| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Barclays Global Investors UK Holdings Ltd | 863,283 | 3.68 | $6,396,927 | 30-Sep-09 | | Promark Investment Advisors, Inc. | 573,638 | 2.44 | $4,250,657 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 369,659 | 1.57 | $2,739,173 | 30-Sep-09 | | STATE STREET CORPORATION | 359,998 | 1.53 | $2,667,585 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 288,596 | 1.23 | $2,138,496 | 30-Sep-09 | | NORTHERN TRUST CORPORATION | 231,360 | .99 | $1,714,377 | 30-Sep-09 | | BAKER BROTHERS ADVISORS, LLC | 217,136 | .93 | $1,608,977 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 172,100 | .73 | $1,275,261 | 30-Sep-09 | | TIAA-CREF INVESTMENT MANAGEMENT, LLC | 143,234 | .61 | $1,061,363 | 30-Sep-09 | | CALPERS (CALIFORNIA-PUBLIC EMPLOYEES RETIREMENT SYSTEM) | 108,220 | .46 | $801,910 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | ISHARES RUSSELL 2000 INDEX FD | 288,673 | 1.23 | $1,541,513 | 31-Oct-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 159,680 | .68 | $852,691 | 31-Oct-09 | | DFA U.S. MICRO CAP SERIES | 154,651 | .66 | $997,498 | 31-Jul-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 145,210 | .62 | $850,930 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 128,247 | .55 | $751,527 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 96,915 | .41 | $567,921 | 30-Jun-09 | | DFA U.S. SMALL CAP SERIES | 59,158 | .25 | $381,569 | 31-Jul-09 | | EQ ADVISORS TRUST-EQ/SMALL COMPANY INDEX PORTFOLIO | 40,109 | .17 | $235,038 | 30-Jun-09 | | Goldman Sachs Structured Small Cap Equity Fund | 34,779 | .15 | $224,324 | 31-Jul-09 | | ISHARES Russell Micro Cap (TM) Index Fund | 34,261 | .15 | $182,953 | 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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