| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | THOMPSON, SIEGEL & WALMSLEY, INC. | 848,096 | 3.94 | $13,204,854 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 771,291 | 3.59 | $12,009,000 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 670,535 | 3.12 | $10,440,229 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 598,524 | 2.78 | $9,319,018 | 30-Sep-09 | | DnB Nor Asset Management (US), Inc. | 536,120 | 2.49 | $8,347,388 | 30-Sep-09 | | COLUMBIA PARTNERS, L.L.C, INVESTMENT MANAGEMENT | 474,998 | 2.21 | $7,395,718 | 30-Sep-09 | | GRANAHAN INVESTMENT MANAGEMENT INC. | 451,728 | 2.10 | $7,033,404 | 30-Sep-09 | | STATE STREET CORPORATION | 420,190 | 1.95 | $6,542,358 | 30-Sep-09 | | LOOMIS SAYLES & CO L P | 368,816 | 1.72 | $5,742,465 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 360,055 | 1.67 | $5,606,056 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | VANGUARD EXPLORER FUND, INC. | 401,538 | 1.87 | $7,131,314 | 31-Jul-09 | | Professionally Managed Portf-Winslow Green Growth Fund | 400,018 | 1.86 | $6,228,280 | 30-Sep-09 | | JOHN HANCOCK SMALL CAP EQUITY FUND | 312,416 | 1.45 | $3,873,958 | 31-Oct-09 | | ISHARES RUSSELL 2000 INDEX FD | 253,356 | 1.18 | $3,944,752 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 194,671 | .91 | $3,147,830 | 30-Jun-09 | | LOOMIS SAYLES SMALL CAP VALUE FUND | 187,459 | .87 | $3,031,212 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 132,752 | .62 | $2,066,948 | 30-Sep-09 | | BRIDGEWAY FDS INC-SMALL CAP VALUE FUND | 129,800 | .60 | $2,098,866 | 30-Jun-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 123,359 | .57 | $1,994,715 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 107,876 | .50 | $1,744,354 | 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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