| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Invesco Ltd. | 3,946,583 | 5.90 | $17,128,170 | 30-Sep-09 | | SAM Sustainable Asset Management Ltd | 2,000,000 | 2.99 | $8,680,000 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,950,960 | 2.92 | $8,467,166 | 30-Sep-09 | | Shell Asset Management Company | 1,931,100 | 2.89 | $8,380,974 | 30-Sep-09 | | Hudson Bay Capital Management LP | 1,812,689 | 2.71 | $7,867,070 | 30-Sep-09 | | HARTFORD INVESTMENT MANAGEMENT COMPANY INC. | 1,031,819 | 1.54 | $4,478,094 | 30-Sep-09 | | STATE STREET CORPORATION | 872,001 | 1.30 | $3,784,484 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 655,887 | .98 | $2,846,549 | 30-Sep-09 | | NORTHERN TRUST CORPORATION | 555,492 | .83 | $2,238,632 | 30-Jun-09 | | PIEDMONT INVESTMENT ADVISERS | 357,900 | .53 | $1,553,286 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Powershares Exhg Traded Fd Tr-POWERSHARES WILDERHILL CLEAN E | 4,224,180 | 6.31 | $18,079,490 | 31-Jul-09 | | ISHARES RUSSELL 2000 INDEX FD | 760,540 | 1.14 | $3,300,743 | 30-Sep-09 | | HARTFORD SMALL COMPANY HLS FUND, INC. | 428,000 | .64 | $1,724,840 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 400,069 | .60 | $1,736,299 | 30-Sep-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY FD | 229,200 | .34 | $923,676 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 228,113 | .34 | $919,295 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 220,330 | .33 | $887,929 | 30-Jun-09 | | HARTFORD SMALL COMPANY FUND | 214,367 | .32 | $917,490 | 31-Jul-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 206,365 | .31 | $831,650 | 30-Jun-09 | | AMERICAN CENTURY VEEDOT FUND | 190,000 | .28 | $824,600 | 30-Sep-09 |
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Value shown is computed using the security's price on the report date given.
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