| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BlackRock Group Limited | 1,631,700 | 3.59 | $66,605,994 | 30-Sep-09 | | FMR LLC | 1,229,396 | 2.71 | $50,183,944 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 852,048 | 1.88 | $34,780,599 | 30-Sep-09 | | Impax Asset Management Ltd. | 835,217 | 1.84 | $34,093,557 | 30-Sep-09 | | STANDARD LIFE INVESTMENTS (USA) LIMITED | 786,846 | 1.73 | $32,119,053 | 30-Sep-09 | | Invesco Ltd. | 663,337 | 1.46 | $27,077,416 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 627,382 | 1.38 | $25,609,733 | 30-Sep-09 | | Pictet Asset Management Ltd | 618,546 | 1.36 | $25,249,047 | 30-Sep-09 | | KBC Group NV | 609,498 | 1.34 | $24,568,864 | 30-Jun-09 | | UBS GLOBAL ASSET MANAGEMENT (AMERICAS) INC | 605,017 | 1.33 | $24,696,793 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY GROWTH COMPANY FUND | 1,191,996 | 2.62 | $48,657,276 | 30-Sep-09 | | Powershares Exhg Traded Fd Tr-POWERSHARES WILDERHILL CLEAN E | 494,531 | 1.09 | $19,578,482 | 31-Jul-09 | | NEW ALTERNATIVES FUND INC | 285,000 | .63 | $11,633,700 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 248,926 | .55 | $10,034,207 | 30-Jun-09 | | VANGUARD EXPLORER FUND, INC. | 246,700 | .54 | $9,766,853 | 31-Jul-09 | | LEUTHOLD CORE INVESTMENT FUND | 195,795 | .43 | $7,992,351 | 30-Sep-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 189,326 | .42 | $7,631,731 | 30-Jun-09 | | CALVERT IMPACT FUND, INC-CALVERT GLOBAL ALTERNATIVE ENERGY F | 157,779 | .35 | $6,360,071 | 30-Jun-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 157,500 | .35 | $6,348,825 | 30-Jun-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 110,770 | .24 | $4,465,138 | 30-Jun-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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