| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Barclays Global Investors UK Holdings Ltd | 1,718,614 | 5.19 | $23,252,847 | 30-Sep-09 | | PRICE (T.ROWE) ASSOCIATES INC | 1,584,200 | 4.79 | $21,434,226 | 30-Sep-09 | | AXA | 1,113,889 | 3.36 | $15,070,918 | 30-Sep-09 | | BB BIOTECH AG | 888,099 | 2.68 | $12,015,979 | 30-Sep-09 | | ALGER (FRED) MANAGEMENT INC | 5,307,433 | 16.03 | $71,809,568 | 30-Sep-09 | | FMR LLC | 3,683,976 | 11.13 | $49,844,195 | 30-Sep-09 | | STATE STREET CORPORATION | 525,006 | 1.59 | $7,103,331 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 454,549 | 1.37 | $6,150,047 | 30-Sep-09 | | DUQUESNE CAPITAL MANAGEMENT, LLC | 375,000 | 1.13 | $5,073,750 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 354,877 | 1.07 | $4,801,485 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY CONTRAFUND INC | 1,162,076 | 3.51 | $15,722,888 | 30-Sep-09 | | ALGER SMALL CAP GROWTH INSTITUTIONAL PORTFOLIO | 777,112 | 2.35 | $10,949,508 | 31-Jul-09 | | ALGER MIDCAP GROWTH INSTITUTIONAL PORTFOLIO | 703,774 | 2.13 | $9,916,175 | 31-Jul-09 | | ALGER HEALTH SCIENCES PORTFOLIO | 703,737 | 2.13 | $9,915,654 | 31-Jul-09 | | PRICE (T.ROWE) NEW HORIZONS FUND | 685,100 | 2.07 | $9,269,403 | 30-Sep-09 | | PRICE (T.ROWE) SMALL-CAP VALUE FUND | 485,000 | 1.47 | $6,562,050 | 30-Sep-09 | | Pacific Select Fund-Small Cap Growth Portfolio | 467,430 | 1.41 | $6,997,427 | 30-Jun-09 | | Fidelity Small Cap Growth Fund | 433,000 | 1.31 | $6,100,970 | 31-Jul-09 | | ISHARES RUSSELL 2000 INDEX FD | 420,705 | 1.27 | $5,692,138 | 30-Sep-09 | | ALGER SMIDCAP GROWTH FUND | 375,550 | 1.13 | $5,291,499 | 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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