| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | GILDER, GAGNON, HOWE & CO. | 4,172,000 | 2.13 | $5,507,040 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 3,333,638 | 1.70 | $4,400,402 | 30-Sep-09 | | SG Americas Securities, LLC | 2,944,615 | 1.50 | $3,886,891 | 30-Sep-09 | | Perimeter Capital Partners LLC | 2,940,905 | 1.50 | $3,881,994 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,840,003 | .94 | $2,428,803 | 30-Sep-09 | | Hudson Bay Capital Management LP | 1,763,217 | .90 | $2,327,446 | 30-Sep-09 | | Winslow Management Company | 1,733,689 | .88 | $2,288,469 | 30-Sep-09 | | Susquehanna International Group, LLP | 1,710,737 | .87 | $2,258,172 | 30-Sep-09 | | Invesco Ltd. | 1,342,813 | .68 | $1,772,513 | 30-Sep-09 | | Perella Weinberg Partners Capital Management LP | 1,275,000 | .65 | $1,683,000 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Professionally Managed Portf-Winslow Green Growth Fund | 5,900,000 | 3.01 | $7,788,000 | 30-Sep-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 1,930,826 | .98 | $1,602,585 | 30-Jun-09 | | Powershares Exgh Traded Fd Tr II-Pwrshs Global Clean Energy | 1,290,687 | .66 | $1,484,290 | 31-Jul-09 | | Advisors Inner Circle Fd II-Perimeter Small Cap Growth Fund | 846,151 | .43 | $973,073 | 31-Jul-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 832,719 | .42 | $691,156 | 30-Jun-09 | | Transamerica Partners Fd-Small Growth Port | 621,975 | .32 | $516,239 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 585,231 | .30 | $468,184 | 30-Apr-09 | | Professionally Managed Portf-Winslow Green Solutions Fund | 364,543 | .19 | $481,196 | 30-Sep-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 284,878 | .15 | $376,038 | 30-Sep-09 | | Powershares Exhg Traded Fd-Powershares Wilderhill Prog Energ | 253,880 | .13 | $291,962 | 31-Jul-09 |
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Value shown is computed using the security's price on the report date given.
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