| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BVF INC. | 10,649,271 | 30.37 | $14,908,979 | 30-Sep-09 | | Security Investors, LLC | 1,184,234 | 3.38 | $1,657,927 | 30-Sep-09 | | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1,165,500 | 3.32 | $1,631,700 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 912,963 | 2.60 | $1,278,148 | 30-Sep-09 | | Porter Orlin LLC | 490,227 | 1.40 | $686,317 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 453,058 | 1.29 | $634,281 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 270,931 | .77 | $379,303 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 166,342 | .47 | $232,878 | 30-Sep-09 | | CALPERS (CALIFORNIA-PUBLIC EMPLOYEES RETIREMENT SYSTEM) | 46,900 | .13 | $37,520 | 30-Jun-09 | | WEXFORD CAPITAL LLC | 44,600 | .13 | $62,440 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | SECURITY EQUITY FD-MID CAP VALUE SERIES | 866,300 | 2.47 | $693,040 | 30-Jun-09 | | SBL FUND 'V' SERIES (MID CAP VALUE) | 298,400 | .85 | $238,720 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 224,906 | .64 | $146,188 | 30-Apr-09 | | Security Equity Fd-Mid Cap Value Institutional Series | 166,800 | .48 | $133,440 | 30-Jun-09 | | SBL FUND 'O' SERIES (ALL CAP VALUE SERIES) | 100,100 | .29 | $80,080 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 70,600 | .20 | $56,480 | 30-Jun-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 59,722 | .17 | $47,777 | 30-Jun-09 | | DFA U.S. Core Equity 2 Portfolio | 26,570 | .08 | $17,270 | 30-Apr-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 22,451 | .06 | $31,431 | 30-Sep-09 | | DFA U.S. Vector Equity Portfolio | 5,440 | .02 | $3,536 | 30-Apr-09 |
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*
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Value shown is computed using the security's price on the report date given.
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