| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | MORGAN STANLEY | 2,201,791 | 5.78 | $51,257,694 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 2,141,100 | 5.62 | $49,844,808 | 30-Sep-09 | | WESTFIELD CAPITAL MANAGEMENT COMPANY | 1,600,650 | 4.20 | $37,263,132 | 30-Sep-09 | | STATE STREET CORPORATION | 1,559,507 | 4.09 | $36,305,322 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,502,922 | 3.94 | $34,988,024 | 30-Sep-09 | | Invus Public Equities Advisors, LLC | 1,480,000 | 3.88 | $34,454,400 | 30-Sep-09 | | JANUS CAPITAL MANAGEMENT, LLC | 1,394,253 | 3.66 | $32,458,209 | 30-Sep-09 | | AXA | 1,374,950 | 3.61 | $32,008,836 | 30-Sep-09 | | TURNER INVESTMENT PARTNERS, INC. | 1,205,437 | 3.16 | $28,062,573 | 30-Sep-09 | | FMR LLC | 5,428,006 | 14.24 | $126,363,979 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY GROWTH COMPANY FUND | 3,234,906 | 8.49 | $75,308,611 | 30-Sep-09 | | FIDELITY SELECT PORTFOLIOS - BIOTECHNOLOGY | 1,613,484 | 4.23 | $37,561,907 | 30-Sep-09 | | SPDR (R) Ser Tr-SPDR (R) S&P (R) Biotech ETF | 645,962 | 1.69 | $18,209,668 | 30-Jun-09 | | ISHARES RUSSELL 2000 INDEX FD | 558,873 | 1.47 | $13,010,563 | 30-Sep-09 | | PRICE (T.ROWE) HEALTH SCIENCES FUND | 525,000 | 1.38 | $14,799,750 | 30-Jun-09 | | JENNISON SECTOR FDS-JENNISON HEALTH SCIENCES FD | 516,056 | 1.35 | $11,673,186 | 31-Aug-09 | | Legg Mason Partners Small Cap Growth Fd | 460,884 | 1.21 | $10,729,379 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 460,510 | 1.21 | $12,981,776 | 30-Jun-09 | | VARIABLE INSURANCE PRODUCTS FD II-CONTRAFUND PORTFOLIO | 452,000 | 1.19 | $10,522,560 | 30-Sep-09 | | TURNER EMERGING GROWTH FUND | 363,762 | .95 | $10,254,450 | 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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