| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | FEDERATED INVESTORS, INC. | 7,649,677 | 7.78 | $111,455,793 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 5,785,105 | 5.88 | $84,288,979 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 5,524,563 | 5.62 | $80,492,882 | 30-Sep-09 | | STATE STREET CORPORATION | 3,205,091 | 3.26 | $46,698,175 | 30-Sep-09 | | OPPENHEIMER FUNDS, INC. | 3,010,600 | 3.06 | $43,864,442 | 30-Sep-09 | | Clearbridge Advisors, LLC | 2,255,838 | 2.29 | $32,867,559 | 30-Sep-09 | | SECTORAL ASSET MANAGEMENT, INC. | 2,000,713 | 2.03 | $29,150,388 | 30-Sep-09 | | FMR LLC | 14,718,917 | 14.96 | $214,454,620 | 30-Sep-09 | | WADDELL & REED FINANCIAL INC. | 1,789,550 | 1.82 | $26,073,743 | 30-Sep-09 | | PINNACLE ASSOCIATES, LTD. | 1,783,261 | 1.81 | $25,982,112 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY GROWTH COMPANY FUND | 9,832,981 | 9.99 | $143,266,533 | 30-Sep-09 | | FEDERATED KAUFMANN FUND | 6,880,757 | 6.99 | $125,780,237 | 31-Jul-09 | | OPPENHEIMER GLOBAL OPPORTUNITIES FUND | 3,000,000 | 3.05 | $49,500,000 | 30-Jun-09 | | VANGUARD EXPLORER FUND, INC. | 1,691,749 | 1.72 | $30,925,171 | 31-Jul-09 | | FIDELITY OTC PORTFOLIO | 1,548,049 | 1.57 | $22,555,073 | 30-Sep-09 | | VANGUARD STRATEGIC EQUITY FUND | 1,525,802 | 1.55 | $25,175,733 | 30-Jun-09 | | ISHARES RUSSELL 2000 INDEX FD | 1,368,756 | 1.39 | $19,942,774 | 30-Sep-09 | | WADDELL & REED ADVISORS FDS-SCIENCE & TECHNOLOGY FUND | 1,150,300 | 1.17 | $18,979,950 | 30-Jun-09 | | VANGUARD SMALL-CAP INDEX FUND | 1,131,182 | 1.15 | $18,664,503 | 30-Jun-09 | | SPDR (R) Ser Tr-SPDR (R) S&P (R) Biotech ETF | 1,079,311 | 1.10 | $17,808,631 | 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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