| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Barclays Global Investors UK Holdings Ltd | 4,747,309 | 7.13 | $72,159,096 | 30-Sep-09 | | SECTORAL ASSET MANAGEMENT, INC. | 3,833,544 | 5.75 | $58,269,868 | 30-Sep-09 | | DSC Advisors, L.P. | 3,514,555 | 5.28 | $53,421,236 | 30-Sep-09 | | PALO ALTO INVESTORS, LLC | 3,480,354 | 5.22 | $52,901,380 | 30-Sep-09 | | OPPENHEIMER FUNDS, INC. | 3,391,304 | 5.09 | $51,547,820 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 2,623,291 | 3.94 | $39,874,023 | 30-Sep-09 | | STATE STREET CORPORATION | 2,427,265 | 3.64 | $36,894,428 | 30-Sep-09 | | UBS AG | 2,125,621 | 3.19 | $32,309,439 | 30-Sep-09 | | ALGER (FRED) MANAGEMENT INC | 2,041,715 | 3.06 | $31,034,068 | 30-Sep-09 | | CR Intrinsic Investors, LLC | 1,938,537 | 2.91 | $29,465,762 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | COLUMBIA ACORN FD | 2,000,000 | 3.00 | $27,660,000 | 30-Jun-09 | | FEDERATED KAUFMANN FUND | 1,000,000 | 1.50 | $15,590,000 | 31-Jul-09 | | ISHARES RUSSELL 2000 INDEX FD | 893,969 | 1.34 | $13,588,328 | 30-Sep-09 | | ISHARES S&P SMALLCAP 600 INDEX FD | 857,279 | 1.29 | $10,801,715 | 31-Oct-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 749,243 | 1.12 | $10,362,030 | 30-Jun-09 | | VANGUARD SMALL-CAP INDEX FUND | 743,741 | 1.12 | $10,285,938 | 30-Jun-09 | | FRANKLIN STRATEGIC SERIES-FRANKLIN SMALL-MID CAP GROWTH | 680,000 | 1.02 | $10,336,000 | 30-Sep-09 | | OPPENHEIMER MAIN STREET OPPORTUNITIES FUND | 607,400 | .91 | $9,469,366 | 31-Jul-09 | | ISHARES NASDAQ BIOTECHNOLOGY INDEX FUND | 504,806 | .76 | $6,360,555 | 31-Oct-09 | | SMALLCAP WORLD FUND | 500,000 | .75 | $6,915,000 | 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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