| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | WELLINGTON MANAGEMENT COMPANY, LLP | 6,410,806 | 8.38 | $28,143,438 | 30-Sep-09 | | FEDERATED INVESTORS, INC. | 5,916,029 | 7.73 | $25,971,367 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 3,790,876 | 4.96 | $16,641,945 | 30-Sep-09 | | BLAIR (WILLIAM) & COMPANY, L.L.C. | 2,810,298 | 3.67 | $12,337,208 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 2,807,395 | 3.67 | $12,324,464 | 30-Sep-09 | | MASSACHUSETTS FINANCIAL SERVICES CO - OTHER | 2,730,190 | 3.57 | $11,985,534 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 1,897,075 | 2.48 | $8,328,159 | 30-Sep-09 | | FMR LLC | 8,309,852 | 10.86 | $36,480,250 | 30-Sep-09 | | CROSSLINK CAPITAL. INC. | 1,522,037 | 1.99 | $6,681,742 | 30-Sep-09 | | KOPP INVESTMENT ADVISORS. INC. | 1,413,717 | 1.85 | $6,206,217 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FEDERATED KAUFMANN FUND | 5,049,212 | 6.60 | $32,971,354 | 31-Jul-09 | | BLAIR (WILLIAM) MUTUAL FUNDS, INC.-SMALL CAP GROWTH FUND | 2,197,761 | 2.87 | $9,648,170 | 30-Sep-09 | | VANGUARD EXPLORER FUND, INC. | 1,686,544 | 2.20 | $11,013,132 | 31-Jul-09 | | FIDELITY SMALL CAP INDEPENDENCE FUND | 1,611,700 | 2.11 | $10,524,401 | 31-Jul-09 | | VARIABLE INSURANCE PRODUCTS FD-GROWTH PORTFOLIO | 1,573,347 | 2.06 | $6,906,993 | 30-Sep-09 | | Fidelity Small Cap Opportunities Fund | 1,512,944 | 1.98 | $9,879,524 | 31-Jul-09 | | FIDELITY ADVISOR EQUITY GROWTH FUND | 1,407,429 | 1.84 | $6,178,613 | 30-Sep-09 | | LORD ABBETT DEVELOPING GROWTH FUND | 1,237,903 | 1.62 | $8,083,506 | 31-Jul-09 | | Fidelity Small Cap Growth Fund | 1,150,000 | 1.50 | $7,509,500 | 31-Jul-09 | | ISHARES RUSSELL 2000 INDEX FD | 971,230 | 1.27 | $4,263,699 | 30-Sep-09 |
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Value shown is computed using the security's price on the report date given.
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