| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | HEARTLAND ADVISORS INC. | 4,832,950 | 6.26 | $20,636,696 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 3,994,435 | 5.17 | $17,056,237 | 30-Sep-09 | | Invesco Ltd. | 3,355,406 | 4.34 | $14,327,583 | 30-Sep-09 | | TCW GROUP, INC. (THE) | 3,194,114 | 4.14 | $13,638,866 | 30-Sep-09 | | Sound Energy Partners Inc. | 3,155,154 | 4.09 | $13,472,507 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 2,736,053 | 3.54 | $11,682,946 | 30-Sep-09 | | ESSEX INVESTMENT MANAGEMENT CO INC | 2,094,002 | 2.71 | $8,941,388 | 30-Sep-09 | | KBC Group NV | 1,716,512 | 2.22 | $7,175,020 | 30-Jun-09 | | BlackRock Group Limited | 1,626,273 | 2.11 | $6,944,185 | 30-Sep-09 | | STATE STREET CORPORATION | 1,578,237 | 2.04 | $6,739,071 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Powershares Exhg Traded Fd Tr-POWERSHARES WILDERHILL CLEAN E | 3,700,702 | 4.79 | $14,839,815 | 31-Jul-09 | | HEARTLAND VALUE FUND | 3,000,000 | 3.88 | $12,540,000 | 30-Jun-09 | | ISHARES RUSSELL 2000 INDEX FD | 959,686 | 1.24 | $4,097,859 | 30-Sep-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 759,720 | .98 | $3,175,629 | 30-Jun-09 | | VANGUARD SMALL-CAP INDEX FUND | 757,730 | .98 | $3,167,311 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 550,242 | .71 | $1,749,769 | 30-Apr-09 | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 522,340 | .68 | $1,906,541 | 31-Aug-09 | | CALVERT IMPACT FUND, INC-CALVERT GLOBAL ALTERNATIVE ENERGY F | 487,543 | .63 | $2,037,929 | 30-Jun-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 478,110 | .62 | $1,998,499 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 411,212 | .53 | $1,755,875 | 30-Sep-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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