| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | DIMENSIONAL FUND ADVISORS LP | 2,696,657 | 8.52 | $23,353,049 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,624,336 | 5.13 | $14,066,749 | 30-Sep-09 | | TCW GROUP, INC. (THE) | 1,618,906 | 5.12 | $14,019,725 | 30-Sep-09 | | BROWN CAPITAL MANAGEMENT, INC. | 1,598,062 | 5.05 | $13,839,216 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,028,718 | 3.25 | $8,908,697 | 30-Sep-09 | | ROYCE & ASSOCIATES, LLC | 814,734 | 2.57 | $7,055,596 | 30-Sep-09 | | STATE STREET CORPORATION | 695,666 | 2.20 | $6,024,467 | 30-Sep-09 | | ADVISORY RESEARCH, INC. | 4,056,520 | 12.82 | $35,129,463 | 30-Sep-09 | | NORTHERN TRUST CORPORATION | 412,274 | 1.30 | $3,458,978 | 30-Jun-09 | | American Capital Management, Inc. | 340,800 | 1.08 | $2,951,328 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | DFA U.S. SMALL CAP VALUE SERIES | 1,065,748 | 3.37 | $10,401,700 | 30-Apr-09 | | BROWN CAPITAL MANAGEMENT SMALL COMPANY FUND | 506,626 | 1.60 | $4,250,592 | 30-Jun-09 | | ROYCE OPPORTUNITY FUND | 431,659 | 1.36 | $3,621,619 | 30-Jun-09 | | VANGUARD STRATEGIC EQUITY FUND | 388,246 | 1.23 | $3,257,383 | 30-Jun-09 | | ISHARES RUSSELL 2000 INDEX FD | 344,427 | 1.09 | $2,982,737 | 30-Sep-09 | | ISHARES NASDAQ BIOTECHNOLOGY INDEX FUND | 324,873 | 1.03 | $2,644,466 | 31-Oct-09 | | DFA U.S. MICRO CAP SERIES | 318,453 | 1.01 | $3,108,101 | 30-Apr-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 313,820 | .99 | $2,632,949 | 30-Jun-09 | | VANGUARD SMALL-CAP INDEX FUND | 268,851 | .85 | $2,255,659 | 30-Jun-09 | | DFA Tax Managed U.S. Targeted Value Port | 256,910 | .81 | $2,448,352 | 31-Jul-09 |
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Value shown is computed using the security's price on the report date given.
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