| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | JANUS CAPITAL MANAGEMENT, LLC | 3,256,400 | 6.25 | $14,100,212 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,872,550 | 3.59 | $8,108,141 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,690,548 | 3.24 | $7,320,072 | 30-Sep-09 | | Soundpost Partners, LP | 1,400,000 | 2.69 | $6,062,000 | 30-Sep-09 | | WISCONSIN (STATE OF) INVESTMENT BOARD | 1,288,872 | 2.47 | $5,580,815 | 30-Sep-09 | | WELLINGTON MANAGEMENT COMPANY, LLP | 1,232,837 | 2.37 | $5,338,184 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 1,073,726 | 2.06 | $4,649,233 | 30-Sep-09 | | ESSEX INVESTMENT MANAGEMENT CO INC | 1,006,669 | 1.93 | $4,358,876 | 30-Sep-09 | | PRICE (T.ROWE) ASSOCIATES INC | 1,001,200 | 1.92 | $4,335,196 | 30-Sep-09 | | STATE STREET CORPORATION | 992,670 | 1.90 | $4,298,261 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | JANUS VENTURE FUND | 1,096,843 | 2.10 | $4,749,330 | 30-Sep-09 | | PRICE (T.ROWE) SMALL CAP STOCK FUND | 800,000 | 1.53 | $3,464,000 | 30-Sep-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 707,922 | 1.36 | $1,946,785 | 30-Jun-09 | | JANUS GLOBAL LIFE SCIENCES FUND | 682,130 | 1.31 | $2,953,622 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 679,145 | 1.30 | $2,940,697 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 427,010 | .82 | $1,174,277 | 30-Jun-09 | | Janus Triton Fund | 402,088 | .77 | $1,741,041 | 30-Sep-09 | | THOMPSON PLUMB GROWTH FUND | 356,950 | .68 | $1,545,593 | 30-Sep-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 284,599 | .55 | $782,647 | 30-Jun-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 270,673 | .52 | $744,350 | 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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