| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BRIDGER MANAGEMENT LLC | 1,942,050 | 6.27 | $15,575,241 | 30-Sep-09 | | Kohlberg Kravis Roberts & Co. L.P. | 9,942,946 | 32.08 | $79,742,426 | 30-Sep-09 | | ESSEX INVESTMENT MANAGEMENT CO INC | 756,231 | 2.44 | $6,064,972 | 30-Sep-09 | | Valinor Management, LLC | 618,445 | 2.00 | $4,959,928 | 30-Sep-09 | | Adams Street Partners, LLC | 545,598 | 1.76 | $4,375,695 | 30-Sep-09 | | MORGAN STANLEY | 366,305 | 1.18 | $2,937,766 | 30-Sep-09 | | Oak Hill Investment Management LP | 314,347 | 1.01 | $2,521,062 | 30-Sep-09 | | BOGLE INVESTMENT MANAGEMENT LP | 290,691 | .94 | $2,331,341 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 259,359 | .84 | $2,080,059 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 215,843 | .70 | $1,731,060 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 238,457 | .77 | $1,738,351 | 31-Aug-09 | | FIDELITY SELECT PORTFOLIOS - BIOTECHNOLOGY | 186,465 | .60 | $1,495,449 | 30-Sep-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 170,520 | .55 | $630,924 | 30-Jun-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 37,119 | .12 | $297,694 | 30-Sep-09 | | SPARTAN TOTAL MARKET INDEX FUND | 15,000 | .05 | $120,300 | 30-Sep-09 | | FIDELITY ADVISOR BIOTECHNOLOGY FUND | 8,735 | .03 | $70,054 | 30-Sep-09 | | REYNOLDS BLUE CHIP GROWTH FUND, INC. | 6,000 | .02 | $48,120 | 30-Sep-09 | | FBR Pegasus Small Cap Growth Fund | 4,400 | .01 | $25,872 | 31-Jul-09 | | ProShares Tr-Ultra Russell 2000 ProShares Fd | 2,780 | .01 | $2,780 | 31-May-09 | | JNL SERIES TRUST-JNL/MELLON CAP SMALL CAP INDEX FUND | 2,000 | .01 | $1,780 | 31-Mar-09 |
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Value shown is computed using the security's price on the report date given.
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