| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BlackRock Group Limited | 3,098,591 | 7.72 | $198,743,626 | 30-Sep-09 | | FMR LLC | 2,448,088 | 6.10 | $157,020,364 | 30-Sep-09 | | MAVERICK CAPITAL LTD. | 2,365,898 | 5.90 | $151,748,697 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,816,032 | 4.53 | $116,480,292 | 30-Sep-09 | | DEUTSCHE BANK AKTIENGESELLSCHAFT | 1,577,026 | 3.93 | $101,150,447 | 30-Sep-09 | | Invesco Ltd. | 1,572,243 | 3.92 | $100,843,666 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,529,487 | 3.81 | $98,101,296 | 30-Sep-09 | | EARNEST PARTNERS LLC | 1,470,108 | 3.66 | $94,292,727 | 30-Sep-09 | | PRICE (T.ROWE) ASSOCIATES INC | 1,355,430 | 3.38 | $86,937,280 | 30-Sep-09 | | WADDELL & REED FINANCIAL INC. | 1,241,525 | 3.09 | $79,631,413 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Powershares Exhg Traded Fd-Powershares Water Resources | 1,035,445 | 2.58 | $54,019,165 | 31-Jul-09 | | PRICE (T.ROWE) MID CAP GROWTH FUND | 800,000 | 1.99 | $51,312,000 | 30-Sep-09 | | Munder Mid-Cap Core Growth Fund | 631,031 | 1.57 | $34,750,877 | 30-Jun-09 | | WADDELL & REED ADVISORS FDS-SCIENCE & TECHNOLOGY FUND | 603,100 | 1.50 | $33,212,717 | 30-Jun-09 | | VANGUARD SMALL-CAP INDEX FUND | 481,577 | 1.20 | $26,520,445 | 30-Jun-09 | | LORD ABBETT RESEARCH FUND, SMALL-CAP VALUE SERIES | 367,667 | .92 | $20,144,474 | 31-Aug-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 365,995 | .91 | $20,155,344 | 30-Jun-09 | | Powershares Exhg Traded Fd Tr-POWERSHARES WILDERHILL CLEAN E | 344,277 | .86 | $17,960,931 | 31-Jul-09 | | FIDELITY VALUE FUND | 341,897 | .85 | $21,929,273 | 30-Sep-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 305,159 | .76 | $16,805,106 | 30-Jun-09 |
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Value shown is computed using the security's price on the report date given.
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