| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | RENAISSANCE TECHNOLOGIES, LLC | 1,297,314 | 4.11 | $7,122,253 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,137,591 | 3.60 | $6,245,374 | 30-Sep-09 | | WATER ISLAND CAPITAL, LLC | 964,092 | 3.05 | $5,292,865 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 846,536 | 2.68 | $4,647,482 | 30-Sep-09 | | TSP Capital Management Group, LLC | 660,483 | 2.09 | $3,626,051 | 30-Sep-09 | | CQS Cayman Limited Partnership | 630,349 | 1.99 | $3,460,616 | 30-Sep-09 | | STATE STREET CORPORATION | 534,760 | 1.69 | $2,935,832 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 410,043 | 1.30 | $2,251,136 | 30-Sep-09 | | BVF INC. | 265,847 | .84 | $1,459,500 | 30-Sep-09 | | WELLCOME TRUST LIMITED AS TRUSTEE OF THE WELLCOME TRUST | 221,546 | .70 | $1,216,287 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | ARBITRAGE FUND | 894,008 | 2.83 | $5,131,605 | 31-Aug-09 | | ISHARES RUSSELL 2000 INDEX FD | 334,730 | 1.06 | $1,459,422 | 31-Oct-09 | | DFA U.S. SMALL CAP VALUE SERIES | 256,472 | .81 | $1,949,187 | 31-Jul-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 187,700 | .59 | $818,372 | 31-Oct-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 156,416 | .49 | $1,223,173 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 125,476 | .40 | $981,222 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 116,894 | .37 | $888,394 | 31-Jul-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 82,724 | .26 | $646,901 | 30-Jun-09 | | DFA U.S. SMALL CAP SERIES | 74,853 | .24 | $568,882 | 31-Jul-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 53,239 | .17 | $232,122 | 31-Oct-09 |
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Value shown is computed using the security's price on the report date given.
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