFA U.S. SMALL CAP SERIES | 712,637 | .55 | $705,510 | 30-Apr-09 | | DFA U.S. MICRO CAP SERIES | 677,284 | .52 | $670,511 | 30-Apr-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 527,145 | .41 | $463,887 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 526,873 | .41 | $521,604 | 30-Apr-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 411,330 | .32 | $361,970 | 30-Jun-09 | | CALVERT IMPACT FUND, INC-CALVERT GLOBAL ALTERNATIVE ENERGY F | 397,503 | .31 | $349,802 | 30-Jun-09 | | DFA Tax Managed U.S. Targeted Value Port | 368,931 | .28 | $291,455 | 31-Jul-09 |
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*
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Value shown is computed using the security's price on the report date given.
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