| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Barclays Global Investors UK Holdings Ltd | 4,921,959 | 7.03 | $82,049,056 | 30-Sep-09 | | NEXT CENTURY GROWTH INVESTORS LLC | 3,013,322 | 4.31 | $50,232,077 | 30-Sep-09 | | FMR LLC | 2,954,969 | 4.22 | $49,259,333 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 2,901,143 | 4.15 | $48,362,053 | 30-Sep-09 | | KALMAR INVESTMENTS INC. | 2,878,746 | 4.11 | $47,988,695 | 30-Sep-09 | | BLAIR (WILLIAM) & COMPANY, L.L.C. | 2,822,053 | 4.03 | $47,043,623 | 30-Sep-09 | | Bank of New York Mellon Corporation | 2,655,411 | 3.79 | $44,265,701 | 30-Sep-09 | | AXA | 2,615,719 | 3.74 | $43,604,035 | 30-Sep-09 | | Tygh Capital Management, Inc. | 2,247,532 | 3.21 | $37,466,358 | 30-Sep-09 | | TURNER INVESTMENT PARTNERS, INC. | 1,933,369 | 2.76 | $32,229,261 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY SMALL CAP STOCK FUND | 1,787,263 | 2.55 | $30,991,140 | 31-Jul-09 | | FIDELITY CONTRAFUND INC | 1,322,067 | 1.89 | $22,038,856 | 30-Sep-09 | | CALAMOS GROWTH FUND | 1,125,000 | 1.61 | $18,753,750 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 1,015,556 | 1.45 | $16,929,318 | 30-Sep-09 | | VANGUARD EXPLORER FUND, INC. | 934,800 | 1.34 | $16,209,432 | 31-Jul-09 | | ISHARES S&P SMALLCAP 600 INDEX FD | 900,253 | 1.29 | $14,746,144 | 31-Oct-09 | | VANGUARD SMALL-CAP INDEX FUND | 805,891 | 1.15 | $12,330,132 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 617,827 | .88 | $9,452,753 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 531,568 | .76 | $8,861,238 | 30-Sep-09 | | IShares S&P Small Cap 600 Growth Index Fund | 529,434 | .76 | $8,672,128 | 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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