| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | RENAISSANCE TECHNOLOGIES, LLC | 317,369 | 1.26 | $2,078,766 | 30-Sep-09 | | BBT Capital Management, Inc. | 260,000 | 1.04 | $1,703,000 | 30-Sep-09 | | NUMERIC INVESTORS, LLC | 196,377 | .78 | $1,286,269 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 192,855 | .77 | $1,263,200 | 30-Sep-09 | | AXA | 179,180 | .71 | $1,173,629 | 30-Sep-09 | | STATE STREET CORPORATION | 174,573 | .70 | $1,143,453 | 30-Sep-09 | | HAMBRECHT & QUIST CAPITAL MANAGEMENT, INC. | 174,224 | .69 | $1,141,167 | 30-Sep-09 | | MPM Asset Management, LLC | 130,496 | .52 | $854,748 | 30-Sep-09 | | WESTFIELD CAPITAL MANAGEMENT COMPANY | 102,348 | .41 | $670,379 | 30-Sep-09 | | BRIDGEWAY CAPITAL MANAGEMENT, INC. | 90,000 | .36 | $589,500 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY FD | 90,000 | .36 | $589,500 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 86,880 | .35 | $486,528 | 31-Oct-09 | | H&Q LIFE SCIENCES INVESTORS | 70,007 | .28 | $769,376 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 49,153 | .20 | $275,256 | 31-Oct-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 38,055 | .15 | $418,224 | 30-Jun-09 | | TIAA-CREF FDS-SMALL-CAP EQUITY FUND | 33,800 | .13 | $371,462 | 30-Jun-09 | | Nicholas-Applegate Inst Fds-U.S. Micro Cap Fund | 31,300 | .12 | $343,987 | 30-Jun-09 | | VANGUARD EXPLORER FUND, INC. | 29,572 | .12 | $266,148 | 31-Jul-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 14,000 | .06 | $78,400 | 31-Oct-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 13,447 | .05 | $147,782 | 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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